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研究了一种纳米成膜分散液的制备方法,探讨了超声作用对悬浮液分散稳定性的影响。实验结果表明,对纳米TiO2-水体系进行长时间超声强烈振荡(8h以上),对粒子在水中的分散起决定性作用,超声分散经历3个重要阶段:初级分散(超声2h左右),逆分散(3~5h),完全分散(8h以上);所制得的成膜液分散稳定性及光催化性能优异;用该成膜液制备纳米TiO2薄膜,所制得的薄膜具有优良光催化性能,以及耐热、耐水、耐腐蚀性、界面粘结性能和耐老化性能。
The preparation method of a nano-film-forming dispersion was studied, and the influence of ultrasonic action on the dispersion stability of the suspension was discussed. The experimental results show that the nanosized TiO2-water system undergoes strong ultrasonic oscillations (above 8h) which play a decisive role in the dispersion of the particles in water. The ultrasonic dispersion undergoes three important stages: primary dispersion (ultrasound 2h), reverse dispersion 3 ~ 5h), completely dispersed (more than 8h); the obtained film-forming solution is excellent in dispersion stability and photocatalytic performance; the nano-TiO2 film is prepared by using the film forming solution, the prepared film has excellent photocatalytic performance, Heat, water, corrosion resistance, interfacial adhesion and anti-aging properties.