Study On The Mixed Systems And Applied Properties Of Surfactants

This dissertation studied the properties of mixed systems of a double-hydrophilic anionic surfactan(tMADS)and a quaternaryammonium-typecationic surfactan(tK3),and AEO9 was added into this mixed system to study the feasibility of the non-ideal ternary mixture theory to explain the synergism in system containing two kinds of surfactant.Furthermore,the properties of mixed systems of Methyl Ester Sulfonate(MES) and some other kinds of surfactants,and one sort of concentrated liquid detergent was developed.The MADS /K3 mixed systems displayed strong interaction between the two kinds of surfactant and showed great synergism.The strongest synergisms took place when the molar fraction of K3 was 0.7.The results show that when the molar composition of AEO9 was about 0.4 in the new mixed system(C-K-AEO9), the surface activity showed a maximum. The non-ideal ternary mixture theory could satisfy the theorical conditions of the ability of micellization and the efficiency of surface tension reduce but not the ability of surface tension reduce.The properties of MES/ AEO9,MES/ LAS,MES/ K3 mixed systems were studied at 298K and 318K,detected that the surface active of them were enhanced a lot. The strongest synergisms of MES/ AEO9 mixed systems took place when the molar fraction was 0.7,and the MES/ K3 and MES/ LAS was 0.7,0.1 respectively.All these results layed a theory base for the low and high-temperature washing in use of detergent containing anyone of these systems.The applied properties of the mixed systems were measured,which improved a lot because of the synergisms.On the base of the study of theory and applied properties of these systems,one kind of concentrated liquid detergent was developed,which contained more than 60% sufactant.It had powerfull ability for decontamination,anlistatigation,sterilization as well as stability.