Dual Nanofillers-Reinforced Noncovalently Cross-Linked Polymeric Composites with Unprecedented Mechanical Strength  

作　　者：Ni An Youliang Zhu Xiaohan Wang Yixuan Li Junjun Liu Xu Fang Zhongyuan Lu Bai Yang Junqi Sun 

机构地区：[1]State Key Laboratory of Supramolecular Structure and Materials,College of Chemistry,Jilin University,Changchun 130012 [2]Joint Laboratory of Opto-Functional Theranostics in Medicine and Chemistry,The First Hospital of Jilin University,Changchun 130021 [3]Department of Hand and Foot Surgery,The First Hospital of Jilin University,Jilin University,Changchun 130031

出　　处：《CCS Chemistry》2023年第10期2312-2323,共12页中国化学会会刊(英文)

基　　金：supported by the National Natural Science Foundation of China(NSFC grant no.21935004).

摘　　要：Noncovalentlycross-linkedpolymermaterials through healing,recycling,and reprocessing can reduce materials consumption and alleviate environmental pollution.However,it remains a huge challenge to fabricate super-strong noncovalently cross-linked polymer materials with mechanical strength comparable to high-performance engineering polymers.Herein,healable and reprocessable noncovalently cross-linked polymer compositeswith an unprecedented mechanical strength are fabricated by complexation of polyacrylic acid(PAA),polyvinylpyrrolidone(PVPON),and carbonized polymer dots(CPDs)(denoted as PAA-PVPON-CPDs).The incorporation of 15 wt%CPDs generates PAA-PVPON-CPDs compositeswith a tensile strength of∼158 MPa and Young’s modulus of∼8.2GPa.Servingas nanofillers,theCPDs can establish strong interactions with polymers in PAA-PVPON composites.The CPDs and the in situ-formed PAAPVPON nanoparticles work in concert to significantly strengthen the PAA-PVPON-CPDs composites to an unprecedented strength.The PAA-PVPON-CPDs composites exhibit excellent impact resistance and damage tolerance because of the high mechanical strength of the composites and the energy dissipation mechanism of the CPDs and PAA-PVPON nanoparticles.Moreover,the fractured PAA-PVPON-CPDs composites can be healed to restore their original mechanical strength.

关 键 词：carbonized polymer dots noncovalently cross-linked polymers supramolecular polymers self-healing materials 

分 类 号：TB33[一般工业技术—材料科学与工程]