| Summary: | 碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 106 === Cesium-tungsten oxide(Cs0.33WO3) nanoparticles have good near-infraed absorption capability and are often used in insulation material. Due to Cs0.33WO3 is easily agglomerated, silane-modified Cs0.33WO3 was used to improve above problem. However, silane-modified Cs0.33WO3 can only disperse in polar (water) or non-polar (toluene) solvent, and that limit its applications.
In this study, the amphiphilic polymers were prepared by the nitroxide mediated polymerization. First, the macroinitiator of 2-Ethylhexyl acrylate (2-EHA) was polymerized, and then amphiphilic polymer was synthesized by adding hydrophilic monomers (N-vinyl pyrrolidone,N-VP). Finally, amphiphilic cerium tungsten oxide(ACTO) particles were achieved by polymerization of amphiphilic polymer with 3-(trimethoxysilyl) propylmethacrylate (MPS) modified Cs0.33WO3 particles. The storage stability of ACTO and the thermal insulation of ACTO coating were discussed.
The experimental results showed that on the condition of the ratio of macroinitiator and hydrophilic monomers is 3:10, ACTO can dispersed in polar solvents for above 7 days, non-polar solvents for 3 days and acrylic latex above 4 days. After 30 minutes of irradiation from a simulated solar light source, the temperature of ACTO coating could decrease from 40.3°C to 37.4°C.
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