不同分散剂对纳米分散性能的影响 -

以均匀沉淀法制备的纳米ZnO为原料,无水乙醇为溶剂,研究了超声时间、超声温度和聚乙二醇(2000)对纳米ZnO分散性能的影响。结果表明:聚乙二醇(2000)的最佳反应条件:超声时间70 min,超声温度20℃,分散剂用量0.6 mL。最后分别以聚乙二醇(6000)、聚乙二醇(4000)和聚乙二醇(2000)为分散剂,研究了分散剂种类对纳米ZnO分散性能的影响,结果表明:不同分散剂对纳米ZnO分散性能不同,聚乙二醇(6000)具有较好的空间位阻效应,其分散性能最好,其次为聚乙二醇(4000),聚乙二醇(2000)分散效果最差。 Taking nano-ZnO as raw material,which is prepared with uniform precipitation method,anhydrous ethanol as solvent,analyse the influence of ultrasonic time,ultrasonic temperature and the amount of PEG(2000) on dispersibility of nano-ZnO.The optimum reaction conditions for PEG(2000) is that the ultrasonic time is 70 minutes,the ultrasonic temperature is 20 ℃,the amount of dispersant is 0.6 mL.Using PEG(6000),PEG(4000) and PEG(2000) as dispersing agent,study the influence of dispersing agent type on dispersibility of nano-ZnO.The results show that,PEG(6000) could disperse nano-ZnO well due to its better steric effects,followed by PEG(4000),the dispersion effect of PEG(2000) is the worst