全生物基循环生物复合材料的化学回收单体和纤维

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-07-14 DOI:10.1016/j.compositesb.2025.112814

Erfan Oliaei , Philip Josephson , Céline Montanari , Lars A. Berglund , Peter Olsén

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引用次数: 0

摘要

从摇篮到摇篮的理念是半结构纤维素生物复合材料的理想选择。在避免纤维素纤维降解的同时，实现了热固性基体的选择性化学回收，使其返回可重复使用的单体。一种完全生物来源的pla基（聚乳酸）热固性聚合物被分子设计用于化学回收和化学非均质植物纤维网络固化。通过在高纤维含量的纤维素木纤维网络中逐步聚合聚乳酸的四臂功能预聚物进行固化。FT-IR数据支持共价光纤/基体界面键合。这些生态友好型生物复合材料具有高模量（24 GPa）和高透光率。在碱条件下，基质被选择性地降解回初始构件乳酸单体。这种进展对纤维素纤维没有明显的损害。合成的绿色指标显示了这种材料概念在循环经济中的强大潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Fully biobased circular biocomposites for chemical recycling to monomer and fiber

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Fully biobased circular biocomposites for chemical recycling to monomer and fiber

The cradle-to-cradle philosophy is desirable for semi-structural cellulose biocomposites. Selective chemical recycling of a thermoset matrix back to reusable monomers was realized while avoiding cellulose fiber degradation. A fully biosourced, PLA-based (polylactic acid) thermoset polymer was molecularly designed for chemical recycling and for curing in chemically heterogeneous plant fiber networks. Curing was by stepwise polymerization of 4-arm functional prepolymers of PLA in a cellulosic wood fiber network of high fiber content. FT-IR data supported covalent fiber/matrix interface bonding. These eco-friendly biocomposites showed high modulus (24 GPa) and high optical transmittance. The matrix was selectively degraded back to the initial building block, lactic acid monomer, under alkali conditions. This progressed without apparent damage to the cellulosic fibers. The green metrics of the synthesis showed strong potential for this material concept in a circular economy.

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.