具有温度敏感特性的高强度聚(N-异丙基丙烯酰胺)基纳米纤维膜  

Poly(N-isopropylacrylamide)-based nanofiber membranes with temperature-sensitive and excellent mechanical properties

作　　者：周鉴澄 陈国华[2] 陈丹青[2] ZHOU Jiancheng;CHEN Guohua;CHEN Danqing(College of Chemical Engineering,Huaqiao University,Xiamen 361021,China;College of Materials Science and Engineering,Huaqiao University,Xiamen 361021,China)

机构地区：[1]华侨大学化工学院,厦门361021 [2]华侨大学材料科学与工程学院,厦门361021

出　　处：《复合材料学报》2023年第6期3441-3448,共8页Acta Materiae Compositae Sinica

基　　金：福建省科技计划项目(2018H0019,2017H2001)。

摘　　要：聚(N-异丙基丙烯酰胺)(PNIPAM)同时含有亲水性的酰胺基和疏水性的异丙基,是目前应用最广泛的一种具有温度敏感特性的聚合物,其相关产品在组织工程、医疗卫生和智能织物等领域拥有广阔的应用前景。本文应用自由基聚合法成功合成PNIPAM,并创新性地采用静电纺丝技术将其制备成一种具有温度敏感特性的纳米纤维膜,随后尝试将聚乙二醇甲醚(mPEG)与PNIPAM按不同比例进行共聚来探究PNIPAM-comPEG的各项性能表现。研究结果表明:制备得到的温敏纤维膜能随着温度的变化呈现出显著的亲、疏水性转变。与纯PNIPAM温敏纤维膜相比,经共聚处理后的温敏纤维膜的力学性能得到显著提升,能在大量吸水溶胀的状态下保持纤维固有形态;共聚后纤维膜的残重率提高321%,初始分解温度提高240%;其在室温下的水接触角减小超过16°,亲水性得到一定程度的提升;其低临界相变温度也从31.7℃提高至43.6℃,温度响应范围扩大。Poly(N-isopropylacrylamide)(PNIPAM),which contains both hydrophilic amide and hydrophobic isopropyl groups,is one of the most widely used temperature-sensitive polymers,and its related products have promising applications in the fields of tissue engineering,medical care and smart fabrics.In this study,PNIPAM was successfully synthesized by free radical polymerization,and PNIPAM was prepared into temperature-sensitive nano-membranes by electrospinning technology innovatively.Then,we tried to copolymerize polyethylene glycol methyl ether(mPEG)and PNIPAM in different proportions to investigate the performance of PNIPAM-co-mPEG.The results showed that the temperature-sensitive nano-membranes exhibited significant hydrophilic and hydrophobic transitions with temperature changes.Compared with the pure PNIPAM temperature-sensitive nano-membranes,the mechanical properties of the PNIPAM-co-mPEG were significantly improved,and it could maintain the inherent fiber morphology under the condition of large water absorption and swelling.The residual weight rate and the initial decomposition temperature of PNIPAM-co-mPEG are increased by 321%and 240%,respectively.The water contact angle of PNIPAM-co-mPEG at room temperature decreases by more than 16°,which improves the hydrophilicity to a certain extent.Moreover,the low critical solution temperature of PNIPAM-co-mPEG is increased from 31.7℃to 43.6℃,the temperature-sensitive range is expanded.

关 键 词：静电纺丝 温度敏感特性 纳米纤维膜 聚(N-异丙基丙烯酰胺)(PNIPAM) 聚乙二醇甲醚(mPEG) 

分 类 号：TQ340.64[化学工程—化纤工业] TB332[一般工业技术—材料科学与工程]