文献类型：期刊文献

英文题名：Bio-based epoxy vitrimer for recyclable and carbon fiber reinforced materials: Synthesis and structure-property relationship

作者：Li, Wenbin[1,3] Xiao, Laihui[2] Huang, Jinrui[1] Wang, Yigang[1] Nie, Xiaoan[1] Chen, Jie[1]

第一作者：Li, Wenbin

通信作者：Chen, J[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[2]Univ Birmingham, Sch Chem, Birmingham B15 2TT, England;[3]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Nanjing 10298, Jiangsu, Peoples R China

年份：2022

卷号：227

外文期刊名：COMPOSITES SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20222612266407);Scopus(收录号：2-s2.0-85132366579);WOS:【SCI-EXPANDED(收录号:WOS:000817742900001)】；

基金：The authors are grateful for the support and funding from the Innovation and Promotion Project for Forestry Science and Technology of Jiangsu Province (LYKJ [2019] 45), and the Jiangsu Key Lab of Biomass-based Fuels and Materials (JSBEM-S-202002). National Natural Science Foundation of China for Youth Science Funds (51803234), Fundamental Research Funds of Research Institute of Forest New Technology, CAF (CAFYBB2019SY028), the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFYBB2020QB006).

语种：英文

外文关键词：Vitrimer; Epoxy-acid-anhydride system; CFRMs; Degradable; Recycling

摘要：Recycling or degradation of epoxy resins is difficult because of their covalent cross-linking structures, which causes resource crisis, environmental pollution, and resource waste. To address this challenge, we reported a recyclable and degradable epoxy vitrimer with dynamic ester bonds prepared from tung oil and diglycidyl ether of bisphenol-A via epoxy-acid-anhydride crosslinking system. Owing to the compact rigid six-member ring and the anhydride structure, the epoxy vitrimer shows high thermal stability, and excellent dynamic mechanical, and mechanical properties with tensile strength of 59.21 +/- 1.02 MPa and glass transition temperature of 76.73 degrees C. The vitrimer network can achieve topological rearrangement via dynamic transesterification reactions with the addition of a Zn catalyst. Thus, the contrivable vitrimer exhibits excellent self-healing, shape memory, and physical recycling at elevated temperatures. Moreover, the epoxy vitrimer matrix has high joining strength with carbon fibers and can be used to prepare carbon-fiber-reinforced materials (CFRMs). The carbon fibers can be completely recycled from CFRMs through an ethanol-NaOH mixture solvent. This work can assist in preparation of degradable high-strength CFRMs using a recyclable tung-oil-based vitrimer matrix and provides a strategy for efficient recycling of carbon fibers from CFRMs.