Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide
Biodegradable PLA foams are in great demand in many fields such as packaging and construction. However, foaming ability of PLA is confined by its poor melt viscoelasticity. To address this problem, a naturally formed nanofiller, halloysite nanotubes (HNTs) were added. By adding HNTs, foaming window...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Guo, Fumin [verfasserIn] Liao, Xia [verfasserIn] Li, Shaojie [verfasserIn] Yan, Zhihui [verfasserIn] Tang, Wanyu [verfasserIn] Li, Guangxian [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: The journal of supercritical fluids - Amsterdam [u.a.] : Elsevier Science, 1988, 177 |
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| Übergeordnetes Werk: |
volume:177 |
| DOI / URN: |
10.1016/j.supflu.2021.105344 |
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| 245 | 1 | 0 | |a Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide |
| 264 | 1 | |c 2021 | |
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| 520 | |a Biodegradable PLA foams are in great demand in many fields such as packaging and construction. However, foaming ability of PLA is confined by its poor melt viscoelasticity. To address this problem, a naturally formed nanofiller, halloysite nanotubes (HNTs) were added. By adding HNTs, foaming window of PLA was successfully extended. The compressive performance and thermal conductivities of the obtained foams were investigated. It could be seen that the PLA/HNTs composite foam with an expansion ratio of 19.2 folds exhibited the lowest thermal conductivity 34.29 mW/(m·K). The compressive modulus increased from 3.6 to 11.8 MPa with the increase of mass fraction of HNTs from 0 to 5 wt%. To further improve the compressive performance of foams, an annealing process was conducted. After annealing, compressive modulus of pure PLA foam almost doubled because of the increased crystallinity. Vicat softening temperature of annealed foams also increased by about 5 °C. | ||
| 650 | 4 | |a PLA/HNTs foams | |
| 650 | 4 | |a Heat insulation | |
| 650 | 4 | |a Compression resistance | |
| 650 | 4 | |a Supercritical carbon dioxide foaming | |
| 700 | 1 | |a Liao, Xia |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Shaojie |e verfasserin |4 aut | |
| 700 | 1 | |a Yan, Zhihui |e verfasserin |4 aut | |
| 700 | 1 | |a Tang, Wanyu |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Guangxian |e verfasserin |4 aut | |
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10.1016/j.supflu.2021.105344 doi (DE-627)ELV006491103 (ELSEVIER)S0896-8446(21)00184-4 DE-627 ger DE-627 rda eng 540 DE-600 35.12 bkl 58.13 bkl 50.38 bkl Guo, Fumin verfasserin aut Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Biodegradable PLA foams are in great demand in many fields such as packaging and construction. However, foaming ability of PLA is confined by its poor melt viscoelasticity. To address this problem, a naturally formed nanofiller, halloysite nanotubes (HNTs) were added. By adding HNTs, foaming window of PLA was successfully extended. The compressive performance and thermal conductivities of the obtained foams were investigated. It could be seen that the PLA/HNTs composite foam with an expansion ratio of 19.2 folds exhibited the lowest thermal conductivity 34.29 mW/(m·K). The compressive modulus increased from 3.6 to 11.8 MPa with the increase of mass fraction of HNTs from 0 to 5 wt%. To further improve the compressive performance of foams, an annealing process was conducted. After annealing, compressive modulus of pure PLA foam almost doubled because of the increased crystallinity. Vicat softening temperature of annealed foams also increased by about 5 °C. PLA/HNTs foams Heat insulation Compression resistance Supercritical carbon dioxide foaming Liao, Xia verfasserin aut Li, Shaojie verfasserin aut Yan, Zhihui verfasserin aut Tang, Wanyu verfasserin aut Li, Guangxian verfasserin aut Enthalten in The journal of supercritical fluids Amsterdam [u.a.] : Elsevier Science, 1988 177 Online-Ressource (DE-627)320613917 (DE-600)2021726-2 (DE-576)25193828X nnns volume:177 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.12 Chemische Thermodynamik Phasenlehre Physikalische Chemie 58.13 Thermische Verfahrenstechnik 50.38 Technische Thermodynamik AR 177 |
| spelling |
10.1016/j.supflu.2021.105344 doi (DE-627)ELV006491103 (ELSEVIER)S0896-8446(21)00184-4 DE-627 ger DE-627 rda eng 540 DE-600 35.12 bkl 58.13 bkl 50.38 bkl Guo, Fumin verfasserin aut Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Biodegradable PLA foams are in great demand in many fields such as packaging and construction. However, foaming ability of PLA is confined by its poor melt viscoelasticity. To address this problem, a naturally formed nanofiller, halloysite nanotubes (HNTs) were added. By adding HNTs, foaming window of PLA was successfully extended. The compressive performance and thermal conductivities of the obtained foams were investigated. It could be seen that the PLA/HNTs composite foam with an expansion ratio of 19.2 folds exhibited the lowest thermal conductivity 34.29 mW/(m·K). The compressive modulus increased from 3.6 to 11.8 MPa with the increase of mass fraction of HNTs from 0 to 5 wt%. To further improve the compressive performance of foams, an annealing process was conducted. After annealing, compressive modulus of pure PLA foam almost doubled because of the increased crystallinity. Vicat softening temperature of annealed foams also increased by about 5 °C. PLA/HNTs foams Heat insulation Compression resistance Supercritical carbon dioxide foaming Liao, Xia verfasserin aut Li, Shaojie verfasserin aut Yan, Zhihui verfasserin aut Tang, Wanyu verfasserin aut Li, Guangxian verfasserin aut Enthalten in The journal of supercritical fluids Amsterdam [u.a.] : Elsevier Science, 1988 177 Online-Ressource (DE-627)320613917 (DE-600)2021726-2 (DE-576)25193828X nnns volume:177 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.12 Chemische Thermodynamik Phasenlehre Physikalische Chemie 58.13 Thermische Verfahrenstechnik 50.38 Technische Thermodynamik AR 177 |
| allfields_unstemmed |
10.1016/j.supflu.2021.105344 doi (DE-627)ELV006491103 (ELSEVIER)S0896-8446(21)00184-4 DE-627 ger DE-627 rda eng 540 DE-600 35.12 bkl 58.13 bkl 50.38 bkl Guo, Fumin verfasserin aut Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Biodegradable PLA foams are in great demand in many fields such as packaging and construction. However, foaming ability of PLA is confined by its poor melt viscoelasticity. To address this problem, a naturally formed nanofiller, halloysite nanotubes (HNTs) were added. By adding HNTs, foaming window of PLA was successfully extended. The compressive performance and thermal conductivities of the obtained foams were investigated. It could be seen that the PLA/HNTs composite foam with an expansion ratio of 19.2 folds exhibited the lowest thermal conductivity 34.29 mW/(m·K). The compressive modulus increased from 3.6 to 11.8 MPa with the increase of mass fraction of HNTs from 0 to 5 wt%. To further improve the compressive performance of foams, an annealing process was conducted. After annealing, compressive modulus of pure PLA foam almost doubled because of the increased crystallinity. Vicat softening temperature of annealed foams also increased by about 5 °C. PLA/HNTs foams Heat insulation Compression resistance Supercritical carbon dioxide foaming Liao, Xia verfasserin aut Li, Shaojie verfasserin aut Yan, Zhihui verfasserin aut Tang, Wanyu verfasserin aut Li, Guangxian verfasserin aut Enthalten in The journal of supercritical fluids Amsterdam [u.a.] : Elsevier Science, 1988 177 Online-Ressource (DE-627)320613917 (DE-600)2021726-2 (DE-576)25193828X nnns volume:177 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.12 Chemische Thermodynamik Phasenlehre Physikalische Chemie 58.13 Thermische Verfahrenstechnik 50.38 Technische Thermodynamik AR 177 |
| allfieldsGer |
10.1016/j.supflu.2021.105344 doi (DE-627)ELV006491103 (ELSEVIER)S0896-8446(21)00184-4 DE-627 ger DE-627 rda eng 540 DE-600 35.12 bkl 58.13 bkl 50.38 bkl Guo, Fumin verfasserin aut Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Biodegradable PLA foams are in great demand in many fields such as packaging and construction. However, foaming ability of PLA is confined by its poor melt viscoelasticity. To address this problem, a naturally formed nanofiller, halloysite nanotubes (HNTs) were added. By adding HNTs, foaming window of PLA was successfully extended. The compressive performance and thermal conductivities of the obtained foams were investigated. It could be seen that the PLA/HNTs composite foam with an expansion ratio of 19.2 folds exhibited the lowest thermal conductivity 34.29 mW/(m·K). The compressive modulus increased from 3.6 to 11.8 MPa with the increase of mass fraction of HNTs from 0 to 5 wt%. To further improve the compressive performance of foams, an annealing process was conducted. After annealing, compressive modulus of pure PLA foam almost doubled because of the increased crystallinity. Vicat softening temperature of annealed foams also increased by about 5 °C. PLA/HNTs foams Heat insulation Compression resistance Supercritical carbon dioxide foaming Liao, Xia verfasserin aut Li, Shaojie verfasserin aut Yan, Zhihui verfasserin aut Tang, Wanyu verfasserin aut Li, Guangxian verfasserin aut Enthalten in The journal of supercritical fluids Amsterdam [u.a.] : Elsevier Science, 1988 177 Online-Ressource (DE-627)320613917 (DE-600)2021726-2 (DE-576)25193828X nnns volume:177 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.12 Chemische Thermodynamik Phasenlehre Physikalische Chemie 58.13 Thermische Verfahrenstechnik 50.38 Technische Thermodynamik AR 177 |
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10.1016/j.supflu.2021.105344 doi (DE-627)ELV006491103 (ELSEVIER)S0896-8446(21)00184-4 DE-627 ger DE-627 rda eng 540 DE-600 35.12 bkl 58.13 bkl 50.38 bkl Guo, Fumin verfasserin aut Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Biodegradable PLA foams are in great demand in many fields such as packaging and construction. However, foaming ability of PLA is confined by its poor melt viscoelasticity. To address this problem, a naturally formed nanofiller, halloysite nanotubes (HNTs) were added. By adding HNTs, foaming window of PLA was successfully extended. The compressive performance and thermal conductivities of the obtained foams were investigated. It could be seen that the PLA/HNTs composite foam with an expansion ratio of 19.2 folds exhibited the lowest thermal conductivity 34.29 mW/(m·K). The compressive modulus increased from 3.6 to 11.8 MPa with the increase of mass fraction of HNTs from 0 to 5 wt%. To further improve the compressive performance of foams, an annealing process was conducted. After annealing, compressive modulus of pure PLA foam almost doubled because of the increased crystallinity. Vicat softening temperature of annealed foams also increased by about 5 °C. PLA/HNTs foams Heat insulation Compression resistance Supercritical carbon dioxide foaming Liao, Xia verfasserin aut Li, Shaojie verfasserin aut Yan, Zhihui verfasserin aut Tang, Wanyu verfasserin aut Li, Guangxian verfasserin aut Enthalten in The journal of supercritical fluids Amsterdam [u.a.] : Elsevier Science, 1988 177 Online-Ressource (DE-627)320613917 (DE-600)2021726-2 (DE-576)25193828X nnns volume:177 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.12 Chemische Thermodynamik Phasenlehre Physikalische Chemie 58.13 Thermische Verfahrenstechnik 50.38 Technische Thermodynamik AR 177 |
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Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide |
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Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide |
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Guo, Fumin |
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Guo, Fumin Liao, Xia Li, Shaojie Yan, Zhihui Tang, Wanyu Li, Guangxian |
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Guo, Fumin |
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10.1016/j.supflu.2021.105344 |
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heat insulating pla/hnts foams with enhanced compression performance fabricated by supercritical carbon dioxide |
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Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide |
| abstract |
Biodegradable PLA foams are in great demand in many fields such as packaging and construction. However, foaming ability of PLA is confined by its poor melt viscoelasticity. To address this problem, a naturally formed nanofiller, halloysite nanotubes (HNTs) were added. By adding HNTs, foaming window of PLA was successfully extended. The compressive performance and thermal conductivities of the obtained foams were investigated. It could be seen that the PLA/HNTs composite foam with an expansion ratio of 19.2 folds exhibited the lowest thermal conductivity 34.29 mW/(m·K). The compressive modulus increased from 3.6 to 11.8 MPa with the increase of mass fraction of HNTs from 0 to 5 wt%. To further improve the compressive performance of foams, an annealing process was conducted. After annealing, compressive modulus of pure PLA foam almost doubled because of the increased crystallinity. Vicat softening temperature of annealed foams also increased by about 5 °C. |
| abstractGer |
Biodegradable PLA foams are in great demand in many fields such as packaging and construction. However, foaming ability of PLA is confined by its poor melt viscoelasticity. To address this problem, a naturally formed nanofiller, halloysite nanotubes (HNTs) were added. By adding HNTs, foaming window of PLA was successfully extended. The compressive performance and thermal conductivities of the obtained foams were investigated. It could be seen that the PLA/HNTs composite foam with an expansion ratio of 19.2 folds exhibited the lowest thermal conductivity 34.29 mW/(m·K). The compressive modulus increased from 3.6 to 11.8 MPa with the increase of mass fraction of HNTs from 0 to 5 wt%. To further improve the compressive performance of foams, an annealing process was conducted. After annealing, compressive modulus of pure PLA foam almost doubled because of the increased crystallinity. Vicat softening temperature of annealed foams also increased by about 5 °C. |
| abstract_unstemmed |
Biodegradable PLA foams are in great demand in many fields such as packaging and construction. However, foaming ability of PLA is confined by its poor melt viscoelasticity. To address this problem, a naturally formed nanofiller, halloysite nanotubes (HNTs) were added. By adding HNTs, foaming window of PLA was successfully extended. The compressive performance and thermal conductivities of the obtained foams were investigated. It could be seen that the PLA/HNTs composite foam with an expansion ratio of 19.2 folds exhibited the lowest thermal conductivity 34.29 mW/(m·K). The compressive modulus increased from 3.6 to 11.8 MPa with the increase of mass fraction of HNTs from 0 to 5 wt%. To further improve the compressive performance of foams, an annealing process was conducted. After annealing, compressive modulus of pure PLA foam almost doubled because of the increased crystallinity. Vicat softening temperature of annealed foams also increased by about 5 °C. |
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Heat insulating PLA/HNTs foams with enhanced compression performance fabricated by supercritical carbon dioxide |
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Liao, Xia Li, Shaojie Yan, Zhihui Tang, Wanyu Li, Guangxian |
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