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Fabrication of ordered porous films from soluble polyimide based on Breath figures
Authors: LIU Yan hua1,2, WANG Li hua2*, HAN Xu tong1
Units: 1. Laboratory of New Materials, Institute of Chemistry,
KeyWords: soluble polyimide; ordered porous films; Breath figure; self-assembly;hydrophobic surface
ClassificationCode:TQ028.8
year,volume(issue):pagination: 2013,33(4):7-11

Abstract:
 The breath figure is the method to prepare ordered porous films using condensed water droplet arrays as template which is formed by self-assembly. This method has attracted considerable attention due to its facility and the automatic removal of the condensed water droplets. The ordered porous films are successfully prepared from a soluble polyimide named BTDA-DMMDA which is synthesized from 3,3’, 4,4’-benzophenone -tetracarboxylic dianhydride (BTDA) and 4,4’-diamino-3,3’-dimethyldiphenylmethane (DMMDA). Several influencing factors on the morphologies of the ordered pores, such as different humid atmosphere, relative humidity (RH), and solid substrates, are investigated. Furthermore, the hydrophilicity of the porous film is discussed. The results indicate that the pore size, ranging from 400nm to 2μm, can be dynamically controlled by changing RH, that the hydrophilic substrates is more conducive to form ordered porous films and that the contact angle increases a lot by peeling off the porous film’s surface. The film with surface being peeled off has potential application in super hydrophobic surface.

Funds:
国际973项目(2009CB623407)和北京分子科学中心创新培育项目(CMS-PY-201220)

AuthorIntro:
刘艳花(1987-),女,山西省忻州市人,硕士,研究方向为聚酰亚胺膜的构筑及应用。*通讯联系人,E-mail:wanglh@iccas.ac.cn

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