防雾自清洁超亲水涂层的制备与表征OA

The study proposed a facile non-calcination method for preparing a superhydrophilic coating via thermal curing at a low temperature(100℃)for 2 h.A functional coating was first prepared by the reaction of tannic acid(TA)with polyethyleneimine(PEI),and the optimal ratio was determined through proportion optimization.The coating was then synergistically modified by nano-SiO2 generated from the hydrolysis of tetraethyl orthosilicate(TEOS)and hydrolyzed γ-aminopropyltriethoxysilane(KH550).The as-prepared coating solution was sprayed onto glass slides and subsequently thermally cured at 100℃for 2 h to obtain the superhydrophilic coating.The introduction of nano-SiO2 enhanced the surface roughness and mechanical strength of the coating.The incorporation of KH550 enabled nano-SiO2 to be chemically bonded with TA-PEI,which significantly improved the coating stability.The surface morphology,optical properties,and mechanical properties of the coating were characterized through multiple functional tests.The results showed that the water contact angle of the glass slide coated with this coating decreased to 5°,and the membrane stability was significantly enhanced after the addition of KH550.The coating also exhibited favorable anti-fog,self-cleaning,and light transmittance properties.Moreover,the abrasion resistance of this coating was significantly improved compared with that of the conventional SiO2 coating,demonstrating promising application prospects.