用羟基纤维素(HPC)作为添加剂,用溶胶-凝胶法制备了二氧化钛薄膜,并研究了HPC对二氧化钛薄膜微观结构的影响机理.对二氧化钛凝胶的红外分析说明HPC通过锚固作用,吸附在二氧化钛胶体的表面,高分子之间的作用决定二氧化钛在溶胶中的分布,从而影响二氧化钛的微观结构.扫描电镜(SEM)和透射电镜(TEM)的研究表明,在本实验研究范围内,HPC的加入量为4.5×10-3g/g时,HPC达到饱和吸附量,二氧化钛的颗粒尺寸最小,分散性也最好.
Sol-gel-derived TiO2 colloid films were prepared with various amount of hydroxypropy-lcellulose (HPC) as additive. The function mechanism of HPC on the microstructure of titania films was studied. FRIR analysis shows that HPC anchors on the surface of titania colloid. The action between the polymers decides the distribution of titania colloid in the solution. Scanning electrical microscope (SEM) and transmitting electrical microscope (TEM) analysies show that when the concentration of HPC is 4.5×10-3g/g, the adsorption of HPC on titania colloid reaches its fitting amount, the titania colloid disperses well in the solution and the particle size of titania is smallest.
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