高等学校化学学报

高等学校化学学报

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超疏水性聚二甲基硅氧烷膜的制备及其表面吸附性研究

金美花1, 廖明义1, 江雷2   

    1. 大连海事大学机电与材料工程学院, 大连 116026;
    2. 中国科学院化学研究所, 分子科学中心, 北京 100080
  • 收稿日期:2006-12-12 修回日期:1900-01-01 出版日期:2007-05-10 发布日期:2007-05-10
  • 通讯作者: 金美花

Preparation of Super-hydrophobic PDMS Films and Study on Surface Adhesion

JIN Mei-Hua1*, LIAO Ming-Yi1, JIANG Lei2*   

    1. College for Electromechanics and Materials Engineering, Dalian Maritime University, Dalian 110026, China;
    2. Center of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2006-12-12 Revised:1900-01-01 Online:2007-05-10 Published:2007-05-10
  • Contact: JIN Mei-Hua

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被引次数

31

摘要： 采用简单的激光刻蚀方法制备了具有类“菜花”状多级结构的粗糙聚二甲基硅氧烷(PDMS)膜, 并用CCD与高敏感性微电力学天平观察和测量PDMS表面对水的吸附情况. 结果表明, 该膜表面具有超疏水性, 同时对水滴具有超低的吸附力. 还对其表面特殊多级结构产生的机理进行了分析, 并探讨了在化学组成和表面结构对超疏水性以及吸附性产生的影响.

关键词: 超疏水性, 聚二甲基硅氧烷膜, 表面吸附力

Abstract: Cabbage-like polydimethysiliconalkly(PDMS) films were prepared via a laser cutting method. The as-prepared special “micro-submicro-nano structures” PDMS films have a very low adhesive force to water. The force is merely about 6.5 μN, and appears at the time just before the water droplet leaves the surface. The super-low adhesive force of rough PDMS surface results from the distinct decrease of the real contact area between the surface and water drop. The sliding feature is strongly affected by microstructure of surface. That rough structure induced on the surface of PDMS is due to the thermo-reaction of laser with transparent elastomer. This information is useful for the designing of bio-mimetic hydrophobic surface structure for various applications. These surfaces may provide very effective water-repellent and anti-adhesive properties against particular contamination. Such properties can greatly extend its applications to many other areas such as lost less liquid transportation without loss, and micro-pump(creating pushing-force) needless micro-fluidic devices etc..

Key words: Super-hydrophobicity, PDMS film, Surface adhesive force

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