高分子网络凝胶法制备纳米氧化锌的工艺控制

以乙酸锌[Zn(Ac)2]为原料,丙烯酰胺(AM)为单体,N,'N'-亚甲基双丙烯酰胺(MABM)为网络剂,采用高分子网络凝胶法制备了纳米ZnO粉体,研究了其制备过程中反应物浓度、引发剂(NH4)2S2O8含量、溶液的pH值及备反应条件对纳米ZnO晶粒尺寸的影响.X射线衍射分析结果表明:纳米ZnO颗粒的平均晶粒大小随Zn2+起始浓度引发剂含量的增加而增加,随溶液pH值的增加而减小.确定了用高分子网络凝胶法制备纳米ZnO粉体的最佳工艺参数为:反应温度80℃;反应时间2h:干燥温度100℃:干燥时间4h.

PROCESS CONTROL OF ZINC OXIDE NANO-CRYSTALLINE PREPARED BY A POLYACYLAMIDE-GEL METHOD

Nanosized ZnO powders were synthesized from zinc acetate by a polyacrylamide-gel method. Acrylamide and N,N'-methylenebisacrylamide were used in the synthesis as a monomer, and a network reagent, respectively. The effects of the parameters (such as reactant concentration, content of reaction initiator (NH)2S2O8, pH value of solvent, etc.) on the properties of the nanosized ZnO powders were investigated. The crystalline characteristics of the powders was determined by X-ray diffraction. The results indi-cate that the nanosized ZnO all belong to a hexagonal structure, and the average crystalline grain size decreases with the decreasing of reactant concentration and the reaction initiator content and increasing pH value. In addition, the synthesis process parameters can be optimized at the reaction temperature of 80℃ for 2 h and drying at 100 ℃ for 4 h.