Development of PLA/Lignin Bio-Composites Compatibilized by Ethylene Glycol Diglycidyl Ether and Poly (ethylene glycol) Diglycidyl Ether
Poly (lactic acid) (PLA) is a promising green substitute for conventional petroleum-based plastics in a variety of applications. However, the wide application of PLA is still limited by its disadvantages, such as slow crystallization rate, inadequate gas barrier, thermal degradation, etc. In this st...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/20/4049 |
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| author | Abdul Shakoor Shar Ningning Wang Tianyu Chen Xiaoying Zhao Yunxuan Weng |
| author_facet | Abdul Shakoor Shar Ningning Wang Tianyu Chen Xiaoying Zhao Yunxuan Weng |
| author_sort | Abdul Shakoor Shar |
| collection | DOAJ |
| description | Poly (lactic acid) (PLA) is a promising green substitute for conventional petroleum-based plastics in a variety of applications. However, the wide application of PLA is still limited by its disadvantages, such as slow crystallization rate, inadequate gas barrier, thermal degradation, etc. In this study, lignin (1, 3, 5 PHR) was incorporated into PLA to improve the thermal, mechanical, and barrier properties of PLA. Two low-viscosity epoxy resins, ethylene glycol diglycidyl ether (EGDE) and poly (ethylene glycol) diglycidyl ether (PEGDE), were used as compatibilizers to enhance the performance of the composites. The addition of lignin improved the onset degradation temperature of PLA by up to 15 °C, increased PLA crystallinity, improved PLA tensile strength by approximately 15%, and improved PLA oxygen barrier by up to 58.3%. The addition of EGDE and PEGDE both decreased the glass transition, crystallization, and melting temperatures of the PLA/lignin composites, suggesting their compatabilizing and plasticizing effects, which contributed to improved oxygen barrier properties of the PLA/lignin composites. The developed PLA/lignin composites with improved thermal, mechanical, and gas barrier properties can potentially be used for green packaging applications. |
| first_indexed | 2024-03-10T20:56:36Z |
| format | Article |
| id | doaj.art-622669741488474ab7bbfd547820c08d |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T20:56:36Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-622669741488474ab7bbfd547820c08d2023-11-19T17:50:25ZengMDPI AGPolymers2073-43602023-10-011520404910.3390/polym15204049Development of PLA/Lignin Bio-Composites Compatibilized by Ethylene Glycol Diglycidyl Ether and Poly (ethylene glycol) Diglycidyl EtherAbdul Shakoor Shar0Ningning Wang1Tianyu Chen2Xiaoying Zhao3Yunxuan Weng4College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaCollege of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaCollege of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaCollege of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaCollege of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, ChinaPoly (lactic acid) (PLA) is a promising green substitute for conventional petroleum-based plastics in a variety of applications. However, the wide application of PLA is still limited by its disadvantages, such as slow crystallization rate, inadequate gas barrier, thermal degradation, etc. In this study, lignin (1, 3, 5 PHR) was incorporated into PLA to improve the thermal, mechanical, and barrier properties of PLA. Two low-viscosity epoxy resins, ethylene glycol diglycidyl ether (EGDE) and poly (ethylene glycol) diglycidyl ether (PEGDE), were used as compatibilizers to enhance the performance of the composites. The addition of lignin improved the onset degradation temperature of PLA by up to 15 °C, increased PLA crystallinity, improved PLA tensile strength by approximately 15%, and improved PLA oxygen barrier by up to 58.3%. The addition of EGDE and PEGDE both decreased the glass transition, crystallization, and melting temperatures of the PLA/lignin composites, suggesting their compatabilizing and plasticizing effects, which contributed to improved oxygen barrier properties of the PLA/lignin composites. The developed PLA/lignin composites with improved thermal, mechanical, and gas barrier properties can potentially be used for green packaging applications.https://www.mdpi.com/2073-4360/15/20/4049poly (lactic acid)ligninethylene glycol diglycidyl etherbarrier performance |
| spellingShingle | Abdul Shakoor Shar Ningning Wang Tianyu Chen Xiaoying Zhao Yunxuan Weng Development of PLA/Lignin Bio-Composites Compatibilized by Ethylene Glycol Diglycidyl Ether and Poly (ethylene glycol) Diglycidyl Ether Polymers poly (lactic acid) lignin ethylene glycol diglycidyl ether barrier performance |
| title | Development of PLA/Lignin Bio-Composites Compatibilized by Ethylene Glycol Diglycidyl Ether and Poly (ethylene glycol) Diglycidyl Ether |
| title_full | Development of PLA/Lignin Bio-Composites Compatibilized by Ethylene Glycol Diglycidyl Ether and Poly (ethylene glycol) Diglycidyl Ether |
| title_fullStr | Development of PLA/Lignin Bio-Composites Compatibilized by Ethylene Glycol Diglycidyl Ether and Poly (ethylene glycol) Diglycidyl Ether |
| title_full_unstemmed | Development of PLA/Lignin Bio-Composites Compatibilized by Ethylene Glycol Diglycidyl Ether and Poly (ethylene glycol) Diglycidyl Ether |
| title_short | Development of PLA/Lignin Bio-Composites Compatibilized by Ethylene Glycol Diglycidyl Ether and Poly (ethylene glycol) Diglycidyl Ether |
| title_sort | development of pla lignin bio composites compatibilized by ethylene glycol diglycidyl ether and poly ethylene glycol diglycidyl ether |
| topic | poly (lactic acid) lignin ethylene glycol diglycidyl ether barrier performance |
| url | https://www.mdpi.com/2073-4360/15/20/4049 |
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