光热双响应形状记忆聚己内酯的制备与性能  

Preparation and Properties of Photothermal Bi-Response Shape Memory Polycaprolactone

作　　者：张勇波 童大山 汪艳[1] Yongbo Zhang;Dashan Tong;Yan Wang(Material Science and Engineering School,Wuhan Institute of Technology,Wuhan 430073,China)

机构地区：[1]武汉工程大学材料科学与工程学院,湖北武汉430073

出　　处：《高分子材料科学与工程》2024年第5期154-159,共6页Polymer Materials Science & Engineering

基　　金：3D打印聚合物及复合材料广东省企业重点实验室(2018B030323001);武汉工程大学第十四届研究生教育创新基金(CX2022262)。

摘　　要：形状记忆聚合物(SMPs)因其形变量大、形状恢复性能优异及刺激相应方式丰富等优点在医疗器械、航天航空等多个领域有着广阔的应用前景。文中以羧基化的多壁碳纳米管(MWCNT)为光热转换填料,采用过氧化二异丙苯(DCP)热引发聚己内酯(PCL)交联制备了羧基化MWCNT/PCL光热双响应形状记忆材料,研究了该复合材料的光热转换性能、形状记忆性能及力学性能等。结果表明,羧基化MWCNT的加入使得材料具备了光响应的特性,同时对力学性能也有一定的提升;当DCP和羧基化MWCNT的质量分数分别为1.5%和1%时,材料的形状固定率和形状回复率最优,分别为99.37%和98.53%,且在近红外光照射下30 s内便能回复原样,表现出优秀的形状记忆性能。相较于未交联的复合材料,拉伸强度从15.37 MPa提高到27.85 MPa,提高了81.85%,而断裂伸长率从1046.5%降低至982.48%,下降了6.12%。Shape memory polymers(SMPs)have broad prospects in many fields such as medical devices and aerospace and so on due to their large shape variable,excellent shape recovery performance,and rich stimulation methods.In this paper,the carboxylated multiwall carbon nanotubes(MWCNT)were used as photothermal conversion filler on the basis of thermally initiated polycaprolactone(PCL)crosslinking with diisopropylbenzene peroxide(DCP).The carboxylated MWCNT/PCL photothermal response shape memory materials were prepared by melt blending method.The photothermal conversion properties,shape memory properties and mechanical properties of the composites were studied.The results show that the addition of carboxylated MWCNT makes the material have the characteristics of light response and improves the mechanical properties.When the mass fraction of DCP and carboxylated MWCNT is 1.5%and 1%respectively,the shape fixation rate and shape recovery rate of the material are the best,which are 99.37%and 98.53%,respectively.The material can restore its original shape within 30 s under near-infrared light irradiation,showing excellent shape memory performance.Compared with the uncrosslinked composite,the tensile strength is increased by 81.85%from 15.37 MPa to 27.85 MPa,while the elongation at break is decreased by 6.12%from 1046.5%to 982.48%.

关 键 词：形状记忆聚合物 聚己内酯 羧基化多壁碳纳米管 光热响应 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]