Synthesis and Characterization of Sodium Nonylphenol Ethoxylate(10) Sulfoitaconate Esters

Two sodium nonylphenol ethoxylate(10) sulfoitaconate ester surfactants, namely disodium nonylphenol ethoxylate(10) sulfoitaconate monoester (DNE(10)SIM) and sodium nonylphenol ethoxylate(10) sulfoitaconate diester (SNE(10)SID), were synthesized through the esterification and sulfonation reactions with nonylphenol ethoxylate(10) ester, itaconic acid and sodium sulfite as the raw materials. The chemical structures of the prepared surfactants were confirmed by FTIR and H-1 NMR. The surface tension of the synthesized surfactants was measured at 25 degrees C and the surface active properties were characterized. The DNE(10)SIM had better surface activity. The CMC was 1.77 x 10(-6) mol L-1 and gamma(CMC) was 35.45 mN m(-1). The CMC and gamma(CMC) for the SNE(10)SID were 5.42 x 10(-5) mol L-1 and 37.67 mN m(-1), respectively. Moreover, the emulsification power of SNE(10)SID was better.