Effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning
In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Abdullah, Muhammad Faiq [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021transfer abstract |
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| Übergeordnetes Werk: |
Enthalten in: Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study - Fitzgerald, Emily ELSEVIER, 2020, the international journal for the science and technology of polymers, Oxford |
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| Übergeordnetes Werk: |
volume:237 ; year:2021 ; day:10 ; month:12 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.polymer.2021.124378 |
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ELV05608448X |
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| 245 | 1 | 0 | |a Effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning |
| 264 | 1 | |c 2021transfer abstract | |
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| 520 | |a In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. | ||
| 520 | |a In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. | ||
| 650 | 7 | |a Poly(lactic acid) |2 Elsevier | |
| 650 | 7 | |a Morphology |2 Elsevier | |
| 650 | 7 | |a Beads-on-a-string |2 Elsevier | |
| 650 | 7 | |a Clogging |2 Elsevier | |
| 650 | 7 | |a Modified coaxial electrospinning |2 Elsevier | |
| 700 | 1 | |a Andriyana, Andri |4 oth | |
| 700 | 1 | |a Muhamad, Farina |4 oth | |
| 700 | 1 | |a Ang, Bee Chin |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Fitzgerald, Emily ELSEVIER |t Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study |d 2020 |d the international journal for the science and technology of polymers |g Oxford |w (DE-627)ELV005093368 |
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10.1016/j.polymer.2021.124378 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001602.pica (DE-627)ELV05608448X (ELSEVIER)S0032-3861(21)01001-6 DE-627 ger DE-627 rakwb eng 610 VZ 44.63 bkl 44.69 bkl Abdullah, Muhammad Faiq verfasserin aut Effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. Poly(lactic acid) Elsevier Morphology Elsevier Beads-on-a-string Elsevier Clogging Elsevier Modified coaxial electrospinning Elsevier Andriyana, Andri oth Muhamad, Farina oth Ang, Bee Chin oth Enthalten in Elsevier Science Fitzgerald, Emily ELSEVIER Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study 2020 the international journal for the science and technology of polymers Oxford (DE-627)ELV005093368 volume:237 year:2021 day:10 month:12 pages:0 https://doi.org/10.1016/j.polymer.2021.124378 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.63 Krankenpflege VZ 44.69 Intensivmedizin VZ AR 237 2021 10 1210 0 |
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10.1016/j.polymer.2021.124378 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001602.pica (DE-627)ELV05608448X (ELSEVIER)S0032-3861(21)01001-6 DE-627 ger DE-627 rakwb eng 610 VZ 44.63 bkl 44.69 bkl Abdullah, Muhammad Faiq verfasserin aut Effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. Poly(lactic acid) Elsevier Morphology Elsevier Beads-on-a-string Elsevier Clogging Elsevier Modified coaxial electrospinning Elsevier Andriyana, Andri oth Muhamad, Farina oth Ang, Bee Chin oth Enthalten in Elsevier Science Fitzgerald, Emily ELSEVIER Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study 2020 the international journal for the science and technology of polymers Oxford (DE-627)ELV005093368 volume:237 year:2021 day:10 month:12 pages:0 https://doi.org/10.1016/j.polymer.2021.124378 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.63 Krankenpflege VZ 44.69 Intensivmedizin VZ AR 237 2021 10 1210 0 |
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10.1016/j.polymer.2021.124378 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001602.pica (DE-627)ELV05608448X (ELSEVIER)S0032-3861(21)01001-6 DE-627 ger DE-627 rakwb eng 610 VZ 44.63 bkl 44.69 bkl Abdullah, Muhammad Faiq verfasserin aut Effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. Poly(lactic acid) Elsevier Morphology Elsevier Beads-on-a-string Elsevier Clogging Elsevier Modified coaxial electrospinning Elsevier Andriyana, Andri oth Muhamad, Farina oth Ang, Bee Chin oth Enthalten in Elsevier Science Fitzgerald, Emily ELSEVIER Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study 2020 the international journal for the science and technology of polymers Oxford (DE-627)ELV005093368 volume:237 year:2021 day:10 month:12 pages:0 https://doi.org/10.1016/j.polymer.2021.124378 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.63 Krankenpflege VZ 44.69 Intensivmedizin VZ AR 237 2021 10 1210 0 |
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10.1016/j.polymer.2021.124378 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001602.pica (DE-627)ELV05608448X (ELSEVIER)S0032-3861(21)01001-6 DE-627 ger DE-627 rakwb eng 610 VZ 44.63 bkl 44.69 bkl Abdullah, Muhammad Faiq verfasserin aut Effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. Poly(lactic acid) Elsevier Morphology Elsevier Beads-on-a-string Elsevier Clogging Elsevier Modified coaxial electrospinning Elsevier Andriyana, Andri oth Muhamad, Farina oth Ang, Bee Chin oth Enthalten in Elsevier Science Fitzgerald, Emily ELSEVIER Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study 2020 the international journal for the science and technology of polymers Oxford (DE-627)ELV005093368 volume:237 year:2021 day:10 month:12 pages:0 https://doi.org/10.1016/j.polymer.2021.124378 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.63 Krankenpflege VZ 44.69 Intensivmedizin VZ AR 237 2021 10 1210 0 |
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10.1016/j.polymer.2021.124378 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001602.pica (DE-627)ELV05608448X (ELSEVIER)S0032-3861(21)01001-6 DE-627 ger DE-627 rakwb eng 610 VZ 44.63 bkl 44.69 bkl Abdullah, Muhammad Faiq verfasserin aut Effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. Poly(lactic acid) Elsevier Morphology Elsevier Beads-on-a-string Elsevier Clogging Elsevier Modified coaxial electrospinning Elsevier Andriyana, Andri oth Muhamad, Farina oth Ang, Bee Chin oth Enthalten in Elsevier Science Fitzgerald, Emily ELSEVIER Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study 2020 the international journal for the science and technology of polymers Oxford (DE-627)ELV005093368 volume:237 year:2021 day:10 month:12 pages:0 https://doi.org/10.1016/j.polymer.2021.124378 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.63 Krankenpflege VZ 44.69 Intensivmedizin VZ AR 237 2021 10 1210 0 |
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effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning |
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Effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning |
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In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. |
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In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. |
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In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers. |
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Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers.</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Poly(lactic acid)</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Morphology</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Beads-on-a-string</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Clogging</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Modified coaxial electrospinning</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Andriyana, Andri</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Muhamad, Farina</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Ang, Bee Chin</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="n">Elsevier Science</subfield><subfield code="a">Fitzgerald, Emily ELSEVIER</subfield><subfield code="t">Functional outcomes at 12 months for patients with traumatic brain injury, intracerebral haemorrhage and subarachnoid haemorrhage treated in an Australian neurocritical care unit: A prospective cohort study</subfield><subfield code="d">2020</subfield><subfield code="d">the international journal for the science and technology of polymers</subfield><subfield code="g">Oxford</subfield><subfield code="w">(DE-627)ELV005093368</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:237</subfield><subfield code="g">year:2021</subfield><subfield code="g">day:10</subfield><subfield code="g">month:12</subfield><subfield code="g">pages:0</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1016/j.polymer.2021.124378</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ELV</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OLC-PHA</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">44.63</subfield><subfield code="j">Krankenpflege</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">44.69</subfield><subfield code="j">Intensivmedizin</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">237</subfield><subfield code="j">2021</subfield><subfield code="b">10</subfield><subfield code="c">1210</subfield><subfield code="h">0</subfield></datafield></record></collection>
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