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Improving the flame retardancy and accelerating the degradation of poly (lactic acid) in soil by introducing fully bio-based additives.

Authors
  • Qiu, Shuang1
  • Li, Yuchun2
  • Qi, Peng2
  • Meng, Dan2
  • Sun, Jun3
  • Li, Hongfei1
  • Cui, Zheng4
  • Gu, Xiaoyu2
  • Zhang, Sheng5
  • 1 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China. , (China)
  • 2 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, China. , (China)
  • 3 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, China. Electronic address: [email protected] , (China)
  • 4 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Key Laboratory of Carbon Fiber and Functional Polymers, Beijing University of Chemical Technology, Ministry of Education, Beijing, China. , (China)
  • 5 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, China; Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, China. Electronic address: [email protected] , (China)
Type
Published Article
Journal
International journal of biological macromolecules
Publication Date
Oct 22, 2021
Volume
193
Issue
Pt A
Pages
44–52
Identifiers
DOI: 10.1016/j.ijbiomac.2021.10.119
PMID: 34695492
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

In this study, a novel bio-based flame retardant LC-PA is prepared by the Mannich reaction between phytic acid (PA) and L-citrulline (LC). LC-PA is combined with tannic acid (TA) and introduced into PLA to improve fire performance and accelerate biodegradability. Compared with control PLA, the PLA composite containing 10% LC-PA/TA increases the LOI value to 26.9%, reaches a V-0 rating in the UL-94 test, and reduces the peak heat release rate and total heat release by 24.5% and 21.1%, respectively. More importantly, the introduction of LC-PA/TA accelerates the degradation rate of PLA in soil, which is of significance for biodegradable materials. The addition of LC-PA/TA can attract water and provide a suitable energy source for microbial proliferation, accelerating the hydrolysis and microbial degradation of PLA. This work provides a practical approach for high flame retardancy and rapid biodegradability in the soil to the bio-based polymer. Copyright © 2021 Elsevier B.V. All rights reserved.

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