Study on the application of surface active polymers in detergents
An acrylic copolymer modified with surface active groups(HS-C)was studied.Its structural characteristics,polymer properties(chelation and anti-deposition)and surface activity(surface tension,critical micelle concentration,wettability,emulsification,foaming and detergency)were investigated.The performance of HS-C was compared with that of commonly used chelating agents,anti-redeposition agents and surfactants,respectively.The results of FT-IR showed that the main structure of HS-C was similar to that of unmodified sodium polyacrylate(PM),but with more unsaturated bonds and alcohol and/or ether groups.The experimental results showed that the chelation value of HS-C was 554.70 mg/g,which was higher than that of EDTA·4Na and GLDA·4Na but slightly lower than that of PM.Its anti-deposition performance to carbon black was close to that of commercially available anti-redeposition agent SRP,whereas PM had no anti-deposition effect to carbon black.The critical micelle concentration and equilibrium surface tension of HS-C were 0.005%and 41.85 mN/m,respectively.Its wetting and foaming properties were relatively poorer than those of LAS,AEO-9 and AES,but its emulsifying ability was better than that of low-molecular-weight surfactants.HS-C had detergency superior to LAS,and there was synergistic effect when combined with LAS,AEO-9 and AES.
surface active polymerchelationanti-depositionsurface activitymodified acrylic copolymer
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