Interfacial Interaction of Binary Mixtures of Surfactants Hexadecyl Benzylammonium Chloride (HDBAC) and Tween 20 in Aqueous Solutions

Q4 Materials Science

Journal of Surface Science and Technology Pub Date : 2020-01-31 DOI:10.18311/JSST/2019/21455

Inaam H. Ali, Sameer H. Kareem

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引用次数: 2

Abstract

The surface adsorption properties of mixed binary surfactants containing hexadecyl benzylammonium chloride (HDBAC) and Tween 20 in aqueous solutions were studied at different temperatures (288-318K) using tensiometry techniques. The interaction parameters and surface activity for both individual and mixed surfactants systems, the Critical Micelle Concentration (CMC), maximum surface excess concentration (Î“max) and minimum surface area per surfactant molecule (Amin) at the air-water interface were determined. Also, the parameters related to synergism in surface activity such as adsorption efficiency (pC20) and CMC/C20 were calculated. The results obtained reveal that the binary mixed system possess CMC values lower than its components and these values decrease with increasing the concentration of Tween 20 in the solution. This behavior shows non-ideal synergism of the mixing process. The values of molecular interaction parameters Î²Ïƒ and the mole fraction of components at the air-water interface X1Ïƒ are calculated on the basis of Rosen's model and showed that the interaction parameter of the adsorbed monolayer is always negative and has a higher negative value for 0.9 Tween mole fractions.

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表面活性剂十六烷基苄基氯化铵(HDBAC)和吐温20二元混合物在水溶液中的界面相互作用

采用张力法研究了含十六烷基苄基氯化铵(HDBAC)和Tween 20的二元混合表面活性剂在不同温度(288 ~ 318k)下的表面吸附性能。测定了单个表面活性剂和混合表面活性剂体系的相互作用参数和表面活性、临界胶束浓度(CMC)、最大表面过量浓度(Î”max)和每个表面活性剂分子在空气-水界面的最小表面积(Amin)。并计算了吸附效率(pC20)和CMC/C20等与协同作用有关的表面活性参数。结果表明，二元混合体系的CMC值低于其组分，且随溶液中Tween 20浓度的增加而降低。这种行为表明混合过程的非理想协同作用。根据Rosen模型计算了分子相互作用参数Î²Ïƒ和空气-水界面组分摩尔分数X1Ïƒ的值，结果表明，吸附单层的相互作用参数始终为负，在0.9间摩尔分数时具有更高的负值。

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来源期刊

Journal of Surface Science and Technology PHYSICS, APPLIED-

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期刊介绍： The Indian Society for Surface Science and Technology is an organization for the cultivation, interaction and dissemination of knowledge in the field of surface science and technology. It also strives to promote Industry-Academia interaction