Preparation, Property And Application Of Disodium Alkyl Diphenyl Ether Disulfonate

Surfactants are important molleculars with double affinity.By weak mutual-function force various sequencial molleculars can be self-assembled, which have multiple significant functions.Alkyl diphenyl ether sodium disulfonate(ADPODS)is a kind of multifunctional anionic surfactants with double hydrophilic groups.As a noval type of surfactants,it has attracted remarkbale attention nowadays.In this research,a series of MADS surfactants(C₈-MADS,C₉-MADS,C₁₆-MADS)were synthesized using fatty alcohol and diphenyl ether as raw materials with alkylation-sulfonation-neutralization synthetic route.The surface activity and properties of micelle aggregation system were characterized by IR and XRD method.The return-service characterstic of the binary and ternary mixed system of C₁₆-MADS and conventional surfactants were studied, including with esterquat Gemini surfantantsâ…¡-12-n(n=3,4,6)and with polyethyl eneglycol(9)mono-dodecylether(AEO₉)and dodecyldimethyl hydroxyethyl ammonium chloride(K₃),labeled by C₁₆-MADS/â…¡-12-n and C₁₆-MADS/K₃/AEO₉ respectively.The interracial tension in aqueous solution and the biodegradation of these mixed surfactants were investigated as well.1.A series of alkyl diphenyl ether were synthesized with low cost raw materials,diphenyl ether and aliphatic alcohol,catalyzed by concentrated sulfuric acid,and followed by sulfonation to produce MADS.On the basis of analysis and characterization,structure of the products was identified,effect factors of the preparation reactions were investigated and the optimum reaction conditions were obtained.2.The surface chemical properties of C₈,C₉,C₁₀-MADS were determined. Experimental results indicated MADS posessed stable surface properties in inorganic acid,base or salt aqueous solutions even up to 10%mass percent.At the same time,MADS exhibited an excellent emulsifying power with a better decontamination and detergency power in hardwater than conventional sulfactants.3.The regular solution theory is entirely suitable according to the study of C₁₆-MADS/â…¡-12-n binary mixed system.The mixed system has synergism effect of reducing interfacial force efficency and forming micelle groups.Theγ～lgc curves was obtained by measuring interfacial force of C₁₆-MADS andâ…¡-12-n aqueous solution.Thus the surface chemical properties of the system was studied.The intermolecular interaction parameters(β^σandβ^m)of surfactants were calculated through the orthodox solution theory,and the enforcement function was also researched.Results showed that critical micelle concentration(cmc)and the corresponding surface tension(γ_cmc)decreased significantly along with the increase of solution's concentration.The C₁₆-MADS/â…¡-12-n mixed system revealed a higher surface activity than the single surfactant.4.Research on the C₁₆-MADS/K₃/AEO₉ showed that the method of processing binary surfactants in unperfect solutions with orthodox solution theory was mostly applicable to the tertary surfactants such as C₁₆-MADS/K₃/ AEO₉ system.Details were to determine the interaction parameter of the binary system(C₁₆-MADS/K₃),then to process the new binary system by mixing with the third ingredient AEO₉.The mole ratio when C₁₆-MADS/K₃ system could make greatest enforcement was 0.33:0.67,that was when they had equal electricity ratio,while the ratio of C₁₆-MADS/K₃/AEO₉ system was 7:3. However,the method was not so perfect when applied in tertary system for it couldn't give a fully explaination with the cofunction theory in binary system.5.Using C₁₆-MADS as dispersant for the first time,nano ZnO was dispersed in the water and the ceramic glaze.The domestic ceramic glaze dispersed with 1-6%of nano ZnO showed good dispersibility and liquidity.The dehiscence had not appeared on the glazed ceramic surface after being doped, thus the bottleneck problem of nano ZnO agglomerating was solved.The glossiness and microhardness of the ultimate product was improved obviously, while the calcine temperature was decreased.6.In the high concentration,the C₁₆-MADS/CTAB solution had such properties that double aqueous phase would be formed apparently under a suitableconcentration,and volume ratio of the two phase showed disciplinary changes with different ratio of the two ingredients.Polarizing microscope determination showed the mixed solution had a obvious crystal phase structure. Mesoporous molecular sieves were furtherly synthesized using C₁₆-MADS and CTAB as templates.XRD,N₂ adsorption-desorption and HTEM characterization of the obtained samples showed that the obtained samples had structures similar to MCM-41 of two different mesoporous with pore diameters 2.2nm and 3.9nm. Mechanism of the two mesoporous may be atribute to the formation of double aqueous solution in the C₁₆-MADS/CATB system.The difference of the concentration and volume of the two ingredients in the two phases resulted in the formation of two molecular congeries,and two pore structures were formed induced by the two kinds of micelle group structure.Besides,volume difference of the two phase caused the ratio difference of the two micelle congeries,thus the two molecular sieves would have different size with different ratio and unregular disposion.