Enhancing the Mechanical Properties of Inherently Brittle, Biobased and Biodegradable Polyhydroxybutyrate (PHB) Polymer by Cotton Fibre Reinforcement and Interfacial Grafting

IF 6.1 3区材料科学 Q2 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Advanced Sustainable Systems Pub Date : 2025-05-19 DOI:10.1002/adsu.202500294

Yilin He, Vinod Kumar Kannaujiya, Linguangze Zhuo, Wilson Ling, Chun H. Wang, Cyrille Boyer, Jin Zhang

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Abstract

The accumulation of fossil-fuel-based plastic waste drives the need for sustainable packaging materials. Stricter regulations and consumer demand for eco-friendly products have expanded the biodegradable plastics market. Polyhydroxybutyrate (PHB), a microbial biopolymer, is biodegradable but inherently brittle. This study enhances PHB's strength and ductility by reinforcing it with polyvinyl alcohol (PVA)-coated cotton fibres and further improving interfacial bonding through maleic anhydride (MA) grafting. Compared to neat PHB, incorporating PVA-coated cotton fibres increases tensile strength and failure strain by 290% and 109%, respectively. MA grafting further enhances toughness (ninefold increase) and interlaminar fracture toughness (twofold rise), while reducing helium permeation to 60%. These enhancements stem from PVA's hydrophilicity and MA-induced hydrogen bonding, highlighting the potential of PVA-coated cotton fibre/MA-grafted PHB composites as sustainable materials for packaging and biomedical applications.

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用棉纤维增强和界面接枝提高固有脆性、生物基和可生物降解聚羟基丁酸酯（PHB）聚合物的力学性能

化石燃料塑料废物的积累推动了对可持续包装材料的需求。更严格的法规和消费者对环保产品的需求扩大了生物降解塑料市场。聚羟基丁酸酯（PHB）是一种微生物生物聚合物，是可生物降解的，但具有固有的脆性。本研究通过聚乙烯醇（PVA）包覆棉纤维增强PHB，并通过马来酸酐（MA）接枝进一步改善界面结合，从而提高PHB的强度和延展性。与纯PHB相比，添加pva涂层棉纤维的拉伸强度和破坏应变分别提高了290%和109%。MA接枝进一步提高了韧性（增加9倍）和层间断裂韧性（增加2倍），同时将氦渗透率降低到60%。这些增强源于PVA的亲水性和ma诱导的氢键，突出了PVA涂层棉纤维/ ma接枝PHB复合材料作为包装和生物医学应用的可持续材料的潜力。

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来源期刊

Advanced Sustainable Systems Environmental Science-General Environmental Science

CiteScore

10.80

自引率

4.20%

发文量

186

期刊介绍： Advanced Sustainable Systems, a part of the esteemed Advanced portfolio, serves as an interdisciplinary sustainability science journal. It focuses on impactful research in the advancement of sustainable, efficient, and less wasteful systems and technologies. Aligned with the UN's Sustainable Development Goals, the journal bridges knowledge gaps between fundamental research, implementation, and policy-making. Covering diverse topics such as climate change, food sustainability, environmental science, renewable energy, water, urban development, and socio-economic challenges, it contributes to the understanding and promotion of sustainable systems.