Method for preparing high performance graphene-polyvinyl alcohol composite fiber

The invention discloses a method for preparing high performance graphene-polyvinyl alcohol composite fiber, the method comprises the following steps: 1) functionalization of blocked isocyanate groupsof graphene quantum dots; 2) preparation of a spinning solution of polyvinyl alcohol-graphene quantum dots (PVA-GQD); 3) wet spinning; 4) post-treatment of nascent fibers; the method is simple, shortin process, low in cost and suitable for large-scale production, and does not require modification of existing polyvinyl alcohol wet spinning process equipment, and the prepared PVA-GQD fiber not onlyhas excellent mechanical properties and easy dispersibility, but also has a metallic luster, and is an ideal concrete reinforcement material, packaging material and clothing fabric. 本发明公开了种高性能石墨烯-聚乙烯醇复合纤维制备方法，其特征在于，包括以下步骤：1)石墨烯量子点的封闭异氰酸酯基功能化；2)聚乙烯醇-石墨烯量子点(PVA-GQD)纺丝溶液的制备；3)湿法纺丝；4)初生纤维的后处理；本发明简便、流程短、成本低且适合大规模化生产，并无需对现有聚乙烯醇湿法纺丝工艺设备进行改动，所制得PVA-GQD纤维不仅具有优异的力学性能和易分散特性，并且外观呈现金属光泽，是非常理想的混凝土增强材料、包装材料和服用面料。