PDMS薄膜表面有机硅耐磨涂层的制备研究

Preparation of Organosilicone Anti-Wear Coating on PDMS Membrane

为了提高聚二甲基硅氧烷(PDMS)薄膜表面的硬度和耐磨性,进一步拓展微流控材料的应用,提出了以甲基三甲氧基硅烷(MTMS)和苯基三甲氧基硅烷(PTMS)为主要原料,在PDMS薄膜表面制备有机硅耐磨涂层的方法。同时,加入具有增韧效果的丙烯酸甲酯溶胶和HCl催化剂等原料,测试了不同组分对涂层耐磨性、硬度、附着性、光学透光性及耐高温性等特性的影响,优化了涂层中各组分之间的配比。结果表明:制备的有机硅耐磨涂层可以有效提高PDMS薄膜表面的硬度、耐磨性及耐高温冲击性等性能,与PDMS基底之间的附着性良好,且在可见光区有一定的增透作用,有效改善了PDMS薄膜的表面特性。

In order to improve the hardness and anti-wear property of Polydimethylsiloxane (PDMS) membrane,as well as to further expand the applications of microfluidic materials,the preparation method of organosilicone anti-wear coating on PDMS membrane was developed with Methyltrimethoxysilane (MTMS) and Phenyltrimethoxysilane (PTMS) as the main materials. Meanwhile,other materials such as methylacrylate sol with toughening effect and HCl catalyst were also added. The effects of different components on anti-wear property,hardness,adhesion,optical transmittance and high temperature resistance of the coating were tested,the ratio of each component in the coating was optimized.Results showed that the fabricated organosilicone anti-wear coating effectively improved the anti-wear property,hardness and high temperature resistance of PDMS membrane,which showed good adhesion with PDMS substrate and high transparency in visible light region. Therefore,the surface properties of the PDMS membrane were significantly enhanced.