文献类型：期刊文献

英文题名：A fully bio-based epoxy vitrimer: Self-healing, triple-shape memory and reprocessing triggered by dynamic covalent bond exchange

作者：Yang, Xinxin[1,2] Guo, Lizhen[2] Xu, Xu[2] Shang, Shibin[1] Liu, He[1]

第一作者：Yang, Xinxin

通信作者：Liu, H[1];Xu, X[2]

机构：[1]Natl Forestry & Grassland Adm, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Key Lab Chem Engn Forest Prod,Chinese Acad Forest, Natl Engn Lab Biomass Chem Utilizat,Key Lab Bioma, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Prov Key Lab Chem & Utilizat Agroforest B, Nanjing 210037, Jiangsu, Peoples R China

年份：2020

卷号：186

外文期刊名：MATERIALS & DESIGN

收录：;EI(收录号：20194607681657);Scopus(收录号：2-s2.0-85074754414);WOS:【SCI-EXPANDED(收录号:WOS:000505221700005)】；

基金：This work was supported by the Fundamental Research Funds of CAF (CAFYBB2017QB007) and National Natural Science Foundation of China (31600462).

语种：英文

外文关键词：Bio-based; Dynamic covalent bond; Glass transition temperature; Renewable resources; Stress relaxation

摘要：Vitrimers are a new type of polymers with promising applications in innovativematerials. Epoxidized soybean oil (ESO) is an ideal candidate for vitrimer preparation owing to its abundant epoxy groups. However, preparing plant oil-based vitrimers with high glass transition temperatures (T-g) and strength remains challenging. A novel and fully bio-based vitrimer with a T-g above room temperature was synthesized from ESO and a rosin derivative-fumaropimaric acid (FPA) and exhibited excellent self-healing, shape memory, and reprocessing due to the presence of dynamic covalent bond exchange. The fully bio-based ESO-FPA vitrimer exhibited a T-g of 65 degrees C and a tensile strength of 16 MPa, which resulted from the rigid structure and tricarboxylic groups of FPA. The effect of transesterification reactions on the network structure was confirmed through stress relaxation. Our work expands the applications of commercial ESO in vitrimer materials and provides a novel approach to prepare bio-based vitrimers with desirable properties. (C) 2019 The Authors. Published by Elsevier Ltd.