文献类型：期刊文献

英文题名：Bottlebrush Polymer-Functionalized Graphene Oxide-Based Multifunctional Poly(vinyl alcohol) Nanocomposite Films with Exceptional Performance

作者：Deng, Tianbo[1];Xu, Binbin[1];Zhang, Ling[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Mat Sci & Engn,Key Lab Ultrafine Mat,Minist Ed, Shanghai 200237, Peoples R China

年份：2022

卷号：55

期号：23

起止页码：10703

外文期刊名：MACROMOLECULES

收录：;EI(收录号：20223712704718);WOS:【SCI-EXPANDED(收录号:WOS:000848089800001)】；

基金：This work was supported by the National Natural Science Foundation of China (21878092, 51621002, and 22001072) , the Shanghai Scientific and Technological Innovation Project (19JC1410400, 22ZR1479300) , the Program of Shanghai Academic Research Leader (19XD1401400) , "Chen Guang" Project (20CG38) , and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Graphene - Hydration - Nanocomposites - Nanosheets - Oxide films - Polymer films - Polymer matrix composites - Polyvinyl alcohols

摘要：Nanocomposites consisting of two-dimensional (2D) functional reinforcements embedded in a polymeric matrix provide great opportunities for the design of multifunctional artificial materials. However, the efficient formation of materials with high-performance structures and multifunctional properties is still challenging. Herein, we demonstrate a generic approach to fabricate multifunctional poly(vinyl alcohol) (PVA)-based nanocomposite films through a solvent evaporation method with modified graphene oxide (GO) nanosheets as the functional fillers. Inspired by the lubricating protein lubricin (LUB), anchored bottlebrush polymers (BBPs) were designed as a molecular glue to maintain the bottlebrush conformation immobilized on the GO nanosheets, thereby dominating the directed assembly of GO nanosheets in a PVA matrix. The BBPs have polyzwitterionic brushes which provide a strongly bound hydrated layer and antifouling property and mussel-mimetic anchors which strongly anchor the copolymer to the GO surface. Furthermore, polyzwitterion-containing BBPs tightly combined with PVA chains act as a bridge for linking the GO nanosheets and the PVA matrix. The highly hydrated bottlebrush architecture mediates repulsion between the adjacent GO surfaces, yielding the well-dispersed and aligned GO nanosheets in the nanocomposites. The fabulous coupling of a layered arrangement of GO nanosheets and highly hydrated polyzwitterionic bottlebrushes of BBPs enables the resultant BBPspz GO/PVA nanocomposite film to exhibit a high photothermal efficiency (55.1%), UV resistance, and an exceptional gas barrier (84.8% decrease) at low modified-GO loadings as well as a superior antimicrobial property. This study provides a new approach for designing multifunctional nanocomposites with ordered structures and giving great promise to various applications.