PNIPAm温敏纳米纤维膜:交联作用下的形貌稳定性和响应行为  

PNIPAm Thermo-Responsive Nanofibers Mats:Morphological Stability and Response Behavior under Cross-Linking

作　　者：田晓靖 黄至纯 张青松[1,4] 王旭 杨宁 邓南平[3] Xiaojing Tian;Zhichun Huang;Qingsong Zhang;Xu Wang;Ning Yang;Nanping Deng(School of Materials Science and Engineering,Tiangong University,Tianjin 300387,China;State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin 300387,China;School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;Yantai Nanshan University,Yantai 265706,Shandong Province,China;Lining(China)Sports Goods,Co.,Ltd.,Beijing 100000,China)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387 [2]分离膜与膜过程国家重点实验室,天津300387 [3]天津工业大学纺织科学与工程学院,天津300387 [4]烟台南山学院,山东烟台265706 [5]李宁(中国)体育用品有限公司,北京100000

出　　处：《物理化学学报》2024年第4期52-67,共16页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(52173060);中国纺织工业联合会科技指导性项目(2018034);山东省自然科学基金(ZR2022ME095);天津工业大学纤维研究基金(TGF-21-B5);天津工业大学医工结合科研计划课题(2021YGJHLX03)资助。

摘　　要：聚N-异丙基丙烯酰胺(PNIPAm)交联温敏纳米纤维膜作为一种相变温度易于控制的新兴响应性材料,克服了传统PNIPAm块状水凝胶的生产成本高、响应速率慢和PNIPAm非交联温敏纳米纤维耐水性差的缺点,受到广泛研究并应用于智能开关、温度致动器、水油分离、药物、细胞控制释放和伤口敷料等领域。形貌稳定性和快速响应性是温敏纳米纤维膜在重复体积变化过程中最大的挑战,同时也作为评价PNIPAm温敏纳米纤维膜的实用性最重要指标引起了人们广泛的关注。本文全面综述了PNIPAm温敏纳米纤维膜近二十年来国内外的突破性进展和非交联作用下PNIPAm温敏纳米纤维膜的形貌变化和响应性,重点综合分析了物理和化学交联中交联反应类型、交联度、交联时间和交联分子量对PNIPAm温敏纳米纤维膜的形貌稳定性和响应行为的影响,为之后纤维膜的交联处理提供了理论支持,并对PNIPAm温敏纳米纤维膜的发展及应用前景进行了展望。Since 2004,poly(N-isopropylacrylamide)(PNIPAm)cross-linked thermoresponsive nanofibers mats have emerged as a responsive material with a phase transition temperature that can be easily controlled.These mats overcome the limitations,such as a high production cost and slow response rate,of huge traditional PNIPAm hydrogels.They also overcome the poor water resistance of PNIPAm noncross-linked thermo-responsive nanofibers and,thus,have been widely studied.In 2017,continuous PNIPAm thermo-responsive nanofibers in pure aqueous solvents without beads were fabricated,which began the ecological and water-based era of uniform PNIPAm nanofiber production.In this review,we comprehensively analyzed the effects of physical and chemical cross-linking reaction types,cross-linking degree,cross-linking time,and cross-linking molecular weight on the morphological stability and response behavior of PNIPAm thermo-responsive nanofibers mats,providing theoretical support for their future crosslinking treatment.Because of their high specific surface area and porosity,PNIPAm thermo-responsive nanofibers mats are vulnerable to solvent erosion before cross-linking,which damage their morphology and reduce response rates and usage times.Increased water resistance and can be utilized repeatedly,by introducing cross-linking groups to these mats,such as in drug release,cell culture,drivers,and smart switches.Chemical cross-linking are more stable than physical cross-linking and can be divided into crosslinkers,chemical reactive cross-linking,and other cross-linking.The crosslinking networks produced by a cross-linking agent are more robust;however,the resulting nanofibers mats are not applicable to the human body owing to the small,non-degradable harmful molecules,such as formaldehyde and glutaraldehyde(GA).Random 3D networks generated by physical cross-linking are easier to break but relatively safe and pollution-free.The morphological stability and response behavior of PNIPAm thermo-responsive nanofibers mats are affected by the cross-linkin

关 键 词：聚N-异丙基丙烯酰胺 纳米纤维膜 形貌稳定性 响应性 耐水性 

分 类 号：O647[理学—物理化学]