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

Abstract

Open AccessCCS ChemistryRESEARCH ARTICLES9 Dec 2022Dual Nanofillers-Reinforced Noncovalently Cross-Linked Polymeric Composites with Unprecedented Mechanical Strength Ni An, Youliang Zhu, Xiaohan Wang, Yixuan Li, Junjun Liu, Xu Fang, Zhongyuan Lu, Bai Yang and Junqi Sun Ni An , Youliang Zhu , Xiaohan Wang , Yixuan Li , Junjun Liu , Xu Fang , Zhongyuan Lu , Bai Yang and Junqi Sun https://doi.org/10.31635/ccschem.022.202202496 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail Noncovalently cross-linked polymer materials can reduce materials consumption and alleviate environmental pollution through healing, recycling, and reprocessing. However, it remains a huge challenge to fabricate superstrong noncovalently cross-linked polymer materials with mechanical strength comparable to highperformance engineering polymers. Herein, healable and reprocessable noncovalently cross-linked polymer composites with 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 composites with a tensile strength of ~158 MPa and Young's modulus of ~8.2 GPa. Serving as nanofillers, the CPDs can establish strong interactions with polymers in PAA-PVPON composites. The CPDs and the in situ-formed PAA-PVPON nanoparticles work in concert to significantly strengthen the PAA-PVPON-CPDs composites to an unprecedented strength. The PAAPVPON-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. Download figure Download PowerPoint Previous articleNext article FiguresReferencesRelatedDetails Issue AssignmentVolume 0Issue jaPage: 1-27Supporting Information Copyright & Permissions© 2022 Chinese Chemical Society Downloaded 53 times PDF downloadLoading ...