Chemical Research in Chinese Universities ›› 2021, Vol. 37 ›› Issue (3): 512-521.doi: 10.1007/s40242-021-1103-9

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Preparation of Photoresponsive PAN-NH2@EPESP Fiber Films with Mechanical Stability for Regulating Wettability and Micro-environment Humidity

CAO Wenhao1, WANG Caifeng1, WANG Shuai1, ZHANG Yang2, ZHAO Ruisheng1   

  1. 1. Inner Mongolia Key Laboratory of Green Catalysis, College of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhhot 010022, P. R. China;
    2. Inner Mongolia Key Laboratory of Environmental Chemistry, College of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhhot 010022, P. R. China
  • Received:2021-03-13 Revised:2021-04-16 Online:2021-06-01 Published:2021-05-31
  • Contact: WANG Shuai, ZHAO Ruisheng E-mail:wangshuai@imnu.edu.cn;zhaoruisheng@126.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.51963017, 51503106), the Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region, China(No. NJYT-20-B28), the Fund of the Collaborative Innovation Center for Water Environment Security of Inner Mongolia Autonomous Region, China(No. XTCX003) and the Research Project of Higher School, Department of Education of Inner Mongolia Autonomous Region, China(No. NJZY21545).

Abstract: In view of the current living micro-environment and requirements of green economy, intelligent light-responsive humidification materials have become a hot spot in intelligent polymer mate-rials. In this work, reversible photoresponsive films with a mechanical stability and an excellent humidity adjustment performance are developed by modifying epoxy-ether-spiropyran(EPESP) on amino-nanofibers(PAN-NH2), which was produced through electrospinning. Such smart films for regulating wettability and micro-environment humidity can be reversibly manipulated by the simple switch of UV and visible light irradiation because of the unique transformation between polar ring-opened status and nonpolar ring-closed status of the spiropyran units. The effects of EPESP modification amount on the morphology, wettability, tensile strength and the ability to regulate humidity were investigated in detail. The results show that with the increase of modification amount of EPESP, both the humi-dity regulation and tensile strength increased; when the modification amount exceeds 7 mg, the range of regulating humidity increases slowly.

Key words: Photoresponsive, Spiropyran, Regulating humidity, Mechanical stability, Electrospinning