Synthesis And Characterization Of Sodium Nonylphenol Ethoxylate(10) Sulfoitaconate Esters

Itaconic acid derived from the biomass ramification could be substituted for the maleic anhydride which was derived from the petrochemical materials. It was benefit for cyclic utilization of renewable resources and the dependence of surfactant industry on the oil would be reduced. In this paper, the method of the synthesis of sodium nonylphenol ethoxylate(10) sulfoitaconate esters anion surfactants were described in details and the synthetic mechanism was introduced. Meanwhile, the surface active of the anion surfantants were analyzed. Moreover, with discussing the status and development of the anion surfantants,it could be concluded that they had a broad application prospects.With nonylphenol ethoxylate(10) ester, itaconic acid, sodium sulfite and concentrated sulfuric acid as the raw materials, a new type of 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 reactionsThe influence of the reaction temperature, reaction time, molar ratios of the materials and the dosage of analyst on the conversion were studied comprehensively. By the orthogonal test method to determine the optimum conditions: esterification reaction temperatures were 120℃and 130℃, reaction time were 4h, n(NPEO(10)):n(IA) were 1:1.05 and 3:1 and the dosage of concentrated sulfuric acid were 6% and 7%, respectively; sulfonation reaction temperature were 90℃, reaction time were 4h and n(IA):n(Na2SO3) were 1:1.05, respectively.Comparing with the NPEO(10), the surface tension, critical micelle concentration, emulsification power and dispersing power of the new type of anion surfactants were investigated. The results indicated that: under the optimum conditions, DNE(10)SIM had low surface tension and the lowest critical micelle concentration. ItsγCMC was 35.45 mN/m and cmc was 1.77×10-6 mol/L. While, theγCMC and cmc of the SNE(10)SID were 36.47 mN/m and 5.42×10-5 mol/L, respectively; The emulsification power of SNE(10)SID was better than that of DNE(10)SIM. Compared with NPEO(10), both of them had ordinary dispersing power. The chemical structures of the prepared surfactants were confirmed by FTIR and 1H NMR.