A sustainable manufacturing method of thermoset composites based on covalent adaptable network polymers
A sustainable manufacturing method of thermoset composites based on covalent adaptable network polymers
复制标题
基于共价自适应网络聚合物的热固性复合材料可持续制造方法
DOI：
10.1016/j.compositesb.2021.109004
复制
发表时间：
2021-05-24
影响因子：
13.1
通讯作者：
Yu, Kai
中科院分区：
文献类型：
--
作者：
He, Xu;Shi, Xiaojuan;Yu, Kai
聚合物复合材料的可持续制造越来越受到全球的关注。现有的工业制造方法迅速消耗自然资源，并产生大量难以回收的制造废物。在这项研究中，我们开发了一种基于共价自适应网络（CAN）聚合物的动态特性的热固性复合材料的可持续制造方法。它使用废弃的聚合物废料作为原料来制备具有定制厚度的固体聚合物膜。它们用于通过热压来制造具有受控纤维含量的复合材料层，其中可延展基质融合到纤维织物中并将它们焊接在一起。纤维和热固性基质都可以回收用于下一轮制造。该复合材料在每个制造周期中表现出与直接用聚合物溶液模塑的复合材料几乎相同的机械性能。所制造的复合材料具有延展性，并且可以容易地再加工成不同的形状，而无需使用复杂的成型工具。与传统的制造方法相比，开发的方法显着减少了不可再生资源的消耗，聚合物废物的产生，以及制造成本。它具有应用于各种聚合物体系的巨大潜力。
Sustainable manufacturing of polymer composites has received increasing global attention. Existing industrial manufacturing methods rapidly consume natural resources and generate significant manufacturing wastes that are difficult to recycle. In this study, we develop a sustainable manufacturing method for thermoset composites based on the dynamic features of covalent adaptable network (CAN) polymers. It uses the scrap polymer wastes as feedstock to fabricate solid polymer films with tailored thicknesses. They are used to manufacture composite lamina with controlled fiber contents via hot pressing, wherein the malleable matrix fuses into the fiber fabric and welds them together. Both fiber and thermoset matrix can be recycled for the next round of manufacturing. The composites exhibit near-identical mechanical performance in each manufacturing cycle as the ones directly molded with the polymer solution. The fabricated composites are malleable and can be readily reprocessed into different shapes without using complicated molding tools. Compared to the conventional manufacturing methods, the developed one significantly decreases the consumption of nonrenewable resources, polymer waste generation, as well as manufacturing cost. It has the great potential to be applied to a wide variety of polymer systems.