The invention discloses a method for preparing self-cleaning
fluorocarbon paint, belonging to the technical field of coatings. The method disclosed by the invention comprises the following steps: mixing hydrolytic fluorosilane and
titanium dioxide, and dispersing at high speed to obtain surface-modified
titanium dioxide nano-particles; and mixing
varnish and carbon nano-tube dispersion, and micro-curing, thereby obtaining the self-cleaning
fluorocarbon paint. The
binding effect between the
titanium dioxide particles and
fluorocarbon resins is increased by the fluorosilane, fluorosilane molecules are hydrolyzed under acidic conditions, the hydrolyzed fluorosilane molecules are adsorbed onto the surfaces of the
titanium dioxide nano-particles due to
hydrogen-bond interactions, and since carbon chains in the fluorosilane molecules are protected by a
fluorine atom space
barrier effect, other atoms difficultly intrude. Therefore, the fluorosilane has excellent
chemical stability and low surface free energy. Due to a
coating layer on the fluorosilane surface, Vander Wale force of the TiO2 nano-particles to water and the
hydrogen-bond interaction are reduced, and the
contact angle on thecoating surface is greatly enlarged, so that super-hydrophobicity is achieved, the
stain resistance can be obviously improved, and the application prospects are wide.