Preparation and Properties of Temperature-Responsive Janus Nanofibers

被引：0
|
作者：
Zhang J. [1 ]
Liu X. [2 ]
Yang J. [2 ]
Zhou J. [2 ]
Zha L. [1 ]
机构：
[1] State Key Laboratory of Fiber Material Modification, School of Materials Science and Engineering, Donghua University, Shanghai
[2] Analysis and Testing Center, Donghua University, Shanghai
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2023年 / 37卷 / 04期
基金：
中国国家自然科学基金;
关键词：
composite; curling upon temperature rising; Janus nanofibers; side-by-side electrospinning process; temperature-responsiveness; ultraviolet light radiation;
D O I：
10.11901/1005.3093.2021.637
中图分类号：
学科分类号：
摘要：
A temperature-responsive polymer was synthesized by co-polymerization of N-isopropylacrylamide and acryloyloxybenzophenone. Meanwhile, poly(vinyl alcohol) (PVA) was modified by glycidyl methacrylate. Taking the synthesized polymer and the modified PVA as fiber-forming precursor reagents, of which spinning solutions were then prepared, respectively as the raw materials for producing fiber. Finally, the temperature-responsive Janus nanofibers were fabricated by side-by-side electrospinning under UV irradiation. Scanning electron microscope and transmission electron microscope observation results show that the prepared nanofibers have double-faced structure. The results of nuclear magnetic resonance spectroscopy reveal that the applied ultraviolet irradiation facilitates the formation of crosslinking structure for the double-faced nanofibers. The effect of side-by-side electrospinning process conditions on the yield and average diameter of the Janus nanofibers was investigated, it was found that the yield of the Janus nanofibers can exceed 90% when the flow rates of the two spinning solutions are less than 0.3 mL/h and the spinning voltage is lower than 22 kV. In addition, the average diameter of the Janus nanofibers can be adjusted by changing the receiving distance within a certain range. The prepared Janus nanofibers with a water-soluble polymer content (mass fraction) of less than 2% have good stability in water. When the temperature of the aqueous medium increased from 25℃ to 35℃, the prepared Janus nanofibers can transform from a stretching configuration to a curling one, and this temperature-responsiveness is reversible. © 2023 Chinese Journal of Materials Research. All rights reserved.
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页码：248 / 256
页数：8
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