Study On Nonionic Surfactant Alkyl Polyglycerol Ethers

A new type nonionic surfactant dodecyl polyglycerol ethers(DPE) was synthesized and characterized.In this paper three kinds of synthesis methods were attempted. Glycidol was synthesized through the reaction of 3-chloro-1,2-propanediol with alkaline compound at low temperature. Dodecyl polyglycerol ethers was prepared by glycidol and dodecanol.The side reactions were refractory.So this method makes agaist industrial production. Polyglycerol was synthezied from glycerol and ethane dichloride under the help of alkali catalyst,then nonionic surfactant dodecyl ethers polyglycerol was synthezied.This method is low cost and the reaction is simple. Polyglycerol was synthezied by glycerol, then dodecyl polyglycerol ethers was synthezied. High polymerization degree of polyglycerol was studied less.The color of high polymerization degree products is dark. With the progress of the study in the polyglycerol of high polymerization degree, the method has very broad prospects.The surface chemical properties of the products were determined.γcmc appears the lowest value at n = 2, and cmc achieves the lowest at n =2. The foaming power, the dispersing power and the solubilization capacity show the best at n = 10. The emulsifying power shows the best at n = 4.The detersive power shows the best at n=6.Dodecyl ethers polyglycerol was blended with LAS.They have preferable synergistic effect. When n(LAS)∶n(DPE)=3∶7,γcmc and cmc appear the lowest. When n(LAS)∶n(DPE)=7∶3, the foaming and wetting power appear better. When n(LAS)∶n(DPE)=5∶5, the dispersing power appear best. When n(LAS)∶n(DPE)=3∶7, the solubilization capacity and the detersive power show best.