文献类型：期刊文献

英文题名：Recyclable non-isocyanate polyurethanes containing a dynamic covalent network derived from epoxy soybean oil and CO2

作者：Yang, Xinxin[1,2] Ren, Chunyu[1] Liu, Xiuxiu[1] Sun, Penghao[2] Xu, Xu[2] Liu, He[1] Shen, Minggui[1] Shang, Shibin[1] Song, Zhanqian[1]

第一作者：Yang, Xinxin

通信作者：Liu, H[1];Shen, MG[1];Xu, X[2]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Key Lab Biomass Energy & Mat,Natl Engn Lab Biomas, Key Lab Chem Engn Forest Prod,Natl Forestry & Gra, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coll Chem Engn,Int Innovat Ctr Forest Chem & Mat, Jiangsu Prov Key Lab Chem & Utilizat Agroforest B, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Jiangsu, Peoples R China

年份：2021

卷号：5

期号：16

起止页码：6160-6170

外文期刊名：MATERIALS CHEMISTRY FRONTIERS

收录：;EI(收录号：20213310774883);Scopus(收录号：2-s2.0-85112410902);WOS:【SCI-EXPANDED(收录号:WOS:000673212200001)】；

基金：This work was supported by the Fundamental Research Funds of CAF (CAFYBB2020QC003) and the National Natural Science Foundation of China (32071708).

语种：英文

外文关键词：Amines - Carbon dioxide - Carbonation - Dynamics - Greenhouse effect - Hot pressing - Polyurethanes - Shape memory effect - Stress relaxation

摘要：As one of the important reasons for the greenhouse effect, CO2 can be effectively fixed by reacting with epoxides to synthesize the raw material cyclic carbonate of non-isocyanate polyurethanes (NIPUs). Thus, the environmental problems caused by CO2 and toxic isocyanates can be alleviated. Hence, we reported a strategy to use CO2 by preparing bio-based NIPUs using cyclic carbonated soybean oil with amines. The effect of the structure of the NIPUs on their mechanical properties, thermal properties, and dynamic thermomechanical properties was explored. More importantly, stress relaxation was performed to confirm the bond exchange behavior of hydroxyl with carbamate. The mechanical properties of NIPUs after physical hot pressing and chemical degradation recycling can be restored to at least 85% of their original values, indicating excellent reprocessing. The shape of the NIPUs is almost completely recovered, confirming the attractive shape memory. This work reveals an effective method for preparing bio-based NIPUs using the cyclic carbonate obtained by fixing CO2 with epoxy soybean oil; as expected, they exhibit interesting reprocessing and shape memory performance.