Abstract: 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.

摘要： 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。