Counterion Nature and Alkylammonium Halide Adsorption Thermodynamics

被引：6
作者：
Dantas, T. N. C. [1 ]
Wanderley Neto, A. O. [1 ]
Moura, E. F. [1 ]
Scatena, H. [1 ]
Fonseca, J. L. C. [1 ]
机构：
[1] Univ Fed Rio Grande do Norte, Dept Quim, BR-59078970 Natal, RN, Brazil
来源：
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2009年 / 30卷 / 07期
关键词：
Adsorption; bubble surface tensiometry; hydrogen bromide; hydrogen chloride; MICELLE FORMATION; SURFACTANTS; CORROSION; MIXTURES; BROMIDE; INHIBITORS; IRON;
D O I：
10.1080/01932690802598747
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Two surfactants were synthesized by reacting hydrogen halides (hydrogen chloride and hydrogen bromide) with 1-dodecylamine. The resultant cationic surfactants, 1-dodecylammonium chloride (DDAC) and 1-dodecylammonium bromide (DDAB), were characterized by NMR spectrometry and FTIR spectroscopy and data related to their adsorption at the fluid liquid/gas interface were obtained employing bubble surface tensiometry, in pure water and in HCl 0.1M. Data did not fit well to Langmuir isotherm but Frumkin isotherm did adequately describe to process of adsorption. Adsorption isotherms, as well as data related to critical micelle concentration, CMC, indicated that in HCl 0.1M, the presence of electrolytes and a common ion to DDAC decreased chloride solvation, changing surface packing and adsorption profile for this surfactant.
引用
收藏
页码：1046 / 1049
页数：4
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