高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (10): 2246.doi: 10.7503/cjcu20140450

• 高分子化学 • 上一篇    下一篇

原位红外光谱法研究电纺聚酰胺酸纳米纤维膜热亚胺化过程

于晓慧, 张文朋, 操建华, 蒋士冬, 吴大勇()   

  1. 中国科学院理化技术研究所, 北京 100190
  • 收稿日期:2014-05-14 出版日期:2014-10-10 发布日期:2014-09-11
  • 作者简介:联系人简介: 吴大勇, 男, 博士, 研究员. 主要从事膜材料与膜技术及大流量静电纺丝研究. E-mail: dayongwu@mail.ipc.ac.cn
  • 基金资助:
    国家自然科学基金(批准号: 21272243)和中国科学院战略性先导科技专项基金(批准号: XDA09010105)资助

Thermal Imidization Process of Electrospun Poly(amic acid) Film Studied by In-situ FTIR

YU Xiaohui, ZHANG Wenpeng, CAO Jianhua, JIANG Shidong, WU Dayong*()   

  1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2014-05-14 Online:2014-10-10 Published:2014-09-11
  • Contact: WU Dayong E-mail:dayongwu@mail.ipc.ac.cn
  • Supported by:
    Supported by the National Nature Science Foundation of China(No.21272243) and Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA09010105)

摘要:

以均苯二酐和二苯醚二胺为原料合成聚酰胺酸溶液, 通过静电纺丝法制得聚酰胺酸纳米纤维膜. 利用原位红外技术研究亚胺化进程, 并以优化的条件制得聚酰亚胺纳米纤维膜. 研究结果表明, 当升温速率为2 ℃/min时, 在350 ℃可实现100%亚胺化; 升温速率过快, 纳米纤维膜的亚胺化程度较低; 采用快速-慢速相结合的升温方法, 则可以有效地提高亚胺化效率.

关键词: 聚酰亚胺, 纳米纤维膜, 亚胺化程度, 静电纺丝, 原位红外光谱

Abstract:

Polyamic acid(PAA) solution based on 4,4'-diaminodiphenyl ether(ODA) and pyromelliticdianhydride(PMDA) was prepared and electrospun into PAA nanofiber films. In-situ Fourier transform infrared(FTIR) spectroscopy was used to study the progress of imidization. Through applying the optimized condition of imidization, a polyimide film was obtained with 100% of imidization degree. The results show that lower heating rate(2 ℃/min) leads to a 100% of imidization degree; PAA nanofiber films exhibited lower imidization degree under the faster rate. A new fast-slow heating rate method can improve the imidization efficiency.

Key words: Polyimide, Nanofiber film, Imidization degree, Electrospinning, In-situ FTIR spectrum

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