【作者】 吴军；

【导师】 郭佃顺； 律微波；

【作者基本信息】 山东师范大学 ， 有机化学， 2011， 硕士

【摘要】 氟化聚硅氧烷材料于20世纪中期,在国外开始推广应用,现在船舶、航天及合成橡胶等领域应用潜力巨大。与普通聚硅氧烷相比,氟化聚硅氧烷具有表面能低、耐溶剂性好等特点,在新型涂料中获得重要应用。本论文以含氢聚硅氧烷、不同含氟丙烯酸酯、乙烯基硅烷偶联剂为原料,通过硅氢加成反应对聚硅氧烷进行侧链改性,合成了氟化改性聚硅氧烷。利用氟化改性聚硅氧烷,通过溶胶-凝胶技术制备了一系列不同配比的疏水、疏油有机/无机杂化材料,然后将其涂于玻璃表面形成自清洁涂层,并对此类涂层进行了全面的性能测试,达到了预期的效果。本论文主要内容如下:1、综述了近年来氟化聚硅氧烷材料的设计、合成,基于含氟(甲基)丙烯酸酯改性有机硅双疏涂料的研究进展。2、利用不同含氟丙烯酸酯和乙烯基硅烷偶联剂,通过硅氢加成反应对含氢聚硅氧烷进行接枝改性,合成了一系列氟化改性聚硅氧烷,其结构经IR、~1H NMR证实。探讨了温度、催化剂用量、滴加方式和滴加速度等对硅氢加成反应的影响。3、采用溶胶-凝胶法,将改性聚硅氧烷制成了一系列比例不同的有机/无机杂化材料,并涂覆于玻璃表面形成自清洁涂层。初步研究了涂层的接触角、透光率、硬度和附着力等性能参数。实验结果表明,所制备的玻璃表面涂层具有良好的自清洁性能,其接触角大于110°,透光率可达90%以上。此类涂层对延长太阳能电池的使用寿命和进一步提升太阳能的利用效率具有重要意义,具有广阔的开发前景。更多还原

【Abstract】 Since the 1950s, polysiloxanes modified with fluoroalkyls were widely used in many fields such as vehicle, astronavigation, rubber and coating etc. Because of low surface tension, water-repellent and oil-repellent properties of polysiloxanes modified with fluoroalkyls, they can be potentially applied as hydrophobic self-cleaning coating on the solar cell glass. So we have synthesized a series of hydro-oleophobic dopes by a combination of the hydrosilylation and sol-gel method, using hydrogen-containing polysiloxanes, fluorinated acrylates, and vinylsilane.In the first part, we have synthesized a series of fluoroalkylpolysiloxanes via the hydrosilylation reaction, using hydrogen-containing polysiloxanes as starting materials, various fluorinated acrylates as modified monomers, and vinylsilane as coupling agent. The reaction conditions involving temperature, amount of catalyst, methods of adding materials were optimized. The fluoroalkylpolysiloxanes prepared were characterized by IR and ~1H NMR spectra.In the second part, a series of hydro-oleophobic dopes with varied mole ratios were prepared using the sol-gel method, and then coated on the surface of the glass forming hydrophobic self-cleaning coatings. The properties of these coatings were studied including the contact angle, light transmittance, hardness as well as adhesion. The test results show that these hydrophobic self-cleaning coatings possess big contact angles, good light transmittance, hardness and adhesion. Such hydro-oleophobic self-cleaning dopes are suitably used in the solar cell glass, as well as other fields.更多还原