The Preparation And Properties Research Of Hybrid Functional Coating

Coatings can protect and slow the wear of the matrix materials, which attractmore and more people’s attention. In recent years, the coatings have gradually becomea kind of multifunctional material and occupy an important position in industry. Theimportant thing we consider is the improvement of preparation conditions, productionprocess, quality and function of the coating. Among numerous coating, the organic-inorganic nanocomposite coating combining the excellent properties of organic coatingand inorganic coating has become the focus of the research in the recent decades andoccupied the dominant position in the development of the coating. So far, researchershave successfully doped the TiO2, ZrO2, SiO2, Al2O3nanoparticles into the coating andfabricated the organic-inorganic nanocomposite coating with the excellentperformance (high refractive index, high wear resistance, antireflection, hightemperature resistance, corrosion resistance, etc.), expanding the application of thecoating. In this thesis, we prepared SiO2sols by sol-gel method, and doped theinorganic nanoparticles into the mixed anti-fog coating by physical blending method,and finally the organic-inorganic nanocomposite with excellent wear-resisting andanti-fog coating properties were obtained. The work mainly included:(1) We prepared a kind of wear-resisting anti-fog coating material by sol-gelmethod. We applied the TEOS, KH560as raw materials and diacetone alcohol (DAA)as the solvent, and doped the SiO2nanoparticles into the system, and then physicallyblend with anti-fog industrial coating, and finally we prepared the thermal curingorganic-inorganic nancomposite wear-resisting anti-fog coating material. The TEOS,KH560in the system after the catalysis of acid and hydrolysis-condensation reactionformed networking structure which enhanced the toughness and wear resistance ofcoating. SiO2nanoparticles possessing high hardness, were homogeniously doped into the system by means of physical blending, which further improved the hardness andwear resistance of the coating. The size of SiO2nanoparticles doped was around10nm, and could be uniformly dispersed in the system, making the prepared coatinghave good transmittance. The prepared coating possessed good flatness, transmittanceover95%and hardness up to5H.On the basis of (1), we doped TiO2nanoparticles in the SiO2sol and made ituniformly dispersed in the system. The performance of the coating could be controlledby varying the content of TiO2nanoparticles in the system, and an optimal value wasfound. The prepared wear-resistant anti-fog coating in the experiments possessedsimple craft, low cost, good adhesion and transmittance, and more importantly itshardness and wear resistance were improved while the anti-fog performance wasunchanged.All in all, we prepared SiO2sol through simple sol gel preparation, and thendoped the inorganic nanoparticles in the system by physical blending methods. Byadjusting the content of nanoparticles, the optimum coating performance wasprepared.The coating can be widely used in construction, automobile windshields,optical materials, aerospace and other fields.