生物塑料
纤维素
材料科学
石油化工
生物降解
热成型
纤维素乙醇
共价键
极限抗拉强度
高分子科学
复合材料
有机化学
废物管理
化学
工程类
作者
Guowen Zhou,Haishan Zhang,Zhiping Su,Xiaoqian Zhang,Haonan Zhou,Le Yu,Chaoji Chen,Xiaohui Wang
标识
DOI:10.1002/adma.202301398
摘要
The growing environmental concern over petrochemical-based plastics continuously promotes the exploration of green and sustainable substitute materials. Compared with petrochemical products, cellulose has overwhelming superiority in terms of availability, cost, and biodegradability; however, cellulose's dense hydrogen-bonding network and highly ordered crystalline structure make it hard to be thermoformed. A strategy to realize the partial disassociation of hydrogen bonds in cellulose and the reassembly of cellulose chains via constructing a dynamic covalent network, thereby endowing cellulose with thermal processability as indicated by the observation of a moderate glass transition temperature (Tg = 240 °C), is proposed. Moreover, the cellulosic bioplastic delivers a high tensile strength of 67 MPa, as well as excellent moisture and solvent resistance, good recyclability, and biodegradability in nature. With these advantageous features, the developed cellulosic bioplastic represents a promising alternative to traditional plastics.
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