PICA法制备用于高效液相色谱的锆胶基质柱填料

The methods for producing inorganic particles with a narrow particle size distribution, which are useful as chromatographic packing materials for high performance liquid chromatography（HPLC）, are provided. These methods are based on improvements in the polymerization induced colloid aggregation（PICA） process described. These improved methods involved both synthesis of zirconium oxide colloid and sintering method. Colloid is an important factor in the PICA process. The reaction factors of the aqueous sol colloid of zirconium oxide are studied. We use sintering procedure to sinter zirconium oxide colloid, the average particle size is 5 μm. Owing to different sintering procdure, the average pore size is between 7.0 32 nm and the average surface area is between 4487 m 2/g. [WT5HZ]

PICA法合成介孔二氧化硅研究

以硅酸钠为硅源,在酸性条件下,通过尿素和甲醛的缩聚反应,用诱导聚合胶体团聚法(PICA)制备出单分散脲醛/SiO2复合微球,并经高温煅烧制得介孔二氯化硅。通过X射线衍射(XRD)、氮气脱吸附、透射电镜(TEM)和高分辨透射电镜(HRTEM)等手段对介孔二氧化硅进行了表征。结果表明,通过PICA法制得的介孔二氧化硅有序性好,孔径较大、孔壁较厚、孔径分布均匀。

PICA法制备多孔二氧化硅

利用聚合诱导胶体凝聚(PICA)法,以硅溶胶为原料,制备出粒径分布均匀的多孔SiO2微球。讨论了该微球的形成机理,并采用XRD、扫描电镜和红外图谱表征了多孔SiO2微球。

PICA法制备多孔二氧化锆微球的初探

对聚合诱导胶体聚集法 (PICA )合成用作 HPL C色谱柱填料基质的多孔二氧化锆微球进行了初步的探索和研究。采用 PICA法制备二的氧化锆微球的物理和化学稳定性高 ,粒径分布较窄 。

利用聚合诱导胶体凝聚法制备中孔钛胶的研究

以钛酸丁酯为原料,利用聚合诱导胶体凝聚法(polym erization-induced colloid aggregation,PICA)合成了可供高效液相色谱(HPLC)使用的窄孔径和粒径分布的微米级中孔钛球。探索了以钛酸丁酯为原料制备胶体的方法和条件,考察了温度、溶液pH值、尿素和甲醛浓度对树脂微球成球的影响。同时对树脂微球的煅烧条件进行了考察。最终制备出适用于HPLC的平均粒径为3.5μm,平均孔径为18.9 nm,比表面积为9.6m2/g的二氧化钛填料。