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以乙烯基三乙氧基硅烷(vinyl triethoxy silane,VTES)为表面改性剂,对锑掺杂氧化锡(antimony doped tine oxide,ATO)纳米粉体进行表面改性制得ATO隔热浆料,利用激光粒度分析、沉降法、Fourier变换红外光谱、接触角测定、热重分析研究了改性前后纳米ATO浆料的分散稳定性及其表面改性机理,并采用紫外-可见光谱分析了该ATO透明隔热涂膜在紫外-可见-红近外光波段的透过率。结果表明:经VTES表面改性后,ATO浆料的分散性及稳定性明显改善,浆料中ATO粒子的平均粒径由改性前的221.0nm降至121.1nm,静置24h后相对沉降高度仍达96.3%;制成透明隔热涂料后,涂膜试样在可见光区的透光性和红外光区的屏蔽能力均明显提高。
ATO thermal insulation slurry was prepared by surface modification of antimony doped tantalum oxide (ATO) nanoparticle with vinyl triethoxy silane (VTES) as surface modifier. The dispersion stability and surface modification mechanism of nano-sized ATO slurry before and after modification were studied by means of laser particle size analysis, sedimentation method, Fourier transform infrared spectroscopy, contact angle measurement and TG analysis. The UV-Vis spectra of the ATO Transparent thermal barrier coating in the ultraviolet - visible - red near the outer band of light transmittance. The results showed that the dispersibility and stability of ATO slurry were significantly improved by surface modification of VTES. The average particle size of ATO particles in the slurry decreased from 221.0nm to 121.1nm and the relative sedimentation height after standing for 24h Still up to 96.3%; made of transparent insulation coating, the coating film in the visible light transmittance and infrared light shielding capacity were significantly improved.