Xylan Plastic

材料科学 韧性 极限抗拉强度 复合材料 热塑性塑料 原材料 木聚糖 机械加工 化学工程 纤维素 化学 有机化学 工程类 冶金
作者
Siyu Jia,Ziwen Lv,Jun Rao,Baozhong Lü,Gegu Chen,Jing Bian,Ming‐Fei Li,Feng Peng
出处
期刊:ACS Nano [American Chemical Society]
卷期号:17 (14): 13627-13637 被引量:20
标识
DOI:10.1021/acsnano.3c02327
摘要

The increasing accumulation of plastic waste has brought serious environmental issues. Biodegradable plastics are promising candidates to solve the problem but still remain a scientific challenge. Here, xylan plastic (XP) was fabricated by a strategy of double cross-linking through etherification combined with hot pressing. The mechanical properties, particularly the toughness of XP, were significantly enhanced by the incorporation of chemical and physical cross-linking domains. The tensile strength, toughness, and modulus of XP can reach up to 55 MPa, 2.2 MJ/m3, and 1.7 GPa, respectively, which are superior to most traditional plastics. Dynamic mechanical analysis (DMA) characterizations confirmed that XP is thermoplastic and can be hot formed. Additionally, the reversible hydrogen bond interaction between xylan chains could be simply regulated by water molecules, rendering XP readily transformed and repeatedly reprogrammed into versatile 2D/3D shapes. Moreover, XP showed a low thermal expansion coefficient and excellent optical properties. Cytotoxicity and degradability tests demonstrated that XP had excellent nontoxicity and can be biodegraded in 60 days. This work thus suggests an avenue for the scalable production of high-performance xylan-based plastics, in which the raw material comes from industrial wastes and exhibits great potential in response to plastic pollution.
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