| Currently,the world is facing the severe challenges of increasingly prominent energy shortages and sharp increases in cleaning costs.The realization of multifunction on different substrates including heat insulation and self-cleaning via the regulation and control of coatings is regarded as an effective route to save energy and reduce labor costs.However,the previously-reported heat insulation self-cleaning coatings confront such problems as difficulty in achieving multifunction through single-layer film,unsatisfactory thermal insulation effects,and strong dependence on light.Thus,the following works have been carried out in the master’s thesis.Firstly,based on organic-inorganic hybrid technology,the glass-based superhydrophilic coatings with thermal insulation,antifogging and self-cleaning functions were fabricated by utilizing polyacrylic acid(PAA),polypropylene glycol(PPG),3-glycidyloxypropyltrimethoxysilane(KH-560)and nano-cesium tungsten bronze(CWO).The effects of the mass ratio of PAA/PPG,the amount of KH-560 and the weight of CWO slurry on the water contact angle(WCA),water resistance and optical properties of the coatings were systematically investigated.The antifogging stability,physical properties,self-cleaning performance,heat insulation performance and energy-saving effects of the coatings were also discussed,and finally the improvement mechanism of the water-resistance after the interaction between KH-560 and PAA/PPG was dealt with.The results indicate that compared with ordinary glass,the prepared coated glass can maximum decrease the temperature inside the box by15.8 °C under natural light irradiation and reduce the energy consumption of local cities by 18.9%(according to energy consumption simulation results).The coating exhibits superhydrophilicity with a WCA of 5.6° and retains its antifogging function after 80-time scraping with dust-free cloth and 120 days of room temperature exposure.Then,a multifunctional superhydrophobic fabric was prepared based on the organosilicon paint(F-CWO@OSR)with CWO modified by 1h,1h,2h,2hperfluorodecyltrichlorosilane(PFOTS),which displays excellent performance in nearinfrared shielding,oil-water separation and self-cleaning.The effects of hydrophobic CWO amount on the wettability and heat insulation properties of fabric were systematically explored.The mechanical resistance,superhydrophobicity stability,self-cleaning,heat insulation and oil-water separation properties of fabric were also discussed.The results demonstrate that the obtained fabric exhibits a WCA of 154.3°and a sliding angle(SA)of 7°,and maintains stable superhydrophobicity under the conditions of strong acid and alkali,50-time scratches with sandpaper,ultrasonic cleaning for 50 min,and 48-hour ultraviolet irradiation.Moreover,the fabric also displays an excellent self-cleaning property for common liquids in life(milk,tea,juice,cola).The separation efficiency of light/heavy oil is as high as 95%.Under 1 min nearinfrared light,the temperature of the space covered by the coated fabric is 9 °C lower than that of the original fabric.In summary,for the first time,based on the fact that CWO can not only strongly absorb near-infrared,but also regulate the surface microstructure and surface energy of the coating,high-performance superhydrophilic heat insulation self-cleaning coating and superhydrophobic heat insulation self-cleaning coating on glass and fabric substrates were respectively prepared by a novel and simple process to prepare,exhibiting a vast application prospect in the field of energy-saving glass and sunscreen fabrics. |
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