论文部分内容阅读
以硅溶胶为硅源,采用聚丙烯酰胺作为结构导向试剂,反相悬浮聚合法制备了介孔二氧化硅微球。控制引发剂过硫酸钾、交联剂N,N-亚甲基双丙烯酰与单体丙烯酰胺的加入量,获得球形度以及分散性较佳的聚丙烯酰胺复合二氧化硅微球。焙烧去除聚丙烯酰胺模板后得到的二氧化硅微球通过光学显微镜、红外光谱FT-IR、X-射线衍射以及氮气吸附脱附等手段进行了表征,证明聚丙烯酰胺在制备中起到了良好的结构导向作用,获得的二氧化硅微球的比表面积为240m2/g,孔径均匀分布于9nm左右,孔容度为0.3cm3/g。该方法可以通过改变转速的方法控制硅球的粒径。
Using silica sol as silica source and polyacrylamide as structure-oriented reagent, mesoporous silica microspheres were prepared by reversed-phase suspension polymerization. Control initiator potassium persulfate, crosslinking agent N, N-methylene bisacrylamide and monomer acrylamide added to obtain the degree of sphericity and better dispersion of polyacrylamide composite silica microspheres. The silica microspheres obtained by calcination and removal of polyacrylamide template were characterized by optical microscope, FT-IR, X-ray diffraction and nitrogen adsorption and desorption, which proved that polyacrylamide played a good Structure-oriented effect, the obtained silica microspheres has a specific surface area of 240 m2 / g, a uniform pore size distribution of about 9 nm and a pore volume of 0.3 cm3 / g. This method can control the diameter of the silicon ball by changing the speed.