Promoted biodegradation behavior of poly(L-lactic acid) in seawater conditions through blending amorphous polyhydroxyalkanoate

IF 2.8 4区工程技术 Q2 POLYMER SCIENCE Macromolecular Research Pub Date : 2024-01-26 DOI:10.1007/s13233-023-00239-1

Geonhee Han, Juhee Yoon, Jiho Hwang, Changsuk Lee, Eunhye Lee, Kichull Yoon, Hyo Won Kwak, Hyoung-Joon Jin

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Abstract

This study investigates the biodegradation behavior of a blend of poly(L-lactic acid) (PLLA) and amorphous polyhydroxyalkanoate (aPHA) (50:50 wt%) under seawater conditions for 12 weeks at 30 °C. The results revealed that the inclusion of aPHA in the blend enhanced the biodegradation of PLLA. The average molecular weight analysis indicated that the blend underwent homogeneous degradation primarily through exo-chain scission. Morphological changes observed via scanning electron microscopy demonstrated that aPHA first underwent decomposition in the blend, creating channels within PLLA that enhanced water and microorganism contact and promoted PLLA hydrolysis. The release of low-molecular-weight acids from the aPHA decomposition further facilitated PLLA hydrolysis.

Graphical abstract

The graph depicts fluctuations in the weight-average molecular weight of PLLA, the PLLA/aPHA blend, and aPHA throughout the biodegradation period under seawater conditions.

Abstract Image

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通过混合无定形聚羟基烷酸，促进聚（L-乳酸）在海水条件下的生物降解行为

本研究调查了聚左旋乳酸（PLLA）和无定形聚羟基烷酸（aPHA）（50:50 wt%）混合物在海水条件下的生物降解行为，该混合物在 30 °C下的生物降解时间为12周。结果表明，在混合物中加入 aPHA 增强了 PLLA 的生物降解能力。平均分子量分析表明，混合物主要通过外链断裂发生均匀降解。通过扫描电子显微镜观察到的形态变化表明，aPHA 首先在混合物中发生分解，在 PLLA 中形成通道，从而加强了水和微生物的接触，促进了 PLLA 的水解。该图描述了在海水条件下整个生物降解期间 PLLA、PLLA/aPHA 混合物和 aPHA 的重量平均分子量的波动情况。

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来源期刊

Macromolecular Research 工程技术-高分子科学

CiteScore

4.70

自引率

8.30%

发文量

100

审稿时长

1.3 months

期刊介绍： Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.