纳米二氧化钛的分散及对氟碳涂料的改性

Dispersion of nano-TiO2 and modification of fluorocarbon paint

由于纳米颗粒在涂料中不易分散,所以解决其在涂料中的分散问题,是纳米颗粒在涂料中应用的关键。本文以提高纳米二氧化钛在氟碳涂料中的分散性为目的,从物理机械分散和表面改性两个方面,分别讨论了纳米二氧化钛在氟碳涂料中分散的影响因素。结果表明,加入731A、吐温?80及Tritonx?100分散剂,机械分散6 000 r/min、60 min,超声分散30 min等,可以提高纳米二氧化钛在氟碳涂料中的分散性能。同时,纳米二氧化钛的加入,改善了氟碳涂料耐玷污和耐洗刷性能。

Dispersion of nano-particles in paint was studied. In order to enhance the dispersion of nano-particles in the fluorocarbon paint, the influence factors of dispersion stability of nano-TiO2 in the fluorocarbon paint were discussed in terms of the physical, mechanical and surface modification principles. The experiment results indicated that the dispersion of nano-TiO2 in the fluorocarbon paint could be improved by adding 731A, Tween-80 and Tritonx-100 etc and by mechanical dispersing at 6 000 r/min and 60 min, ultrasonic dispersing 30 min etc. At the same time, the anti-contamination and anti-washing performance of the nano-TiO2 fluorocarbon paint were improved.