有机硅季铵盐的合成及其在洗护领域中的应用OA北大核心CSTPCD

Silicone quaternary ammonium salts were synthesized by the ring-opening reaction between N,N-dimethyl-dodecyl amine and epoxy polyether modified silicone oils of different molecular weights.The molecular structure of products of silicone quaternary ammonium salts were characterized by FT-IR.The bacteriostatic effects of these silicone quaternary ammonium salts with different molecular weights,as well as some commercial samples and the cotton fabrics treated by them,were investigated.The Zeta potential of fabric surface treated by the single solution and the softener containing quaternary ammonium salt was also studied.The fabric-softening effect in softener and the anti-redeposition effect in detergent were studied for silicone quaternary ammonium salt.The results showed that the synthesized silicone quaternary ammonium salt had excellent bacteriostatic effect with antibacterial rate above 99.9%at a dosage as low as 0.1%(w/%).The Zeta potential of treated fabric was increased due to the adsorption of silicone quaternary ammonium salt.A solution of merely 1%silicone quaternary ammonium salt(MW 5 000)was able to change the surface of cotton fabric from negatively charged to positively charged,which was much better than that of the commercial samples.Moreover,the synthesized silicone quaternary ammonium salt showed significant softening effect in softener system and good anti-redeposition effects against carbon black and yellow soil in the detergent system.The anti-redeposition effect on cellulose fabric was better than that on polyester fabric.