文献类型：期刊文献

英文题名：Tung Oil-Derived Epoxy Vitrimers with High Mechanical Strength, Toughness, and Excellent Recyclability

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

第一作者：Xiao, Laihui

通信作者：Chen, J[1]|[a000589b5308f5ef7bcf9]陈洁;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Key Lab Biomass Energy & Mat,Key Lab Chem Engn For, Nanjing 210042, Jiangsu, Peoples R China;[2]Natl Ctr Agr Utilizat Res, USDA, ARS, Peoria, IL 61604 USA;[3]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing 100091, Peoples R China

年份：2022

卷号：10

期号：30

起止页码：9829-9840

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20223212550156);Scopus(收录号：2-s2.0-85135513420);WOS:【SCI-EXPANDED(收录号:WOS:000831069100001)】；

基金：This work was financially supported by Innovation and Promotion Project for Forestry Science and Technology of Jiangsu province (LYKJ [2019] 45) and Jiangsu Key Lab of Biomass-based Fuels and Materials (JSBEM-S-202002) . This work was supported in part by the U.S. Department of Agriculture, Agricultural Research Service.

语种：英文

外文关键词：diglycidyl ether of bisphenol A; catalyst-free; bio-based; cross-linking density; reversible covalent bond

摘要：The application of diglycidyl ether of bisphenol A (DGEBA) is severely limited due to the poor toughness of its thermosets, and the growing concern for sustainability calls for materials with recyclability. Thus, two tung oil-based compounds (DA-MA and TA) with different contents of carboxylic acid and anhydride were prepared and used to cure DGEBA to fabricate vitrimers, a kind of thermoset cross-linked through reversible covalent bonds. Test results show that vitrimers derived from tung oil (EP-DA-MA and EP-TA) exhibit excellent mechanical strength and toughness. In particular, the tensile strength, elongation at break, bending strength, bending toughness, and impact strength of EP-DA-MA are 63.17 MPa, 5.34%, 92.96 MPa, 1.09 kJ center dot m(-2), and 7.73 kJ center dot m(-2), respectively, while these parameters of the control, DGEBA cured with commercial methyl nadic anhydride, are 60.86 MPa, 1.77%, 78.94 MPa, 0.14 kJ center dot m(-2), and 4.42 kJ center dot m(-2). Meanwhile, high content of reversible ester bonds and secondary hydroxyl groups may facilitate the transesterification in the recycling process; thus, the crushed vitrimers of EP-DA-MA and EP-TA can be remolded without additional catalysts, and the tensile strength of the recycled samples can reach almost 100% of the original sample size, suggesting excellent malleability and recyclability. Therefore, the tung oil-derived epoxy vitrimers are promising candidates for utilization as adhesives, coatings, and matrix resins.