物理化学学报

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智能蜂窝状有序多孔薄膜:体系构建、响应性能及应用探索

殷鸿尧, 于跃, 李宗诚, 张港鸿, 冯玉军   

  1. 四川大学高分子研究所, 高分子材料工程国家重点实验室, 成都 610065
  • 收稿日期:2019-04-10 修回日期:2019-05-14 录用日期:2019-05-15 发布日期:2019-05-22
  • 通讯作者: 殷鸿尧, 冯玉军 E-mail:hyyin@scu.edu.cn;yjfeng@scu.edu.cn
  • 基金资助:
    中国博士后科学基金(2017M623029)资助项目

Smart Honeycomb-Patterned Porous Films: Fabrications, Responsive Properties, and Applications

Hongyao Yin, Yue Yu, Zongcheng Li, Ganghong Zhang, Yujun Feng   

  1. Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
  • Received:2019-04-10 Revised:2019-05-14 Accepted:2019-05-15 Published:2019-05-22
  • Contact: Hongyao Yin, Yujun Feng E-mail:hyyin@scu.edu.cn;yjfeng@scu.edu.cn
  • Supported by:
    The project was supported by the China Postdoctoral Science Foundation (2017M623029).

摘要: 蜂窝状有序多孔膜是一种典型的具有微、纳米尺寸的图案化高分子薄膜材料,在超疏水表面、光电材料、组织工程、生物医学、传感器等领域都具有良好的应用前景。表面形貌或性质具有可逆刺激响应特性的智能型多孔膜不仅拥有常规多孔膜的性能,而且还拥有独特的“开-关”功能,因此受到广泛关注。本文回顾了智能有序多孔膜近年的研究进展,重点对其体系构建、响应方式、机理、性能和相关应用进行了归纳与分析,评述了不同刺激响应多孔膜的特点及优劣势,探讨了智能多孔膜的优化设计及提高响应性能等问题,指出了目前面临的挑战,并展望了未来的发展方向。

关键词: 有序多孔薄膜, 呼吸图案法, 刺激响应, 润湿性, 形貌

Abstract: Honeycomb-patterned porous films are polymer films with regular pore arrays on their surfaces. Since the pioneering work of François et al. in 1994, in which they used the breath figure (BF) technique to prepare honeycomb films, these highly ordered porous films have been attracting increasing interest in the past decades. Researchers are interested in the well-ordered pore arrays as they show great potential for use in many areas including superhydrophobic materials, photoelectric materials, tissue engineering, biomedicine, gas sensors, micro-reactors, to name just a few. Previous studies in this area have mainly focused on the preparation of porous films with regular microstructures and the effect of polymer architecture and casting conditions (such as temperature, relative humidity, and solvents) on the morphology. During the past two decades, considerable work has been devoted to identifying the mechanism of generation of well-ordered pore arrays during the BF process. Although the exact mechanism of film formation remains unclear, highly ordered honeycomb films can be produced from various polymers or polymer blends. In other words, currently, preparation of honeycomb films is not a major challenge. More recent studies in this area have concentrated on fabricating smart honeycomb films with reversible surface morphologies and/or properties. These smart films possess not only the properties of ordinary honeycomb films but also unique "on-off" switching functions. The research on stimuli-responsive smart honeycomb films is quite interesting in terms of both fundamental research and practical applications. Theoretically, the different scales and regular pore arrays provide an ideal model for studying the surface properties of porous materials under external stimulation, which is helpful in designing structured surfaces with desirable properties. From an application perspective, the "on-off" switching behavior imparts the films with additional functions that show high potential in a wide range of applications such as cell adhesion and controlled release, protein adsorption and separation, controlled drug release, etc. Thus far, honeycomb films with stimuli-responsive reversible surface morphologies, wettability, and fluorescence spectra have been developed, and the stimulus triggers have been mainly concentrated on temperature, pH, light, solvents, and gases. The main focus of this study is to describe the recent advances in smart honeycomb films, including fabrication strategies, triggers, "on-off" switching mechanisms, responsive behaviors, and related applications. Moreover, special attention is given to discussing the advantages and disadvantages of smart honeycomb films based on different triggers and design of smart honeycomb film systems with improved response properties. This study also discusses the challenges that concern the future development of smart honeycomb films and suggests several means of addressing those challenges.

Key words: Ordered porous film, Breath figure, Stimuli-responsiveness, Wettability, Morphology

MSC2000: 

  • O647