基于可逆硼氧六元环交联的自修复聚氨酯  

Self-Healing Polyurethane Based on Reversible Crosslinking Boroxines

作　　者：易明 王犁[1,2] 来婧娟 安鹏 周利华 李振宇[1,2] 武元鹏 郑朝晖 丁小斌[3] 杨小林 肖立[4] Ming Yi;Li Wang;Jingjuan Lai;Peng An;Lihua Zhou;Zhenyu Li;Yuanpeng Wu;Zhaohui Zheng;Xiaobin Ding;Xiaolin Yang;Li Xiao(School of New Energy and Materials,Research Center for Functional Materials of Working Fluid in Oil and Gas Field,Southwest Petroleum University,Chengdu 610500,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Sichuan Basalt Fiber Composite Material Development and Application Engineering Technology Research Center,Chengdu 610500,China;Chengdu Institute of Organic Chemistry,Chinese Academy of Sciences,Chengdu 610041,China;Sichuan Yangshida Waterproof Material Company with Limited,Chengdu 610500,China)

机构地区：[1]西南石油大学新能源与材料学院油气田工作液功能材料研究中心,四川成都610500 [2]油气藏地质及开发工程国家重点实验室四川省玄武岩纤维复合材料开发及应用工程技术研究中心,四川成都610500 [3]中国科学院成都有机化学研究所,四川成都610041 [4]四川杨氏达防水材料有限公司,四川成都610500

出　　处：《高分子材料科学与工程》2023年第5期125-133,共9页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(52173301);四川省国际合作项目(2022YFH0019);青年科技创新团队(2017CXTD01)。

摘　　要：自修复聚氨酯一直是近年来的研究热点。文中以聚四氢呋喃二醇(PTMEG)、异佛尔酮二异氰酸酯(IPDI)和4-羟基苯硼酸(HPBA)为原材料,制备了基于硼氧六元环的高强度自修复聚氨酯(PU)。利用傅里叶变换红外光谱仪对其进行结构表征;利用热重分析和差示扫描量热法考察其热性能;研究了PU的力学性能、自修复性能和形状记忆性能。结果表明,硼氧六元环结构的引入使PU具有高强度和优异的自修复性能。当HPBA含量从0 mmol增加到0.75 mmol时,PU的拉伸强度从(23.8±1.8)MPa提高到(51.3±4.2)MPa;在80℃修复36 h后,PU/P-0.7的修复效率达到80.9%±4.2%。此外,PU还具有热响应的形状记忆性能,75℃时,其形状回复率达到96.1%±1.7%。利用凝胶渗透色谱法测试了PU的相对分子质量,其数均分子量为3.28×10^(4)。Self-healing polyurethane has been a research hotspot in recent years.High strength and self-healing polyurethane(PU)based on boroxine bonds was prepared using polytetramethylene ether glycol(PTMEG),isophorone diisocyanate(IPDI)and 4-hydroxyphenylboric acid(HPBA).FT-IR was used to characterize the structure of PU,and thermogravimetric analysis(TGA)and differential scanning calorimetry(DSC)were used to investigate the thermal properties.The mechanical properties,self-healing properties and shape memory properties of PU were also studied.The results show that PU has high strength and excellent self-healing properties due to the formation of boroxine bond.The tensile strength of PU is increased from(23.8±1.8)MPa to(51.3±4.2)MPa with the increase of HPBA content from 0 mmol to 0.75 mmol.The self-healing efficiency of PU/P-0.7 can rise up to 80.9%±4.2%after healing at 80℃for 36 h.Additionally,PU exhibits excellent thermal-responsive shape memory properties,and the shape recovery ratio can up to 96.1%±1.7%at 75℃.The molecular weight of PU was measured by gel permeation chromatography.The numerical average molecular weight is 3.28×10^(4).

关 键 词：聚氨酯 硼氧六元环 高强度 自修复 形状记忆 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]