Application properties of the mixed system of AEC and a quaternary ammonium salt with multiple cationic sites
A quaternary ammonium surfactant(TC-GS)containing multiple cationic sites was mixed with sodium fatty alcohol polyoxyethylene ether carboxylate(AE9C)in different ratios,and the wetting,detergency,emulsification,antistatic and activated-carbon-dispersing properties of the mixed systems were tested.The results showed that the TC-GS/AE9C system was homogeneous and transparent solution at different mixing ratios,indicative of excellent compatibility and stability.The mixed system showed better wetting ability for canvas cloth than single surfactant,with the best wetting performance at αTC-GS of 0.4.The mixed surfactants showed synergistic effect in the process of emulsifying liquid paraffin.The AE9C solution had good detergency for both carbon-black-stained cloth and grease-stained cloth,but the detergency was decreased after mixed with TC-GS,probably due to the adsorption of TC-GS on the surface of stained cloths,which hindered the washing and stripping of stains.Both TC-GS solution and the solution of TC-GS/AE9C system exhibited good antistatic performance and could reduce the surface resistance of polyester fabric to≤1010 Ω.The TC-GS/AE9C system at most mixing ratios had good ability to disperse activated carbon;however,when the mixing ratio was consistent with the theoretical isoelectric molar ratio,the mixture had poor dispersion stability for activated carbon.
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