Acoustic and viscosity studies of sodium dodecyl sulfate in aqueous solutions of gelatin

被引：50
作者：
Chauhan, S. [1 ]
Chauhan, M. S. [1 ]
Jyoti, J. [1 ]
Rajni [1 ]
机构：
[1] Himachal Pradesh Univ, Dept Chem, Shimla 171005, Himachal Prades, India
来源：
JOURNAL OF MOLECULAR LIQUIDS | 2009年 / 148卷 / 01期
关键词：
Surfactant; Gelatin; Interactions; Ultrasonic velocity; Density; Apparent molar volume; Apparent molar compressibility; Viscosity; BINDING; SURFACTANT; SCATTERING; LYSOZYME; BEHAVIOR;
D O I：
10.1016/j.molliq.2009.05.002
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：
Ultrasonic velocities and densities of anionic surfactant, sodium dodecyl sulfate (SIDS), in aqueous solutions of gelatin (0.25, 0.50, 1.00%w/v) have been measured over a wide temperature range (20-40 degrees C) at an interval of 2 degrees C by using DSA-5000. The data was used to calculate partial molar volume (Phi(v)), adiabatic compressibility (beta) and apparent molar compressibility ((Phi(k)) in order to explain protein-surfactant interactions. Viscosity measurements (viscous relaxation time and activation energy parameter) of SDS in aqueous solutions of gelatin were also carried Out to support the explanation. A minimum observed in case of activation parameter in the concentration region 6-8 mmol kg(-1) of SIDS supported the results obtained by other parameters indicating micellar solubilisation of the SDS in this region. The behaviour of both Phi(k) and Phi(v) data indicates that SDS binding to gelatin is non-cooperative at low surfactant concentration but becomes cooperative at higher concentration. (C) 2009 Elsevier B.V. All rights reserved.
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页码：24 / 28
页数：5
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