文献类型：期刊文献

英文题名：Catalyst-Free, Self-Healing, and Recyclable Tung Oil-Based Epoxy Vitrimers with Dynamic Ester Bonds

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

第一作者：Chang, Qianyong

通信作者：Chen, J[1]

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

年份：2023

卷号：224

期号：22

外文期刊名：MACROMOLECULAR CHEMISTRY AND PHYSICS

收录：;EI(收录号：20233714706562);Scopus(收录号：2-s2.0-85170276416);WOS:【SCI-EXPANDED(收录号:WOS:001093020500001)】；

基金：The authors are grateful for the support and funding from the National Natural Science Foundation of China for Youth Science Funds (32101471), Innovation and Promotion Project for Forestry Science and Technology of Jiangsu Province (LYKJ [2019] 45), the Jiangsu Key Lab of Biomass-based Fuels and Materials (JSBEM-S-202002).

语种：英文

外文关键词：bio-based epoxy resin; catalyst-free; dynamic ester bonds; recycling

摘要：Low toughness and nonrecyclability severely limit the applications of traditional thermosets and are not in line with the concept of sustainable development. To solve these problems, water is used as the solvent, and a tung oil-based tetrafunctional carboxylic acid (TFA) curing agent is obtained through a "one-pot" method based on previous works. This green synthesis method is suitable for synthesizing tung oil-based polycarboxylic acid curing agents from various olefin-containing polyacids. At the same time, the vitrimers (DGEBA-TFA) are prepared with diglycidyl ether of bisphenol (DGEBA) as the skeleton, and applied to carbon fiber reinforced composites (CFRCs). The tensile strength, tensile modulus and elongation at break of DGEBA-TFA are 64.62 MPa, 2.55 GPa, and 4.31%, respectively, which are comparable to previous works. Hence, the performance of the vitrimers is not reduced while simplifying the experimental steps. Meanwhile, DGEBA-TFA exhibits excellent self-healing, shape memory, and recycling abilities. The vitrimers can be reprocessed without additional catalysts, and the recovery rate remained at 91.3% in the third cycle. DGEBA-TFA-CFs exhibite excellent tensile strength. This work solves the problems in previous works and makes TFA more likely to be applied into practical industrial production. Using water as a solvent, a tung oil-based tetrafunctional carboxylic acid (TFA) curing agent is obtained through a "one-pot method". This green synthesis method outperforms previous and can be applied to the synthesis of tung oil-based polycarboxylic acid curing agent from various olefin-containing polyacids.image