Effect of A Long Chain Carboxylate Acid on Sodium Dodecyl Sulfate Micelle Structure: A SANS Study
Effect of A Long Chain Carboxylate Acid on Sodium Dodecyl Sulfate Micelle Structure: A SANS Study
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长链羧酸对十二烷基硫酸钠胶束结构的影响：SANS 研究
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
B. Seong
中科院分区：
文献类型：
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作者：
A. Patriati;E. G. R. Putra;B. Seong
使用小角中子散射 (SANS) 研究了不同烃链长度的羧酸，即十二烷酸、CH3(CH)10COOH 或月桂酸和十六烷酸、CH3(CH2)14COOH 或棕榈酸作为 0.3 M 十二烷基硫酸钠 SDS 胶束溶液中的助表面活性剂的影响。月桂酸的存在诱导了 SDS 结构胶束。在 0.005 M 至 0.1 M 月桂酸存在下，椭圆体胶束结构的长度（长轴）显着变化，从 22.6 A 变为 37.1 A，短轴固定为 16.7 A。然而，在相同浓度范围的棕榈酸存在下，没有出现这种效果。棕榈酸分子的存在对 SDS 胶束的生长没有显着影响，其中胶束的长轴仅从 22.9 A 伸长到 25.3 A。结果表明，表面活性剂和助表面活性剂分子之间适当的烃链长度是形成混合胶束的决定因素之一......
The effect of a different hydrocarbon chain length of carboxylate acid, i.e. dodecanoic acid, CH3(CH)10COOH or lauric acid and hexadecanoic acid, CH3(CH2)14COOH or palmitic acid as a co‐surfactant in the 0.3 M sodium dedecyl sulfate, SDS micellar solution has been studied using small angle neutron scattering (SANS). The present of lauric acid has induced the SDS structural micelles. The ellipsoid micelles structures changed significantly in length (major axis) from 22.6 A to 37.1 A at a fixed minor axis of 16.7 A in the present of 0.005 M to 0.1 M lauric acid. Nevertheless, this effect did not occur in the present of palmitic acid with the same concentration range. The present of palmitic acid molecules performed insignificant effect on the SDS micelles growth where the major axis of the micelle was elongated from 22.9 A to 25.3 A only. It showed that the appropriate hydrocarbon chain length between surfactant and co‐surfactant molecules emerged as one of the determining factors in forming a mixed micelle...