• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (3): 186-193.doi: 10.3901/JME.2022.03.186

• 摩擦学 • 上一篇    下一篇

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膜厚对热处理聚二甲基硅氧烷薄膜表面润湿性的影响

陈荣昕1, 张炜2, 孙魏1, 叶家鑫1, 刘小君1, 刘焜1   

  1. 1. 合肥工业大学摩擦学研究所 合肥 230009;
    2. 福建工程学院机械与汽车工程学院 福州 350118
  • 收稿日期:2021-04-19 修回日期:2021-08-29 出版日期:2022-02-05 发布日期:2022-03-19
  • 通讯作者: 刘焜(通信作者),男,1963年出生,博士,教授,博士研究生导师。主要研究方向为表面摩擦学。E-mail:liukun@hfut.edu.cn
  • 作者简介:陈荣昕,女,1994年出生,博士研究生。主要研究方向为界面润湿。E-mail:chenrongxin@mail.hfut.edu.cn
  • 基金资助:
    国家自然科学基金(51875152,51875153,51975174)和福建省自然科学基金(2020J01869)资助项目。

Influence of Film Thickness on Surface Wettability of Heat Treated Polydimethylsiloxane Films

CHEN Rongxin1, ZHANG Wei2, SUN Wei1, YE Jiaxin1, LIU Xiaojun1, LIU Kun1   

  1. 1. Institute of Tribology, Hefei University of Technology, Hefei 230009;
    2. School of Mechanical & Automotive Engineering, Fujian University of Technology, Fuzhou 350118
  • Received:2021-04-19 Revised:2021-08-29 Online:2022-02-05 Published:2022-03-19

摘要: 针对聚二甲基硅氧烷(PDMS)薄膜润湿性这一重要表面特性,通过旋涂法制备不同厚度PDMS薄膜,通过接触角测量、表面形貌观测、薄膜厚度分析、红外化学光谱分析等方式对热处理前、后PDMS薄膜表面润湿性及其物理、化学状态进行表征分析,探究膜厚因素对最终热处理后PDMS薄膜润湿特性的影响机理。研究表明,不同厚度状态下热处理后H-PDMS薄膜表面具有亲水-疏水-超疏水-超亲水的润湿状态差异;同时,从表面形貌变化、截面厚度变化及化学键等物理、化学层面分析表明SiO2颗粒的生成及SiO2颗粒粒径大小和颗粒之间的堆叠状态变化可对膜厚差异导致热处理后H-PDMS薄膜润湿性不同做出良好解释。本研究为进一步剖析PDMS薄膜润湿特性提供理论基础,并为通过控制PDMS薄膜厚度从而实现其热处理后润湿状态调控提供方法指引。

关键词: 聚二甲基硅氧烷(PDMS), 润湿, 膜厚, 表面形貌, 光谱分析

Abstract: Aimed at the surface wettability of polydimethylsiloxane (PDMS) film, which is the important surface characteristic, PDMS films with different thickness are prepared by spin coating method. The surface wettability, physical characteristics and chemical characteristics of PDMS films before and after heat treatment are analyzed by contact angle measurement, surface morphology observation, film thickness analysis and infrared chemical spectrum analysis. The influence of film thickness on the wettability of heat treatment PDMS film is explored. The results show that the surface of H-PDMS films has different wettability states, including hydrophilic, hydrophobic, superhydrophobic, and superhydrophilic. Moreover, the physical and chemical analysis of surface morphology, cross-section thickness and chemical bonds show that the formation of SiO2 particles, the change of SiO2 particle size, and the change of stacking state of SiO2particles can cause the difference of wettability of H-PDMS films. This study would provide a theoretical basis for further investigation on the wettability characteristics of PDMS films, and can provide a method guide for changing the wettability of heat treated PDMS films by controlling the thickness of PDMS films.

Key words: polydimethylsiloxane(PDMS), wettability, film thickness, surface topography, FTIR

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