文献类型：期刊文献

英文题名：Toughening epoxy resin by constructing pi-pi interaction between a tung oil-based modifier and epoxy

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

第一作者：Xiao, Laihui

通信作者：Chen, J[1];Huang, JR[1];Nie, XA[1]|[a000589b5308f5ef7bcf9]陈洁;[a0005997aa787f4d4afa0]聂小安;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod,Key Lab Biomass Energy, Natl Engn Lab Biomass Chem Utilizat,Coinnovat Ctr, Jiangsu Prov Key Lab Chem Engn Forest Prod,Natl F, 16 Suojin Wucun, Nanjing 210042, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry New Technol, Xiangshan Rd, Beijing 100091, Peoples R China

年份：2021

卷号：170

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20212410507719);Scopus(收录号：2-s2.0-85107807590);WOS:【SCI-EXPANDED(收录号:WOS:000689462000005)】；

基金：This work was financially supported by the Innovation and Promotion Project for Forestry Science and Technology of Jiangsu Province (LYKJ[2019]45), 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：Sacrificial bond; Toughness; Diglycidyl ether of bisphenol A; Phase separation; Ductility

摘要：Thermosets of the diglycidyl ether of bisphenol A (DGEBA) are normally brittle owing to its rigid structure. To address this problem, a bioinspired strategy to form sacrificial bonds in a curing system, which may enhance the flexibility of epoxy thermosets and maintain a favorable strength simultaneously has been proposed. A tung (Aleurites montana L.) oil diglyceride based-acid (TODGA) that may construct sacrificial bonds with the epoxy matrix in the form of pi-pi interactions was prepared, and was added into a DGEBA / polyetheramine curing system at varying ratios. TODGA can greatly improve the flexibility and toughness of epoxy thermosets. At the addition of 7.5 wt%, the elongation at break, toughness, and impact strength are improved from 5.9 % to 86.6 %, from 2.1 to 19.0 MJ m(-3), and from 4.3 to 5.9 kJ.m(-2) respectively, while the tensile strength is maintained at 34.8 MPa. In comparison, the toughening effect of TODGA outperforms that of commercial epoxidized soybean (Glycine max (L.) Merr.) oil. Although TODGA is a flexible modifier, it does not significantly decrease glass transition temperature and thermal stability. These results demonstrate that fabricating sacrificial bonds is a practical way to toughen epoxy thermosets, and TODGA can be potentially utilized as a commercial toughening agent.