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Citation: XIE Dan-Hua, ZHOU Tian-Hua, ZHAO Jian-Xi. Effects of NaBr on Adsorption and Aggregation of Heterogemini Surfactant C_mOhpNC₈ in Aqueous Solution[J]. Chinese Journal of Applied Chemistry, ;2010, 27(3): 318-322. doi: 10.3724/SP.J.1095.2010.90186 shu

Effects of NaBr on Adsorption and Aggregation of Heterogemini Surfactant C_mOhpNC₈ in Aqueous Solution

Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002

Received Date: 19 March 2009
Revised Date: 11 May 2009

The effects of NaBr on the properties of heterogemini surfactant C_mOhpNC₈ (m:10,14,16) in aqueous solution were investigated by means of surface tension and fluorescence probe techniques.The results show that NaBr strongly promoted the adsorption and the aggregation of C_mOhpNC₈ at the air/water interface in aqueous bulk solution.The c₂₀ was reduced to extremely low order of magnitude of micromole per liter at c(NaBr) ≥ 10 mmol/L,showing quite a high efficiency in surface tension reduction.Upon NaBr addition,C_mOhpNC₈ exhibited strong premicellization in aqueous bulk solution.So low c₂₀ and evident premicellization could not be observed in the equal-mole mixture of the corresponding conventional surfactants,exhibiting the surface-active advantage as well as the salt-sensitivity of heterogemini-type surfactant,in which a short spacer was introduced to link the two different headgroups.
- heterogemini surfactant C_mOhpNC₈,
- NaBr,
- aqueous solution surface tension,
- premicellization
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Effects of NaBr on Adsorption and Aggregation of Heterogemini Surfactant C_mOhpNC₈ in Aqueous Solution