文献类型：期刊文献

英文题名：Catalyst-free self-healing fully bio-based vitrimers derived from tung oil: Strong mechanical properties, shape memory, and recyclability

作者：Xu, Ya-zhou[1,2] Fu, Pan[4] Dai, Song-lin[1] Zhang, Hai-bo[1] Bi, Liang-wu[1,3] Jiang, Jian-xin[2] Chen, Yu-xiang[1,3]

第一作者：Xu, Ya-zhou;许玉芝

通信作者：Chen, YX[1];Jiang, JX[2]|[a0005ed937047db97bfe9]陈玉湘;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Peoples R China;[2]Beijing Forestry Univ, Coll Mat Sci & Technol, Beijing 100083, Peoples R China;[3]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China;[4]Cent South Univ Forestry & Technol, Key Lab Econ Forest Cultivat & Protect, Minist Educ, Changsha 410004, Peoples R China

年份：2021

卷号：171

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20213510833218);Scopus(收录号：2-s2.0-85113490889);WOS:【SCI-EXPANDED(收录号:WOS:000696946700006)】；

基金：The authors would like to thank the National key research and development program of China (2016YFD0600804) and the National Key Technology R&D Program of China (2015BAD15B08) for financial support.

语种：英文

外文关键词：Bio-based vitrimers; Tung oil; High mechanical properties; Catalyst-free; Recyclable adhesives

摘要：Vegetable oil-based vitrimers are innovative renewable polymers that show promising applications. However, their applications are limited by their poor mechanical properties and the need for the use of a catalyst in their preparation. In this study, the renewable tung oil underwent the methyl esterification reaction, Diels-Alder reaction, and epoxidation reaction to obtain TOTGE with terminal epoxy groups. TOTGE was cured with citric acid (CA) to obtain catalyst-free, self-healing, high mechanical strength fully bio-based TOTGE-CA vitrimers. Due to the high reactivity of their terminal epoxy groups, the vitrimer networks have a high density of crosslinks, and thus show good thermal stability and mechanical properties. The curing agent CA introduces a large number of hydroxyl (-OH) groups into the vitrimers and these form abundant hydrogen (H) bonds. The -OH groups in the vitrimers act as a catalyst, allowing topological network rearrangement of the materials in the absence of an external catalyst. Due to their dynamic ester and H bonds, the vitrimers exhibit good self-healing, recyclability, and shape memory properties, making them promising candidates for use as repairable and recyclable adhesives.