低成本无团聚纳米氧化锌的制造

Study on preparation of low cost,non-aggregation ZnO nanoparticales

以硫酸锌、碳酸氢铵为原料,借鉴传统的直接沉淀法生产工艺优点并进行原理性改进,开发出低成本、无团聚、产量大、粒径可控、高品质新型的纳米氧化锌生产工艺,即沉淀-分散法生产工艺.在反应前加入表面活性剂,制得无团聚表面改性的碱式碳酸锌前驱体,用含有表面活性剂的水溶液洗涤,压滤干燥,在380～550℃下保温0.5～1.5h分解制得少团聚的粒径<60nm的纳米氧化锌;然后用无水乙醇作分散介质,将纳米氧化锌球磨2h,进行分散和无团聚化处理,回收乙醇,即制得无团聚、平均粒径35.6nm纳米氧化锌.在实验的基础上分析了纳米氧化锌团聚与分散的机理.

The preparation method of ZnO nanoparticales,sedimentationdispersion method,was developed with low cost,large yield,diameter controlled,nonaggregation and high quality by drawing lessons from some of the advantages about traditional sedimentation method of zinc oxide powder and by proceeding essential improvement.By used ZnSO4,NH4HCO3 and adding surface active agent to solution before reaction into the ZnCO3·2Zn(OH)2·4H2O,the forerunner of ZnO,was prepared with nonaggregation.After the forerunner washed by water with surface active agent,filtered and dried,heated 0.5-1.5?h at 380-550℃,the ZnO nanoparticales was made with less aggregation and diameter smaller than 60?nm.The ZnO nanoparticales with nonaggregation, average diameter 35.6?nm was manufactured by grinding the less aggregative ZnO nanoparticales two hours with alcohol.On the basis of experiments,the principles of aggregation and dispersion of ZnO nanoparticales were analyzed.