Fabrication of biodegradable polyvinyl alcohol-based plastics toward technical lignin valorization.

IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Shuang-Lin Zou, Ling-Ping Xiao, Wen-Zheng Yin, Tao Gui, Run-Cang Sun
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引用次数: 0

Abstract

The fabrication of composite materials from lignin has attracted increasing attention to reducing the dependence of petrochemical-based resources on carbon neutrality. However, the low content of lignin in the biocomposites remains a challenge. Herein, industrial lignin is fractionated by an organic solvent to reduce its structural heterogeneity. Subsequently, the fractionated lignin samples are integrated with polyvinyl alcohol (PVA) to fabricate plastics characterized by uniform thickness and smooth surfaces. The resultant composite films exhibit tensile strength and strain up to 75 MPa and 1050%, respectively, which surpass state-of-the-art lignin-based bioplastics. The mechanism investigations reveal that the enhanced mechanical properties are due to the internal non-covalent interactions derived from the hydroxyl groups of lignin and PVA. Notably, the PVA/lignin films are biodegradable after 92 days' burial in soil. This study paves the way for the rational design of lignin-based biodegradable polymers as sustainable alternatives to conventional plastics.

面向技术木质素增值的可生物降解聚乙烯醇基塑料的制备。
利用木质素制备复合材料以减少石油化工资源对碳中和的依赖已引起越来越多的关注。然而,生物复合材料中木质素的低含量仍然是一个挑战。本文采用有机溶剂对工业木质素进行分馏,以减少其结构不均匀性。随后,将木质素分馏样品与聚乙烯醇(PVA)相结合,制备出厚度均匀、表面光滑的塑料。合成的复合薄膜的拉伸强度和应变分别高达75 MPa和1050 %,超过了目前最先进的木质素基生物塑料。机理研究表明,机械性能的增强是由于木质素和聚乙烯醇的羟基产生的内部非共价相互作用。值得注意的是,PVA/木质素薄膜在土壤中埋藏92 天后是可生物降解的。该研究为合理设计木质素基生物可降解聚合物作为传统塑料的可持续替代品铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
International Journal of Biological Macromolecules
International Journal of Biological Macromolecules 生物-生化与分子生物学
CiteScore
13.70
自引率
9.80%
发文量
2728
审稿时长
64 days
期刊介绍: The International Journal of Biological Macromolecules is a well-established international journal dedicated to research on the chemical and biological aspects of natural macromolecules. Focusing on proteins, macromolecular carbohydrates, glycoproteins, proteoglycans, lignins, biological poly-acids, and nucleic acids, the journal presents the latest findings in molecular structure, properties, biological activities, interactions, modifications, and functional properties. Papers must offer new and novel insights, encompassing related model systems, structural conformational studies, theoretical developments, and analytical techniques. Each paper is required to primarily focus on at least one named biological macromolecule, reflected in the title, abstract, and text.
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