Relationship of structure to properties of surfactants. 16. Linear decyldiphenylether sulfonates

The properties of some well-characterized sodium linear decyldiphenylether (C₁₀DPE)sulfonates have been studied. Among the properties investigated are dynamic and equilibrium surface tension, critical micelle concentration (CMC), area per molecule at the aqueous solution/air interface, wetting time by the Draves technique, foaming by the Ross-Miles method, solubilization, and hydrotropy. The decyldiphenylether moiety appears to be equivalent to a terminally substituted straight alkyl chain of 16 carbon atoms. The trialkyl- and dialkyl-mono-sulfonates have solubilities of < 0.01 g/dm³ in water, but are readily soluble in hexane. The didecyldiphenyl ether disulfonate (DADS) has a very low CMC value (1.0 × 10⁻⁵ mol dm⁻³) in aqueous 0.1 N Na⁺ solution (NaCl), characteristic of surfactants with two hydrophilic and two hydrophobic groups. It also has a much larger area per molecule at the aqueous solution/air interface than the monodecyldiphenyl-ether monosulfonate (MAMS) and a much higher surface tension at the CMC. MAMS has a much lower surface tension at a surface age of 1 second (γ_1s) than either DADS or the monodecyldiphenylether disulfonate (MADS). In agreement with γ_1s and γ_eq values, wetting times increase in the order: MAMS < DADS < MADS and initial foam heights decrease in the order: MAMS > DADS > MADS. Solubilization for three water-insoluble surfactants decreases in the order: DADS > MAMS > MADS, while hydrotropy is most pronounced with the disulfonates.     

烷基二苯醚双磺酸盐的合成及应用研究进展

介绍了烷基二苯醚双磺酸盐的合成及应用研究进展。重点阐述了卤代烷、烯烃和脂肪醇为烷基化剂时相应的烷基化催化剂以及烷基二苯醚双磺酸盐在乳液聚合、浓缩液洗和三次采油中的应用。提出应开发脂肪醇为烷基化剂的催化剂和适合高黏度磺化产物的磺化反应器。     

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介绍了最早实现工业化的双亲水基阴离子表面活性剂烷基二苯醚双磺酸盐的制备方法、性能特点，并与传统的单亲水基阴离子表面活性剂进行了比较。认为这类表面活性剂非常适于配制低温无磷超浓缩液体洗涤剂以及含漂白剂的洗涤剂，并有望在三次采油及土壤修复等与地质有关的场合大量应用。     

烷基二苯醚双磺酸盐类表面活性剂的多功能性和应用前景

介绍了最早实现工业化的双亲水基阴离子表面活性剂烷基二苯醚双磺酸盐的制备方法、性能特点，并与传统的单亲水基阴离子表面活性剂进行了比较。认为这类表面活性剂非常适于配制低温无磷超浓缩液体洗涤剂以及含漂白剂的洗涤剂，并有望在三次采油及土壤修复等与地质有关的场合大量应用。     

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介绍了烷基二苯醚双磺酸钠的制备工艺和应用研究。阐述了烷基二苯醚双磺酸钠在乳液聚合、洗涤剂、三次采油、土壤修复和矿化浮选中的应用。对烷基二苯醚双磺酸钠的应用前景进行了展望。