论文部分内容阅读
用Span20和Tween20以不同比例复配对10%辛硫磷进行乳化,发现复配乳化剂的最佳HLB值为11.5。再根据此HLB值选择出由阴离子表面活性剂和非离子表面活性剂组成的乳化剂对,确定了最佳乳化剂对。乳化剂的用量为2%,加入0.5%的助乳化剂十六醇和0.1%的增稠剂可明显提高水乳剂的稳定性。
With 10% phoxim emulsified with different ratios of Span20 and Tween20, the optimum HLB value of the complex emulsifier was found to be 11.5. Based on this HLB value, an emulsifier pair composed of anionic surfactant and nonionic surfactant was selected to determine the optimum emulsifier pair. The amount of emulsifier is 2%. The addition of 0.5% co-emulsifier cetyl alcohol and 0.1% thickener can obviously improve the stability of water emulsion.