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The purpose of this study is to research and produce water-base nano-PU paint with energy conservation, environmental
consciousness and high efficiency of heat insulation, which can be enhance the traditional PU paint for performance
improvement of heat insulation and range of application. In this study, research will be held on the two-stage synthesis
method. The SiO2 nanoparticles are added into the water-base PU paint to improve the properties of traditional PU
paint. Next, the fundamental properties of this paint, including water resistance, weather rsistance, weak acid solvent
resistance, and heat insulation rate, will be measured and analyzed, and the performance of heat insulation will be
evaluated in order to confirm the performance and practicability of the heat insulation of water-base nano-PU paint in
this study. The experimental results show that for the SiO2/W-PU composite nanopaint prepared by two-stage synthesis
method, the dispersion of SiO2 powder in the water-base PU (W-PU) paint is even. For the SiO2/W-PU nanocomposite
paint prepared by adding SiO2 powder at 8% wt. to the marketed water-base PU, the water absorption of its
experimental sample is enhanced by around 10.1 times, whereas its weak acid dissolve erosion rate is increased by 3.3
times. However, the average heat insulation rate in the thermal properties is also increased, increasing around 24.22%
for the W-PU paint without SiO2 powder.
Through the multilayered coating construction, the water-base nano-PU paint added with SiO2 powder can be used on
any facility of heat insulation, including vehicle, safety helmet, umbrella, drapes, and outer wall of building. The newly
developed water-base nano-PU paint with high thermal resistance is especially suitable for application to the shell
coating of air conditioner and cooling tower,. Due to the better thermal resistance of this nanopaint, the problems of
poor heat transfer and temperature rise of cooling water caused by direct sunlight can be improved. This is of great help
to the energy conservation of air conditioning system.
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