Polyvinyl alcohol fiber with enhanced strength and modulus and intense cyan fluorescence based on covalently functionalized graphene quantum dots  

作　　者：Manman Ou Yunjian Zhu Jiahao Liu Zhaoxuan Liu Jianjun Wang Jun Sun Chuanxiang Qin Lixing Dai 

机构地区：[1]College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China

出　　处：《Chinese Chemical Letters》2025年第2期222-227,共6页中国化学快报(英文版)

基　　金：supported by the National Key Research and Development Program of China(No.2017YFB0309401);State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials of Soochow University。

摘　　要：In this study,we proposed a novel and efficient way to strengthen polyvinyl alcohol(PVA)fiber using graphene quantum dots(GQDs).PVA molecular chains were grafted onto the surface of GQDs through Friedel-Crafts alkylation reaction to obtain functionalized GQDs(f-GQDs),and PVA/f-GQDs composite fiber was successfully prepared by wet spinning and post-treatment.The tensile strength and Young's modulus of the composite fiber reached up to 1229.24 MPa and 35.36 GPa which were approximately twice and 4 times those of the pure PVA fiber,respectively.Moreover,the composite fiber was demonstrated excellent resistance to solvents.In addition,the PVA/f-GQDs composite fiber showed intense and uniform cyan fluorescence,meanwhile,it could maintain stable solid-state fluorescence in acid and alkali solutions and particularly after long-term immersion in water(1 month).This study proposes a promising route for obtaining high-performance conventional fibers with some new functions.

关 键 词：Polyvinyl alcohol fiber Graphene quantum dots Enhancement FLUORESCENCE 

分 类 号：TQ342.41[化学工程—化纤工业]