文献类型：期刊文献

英文题名：Castor-oil-based, robust, self-healing, shape memory, and reprocessable polymers enabled by dynamic hindered urea bonds and hydrogen bonds

作者：Zhang, Jinshuai[1,2,3,4,5,6] Zhang, Chaoqun[7] Song, Fei[8] Shang, Qianqian[1,2,3,4,5,6] Hu, Yun[1,2,3,4,5,6] Jia, Puyou[1,2,3,4,5,6] Liu, Chengguo[1,2,3,4,5,6] Hu, Lihong[1,2,3,4,5,6] Zhu, Guoqiang[1,2,3,4,5,6] Huang, Jia[1,2,3,4,5,6] Zhou, Yonghong[1,2,3,4,5,6]

第一作者：Zhang, Jinshuai

通信作者：Liu, CG[1];Zhou, YH[1];Liu, CG[2];Zhou, YH[2];Liu, CG[3];Zhou, YH[3];Liu, CG[4];Zhou, YH[4];Liu, CG[5];Zhou, YH[5];Liu, CG[6];Zhou, YH[6]

机构：[1]Chinese Acad Forestry, Key Lab Biomass Energy & Mat, Nanjing, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing, Jiangsu, Peoples R China;[3]Chinese Acad Forestry, Natl Forestry & Grassland Adm, Key Lab Chem Engn Forest Prod, Nanjing, Jiangsu, Peoples R China;[4]Chinese Acad Forestry, Natl Engn Lab Biomass Chem Utilizat, Nanjing, Jiangsu, Peoples R China;[5]Inst Chem Ind Forest Prod Chinese Acad Forestry, 16 Suojin Wucun, Nanjing 210042, Peoples R China;[6]Chinese Acad Forestry, Nanjing, Jiangsu, Peoples R China;[7]South China Agr Univ, Coll Mat & Energy, Key Lab Biobased Mat & Energy Minist Educ, 483 Wushan Rd, Guangzhou 510642, Peoples R China;[8]Nanjing Forestry Univ, Coll Chem Engn, Nanjing 210037, Peoples R China

年份：2022

卷号：429

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20213910964341);Scopus(收录号：2-s2.0-85115917614);WOS:【SCI-EXPANDED(收录号:WOS:000718410600003)】；

基金：This research was funded by the National Natural Science Foundation of China (31822009 and 31770615) and the Fundamental Research Funds of CAF (CAFYBB2020QA005).

语种：英文

外文关键词：Castor oil; Hindered urea bonds; Self-healing; Recyclability; Shape memory

摘要：Developing biobased polyurethanes with repairability, reprocessability as well as robust mechanical properties remains a great challenge. Herein, novel, robust biobased polyurethane materials bearing hindered urea bonds (HUBs) derived from renewable castor oil are reported. The dynamic HUBs and hydrogen bonds that existed in HUBs provided these materials extremely low relaxation times (12.3 to 221 s at 100 degrees C) as well as excellent scratch healing efficiency (88.9-100% at 100 degrees C for 10 min) and recyclability (without obviously sacrificing the tensile properties at least 4 times). The selected sample also exhibited good shape memory behavior, with a shape fixity ratio above 88.4% and a shape recovery ratio above 81.3%. Remarkably, the polymers could undergo a rapid and reversible solid/liquid transformation under cooling and heating treatment. Besides, these HUBs materials demonstrated high adhesion strength (up to 2.53 MPa) when bonding stainless steel, and can be reused for at least 5 times without significant deterioration in adhesion strength. Finally, by mixing a certain amount of carbon nanotubes (CNTs) and adjusting the compositions of HUBs, recyclable and malleable conductive composites were achieved. In general, this work presents a green, simple, and universal approach to fabricate robust, sustainable polyurethanes with multiple functions like repairability, shape memory, malleability, and recyclability.