文献类型：期刊文献

英文题名：Tadpole-like bottlebrush polymer-modified multiwalled carbon nanotubes: A strategy for interface-strengthened polymer nanocomposites with exceptional performance

作者：Deng, Tianbo[1];Peng, Zhiyuan[1];Gao, Yuan[1];Zhao, He[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, Minist Educ,Sch Mat Sci & Engn,Key Lab Ultrafine M, Shanghai 200237, Peoples R China

年份：2024

卷号：274

外文期刊名：COMPOSITES PART B-ENGINEERING

收录：;EI(收录号：20240815569058);WOS:【SCI-EXPANDED(收录号:WOS:001184052200001)】；

基金：This work was supported by the National Natural Science Foundation of China (U22B20143, 22278140, 52273008, and 22001072) , the Shanghai Scientific and Technological Innovation Project (22DZ1205900 and 22ZR1479300) , Shanghai Municipal Science and Technology Major Project, Shanghai Rising-Star Program (23QA1402500) , "Chen Guang" Project (20CG38) , the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Polymer nanocomposites; Double -layered interface; Tadpole -like bottlebrush polymers; Enhanced mechanical properties; Biodegradability

摘要：Nanocomposites incorporating hierarchically structured nanofillers create great opportunities to generate highperformance artificial materials. However, the rational design of the chemistry and structure of interfaces within polymer matrix is still challenging due to the intrinsic mismatch between nanofiller and matrix. Herein, we report an effective approach to fabricate chitosan (CS) -based nanocomposites with integrated high strength and toughness whose interfaces are chemically modulated by tadpole -like bottlebrush polymers (BBPs) modified multiwalled carbon nanotubes (MWCNTs). The tadpole -like PCL-b-(PCL-g-PGMA) BBPs, containing a bottlebrush poly(epsilon-caprolactone)-g-poly(glycidyl methacrylate) (PCL-g-PGMA) main body and a linear soft PCL tail, act as a bridge to connect the MWCNTs and CS matrix, resulting in the soft inner layer (PCL tail) and the stretchable cross -linked outer layer (PCL-g-PGMA main body) at the interface of the CS/MWCNTs-BBPs nanocomposite films. Significantly, unlike traditional block copolymers (BCPs) toughening with limited stretching spacing, the coupling of stretched PGMA brush and soft PCL backbone in PCL-g-PGMA main body impart the MWCNTs-BBPs with stretchable interfacial spatial distance when the MWCNTs bear stretching force. The resultant CS/MWCNTsBBPs nanocomposite film with 1.5 wt% MWCNTs loading exhibits high tensile strength (up to 80.6 % increase), exceptional elongation at break (up to 380 % increase), and superior toughness (up to 976 % increase) in comparison with the neat CS. This study represents a new strategy for designing interface -strengthened nanocomposites with exceptional performance and holding great promise in a wide range of applications.