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生物模板法与溶胶凝胶技术的结合是实现无机中空微球材料快捷、高效制备的有效途径。本研究利用油菜花粉为模板,以正硅酸四乙酯为前驱体,通过溶胶-凝胶包裹的方法制备了二氧化硅中空微球。通过将二氧化硅溶胶吸附到花粉颗粒表面形成包裹层,再经过烧结处理将花粉模板去除的方法,可以方便地制备表面有一定特殊形貌的二氧化硅中空微球材料。利用扫描电子显微镜,电子能谱仪以及傅里叶变换红外光谱对花粉颗粒和所制备的二氧化硅中空微球进行表征。结果表明:利用花粉颗粒为模板,结合溶胶-凝胶方法可以成功制备具有特殊表面结构的无机中空微球材料,在这一过程中,物理吸附作用是主要的影响因素。
The combination of biological template method and sol-gel technology is an effective way to realize the efficient and efficient preparation of inorganic hollow microspheres. In this study, we used rape pollen as template and tetraethyl orthosilicate as precursor to prepare silica hollow microspheres by sol-gel method. By adsorbing silica sol onto the surface of the pollen grains to form a coating layer and then removing the pollen template through sintering, the silica hollow microsphere material with a special surface morphology can be conveniently prepared. The pollen grains and the prepared silica hollow microspheres were characterized by scanning electron microscopy, electron spectroscopy and Fourier transform infrared spectroscopy. The results show that the inorganic hollow microspheres with special surface structure can be successfully prepared by using pollen grains as template and sol - gel method. In this process, the physical adsorption is the main influential factor.