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Preparation and Properties of Temperature-Responsive Janus Nanofibers |
ZHANG Jinzhong1, LIU Xiaoyun2( ), YANG Jianmao2, ZHOU Jianfeng2, ZHA Liusheng1( ) |
1.State Key Laboratory of Fiber Material Modification, School of Materials Science and Engineering, Donghua University, Shanghai 201620, China 2.Analysis and Testing Center, Donghua University, Shanghai 201620, China |
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Cite this article:
ZHANG Jinzhong, LIU Xiaoyun, YANG Jianmao, ZHOU Jianfeng, ZHA Liusheng. Preparation and Properties of Temperature-Responsive Janus Nanofibers. Chinese Journal of Materials Research, 2023, 37(4): 248-256.
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Abstract 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.
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Received: 15 November 2021
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Fund: National Natural Science Foundation of China(51373030);National Natural Science Foundation of China(51503033) |
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