Self Assemblying Kinetics of Sodium Steareate at Castor Oil/Water Interface

Authors

Yong-chun ZHU, Open Laboratory of Liaoning Province on CO2 Mitigation and Comprehensive Controls of pollutants in coal combustion,Chemistry Department,College of Chemistry and Life Sciences,Shenyang Normal University,Liaoning,Shenyang 110034,China;
Li-na TANG, Open Laboratory of Liaoning Province on CO2 Mitigation and Comprehensive Controls of pollutants in coal combustion,Chemistry Department,College of Chemistry and Life Sciences,Shenyang Normal University,Liaoning,Shenyang 110034,China;
Hong-guo JI, Open Laboratory of Liaoning Province on CO2 Mitigation and Comprehensive Controls of pollutants in coal combustion,Chemistry Department,College of Chemistry and Life Sciences,Shenyang Normal University,Liaoning,Shenyang 110034,China;

Abstract

The self assembly membrane(SAM)formation kinetics of sodium stearate at castor oil/water interface was studied by cyclic voltammetrry.At caster oil coated graphite-epoxy solid electrode surface,the SAM grows according to the Gaussian growth function with a rate constant of km=0.0006292(0.0000294)s-1,and maximum particle size at t0=3127s.The SAM of sodium stearate controls the growth and particle size of the deposited copper nano particles well,and forms a composite membrane of the SAM and copper nano particle.The growth mechanism of copper particle at oiled electrode or SAM modified oiled electrode is spherical growth,while it is the semi-spherical growth at bared graphite-epoxy solid phase electrode.Compared with castor oil coated electrode,the deposited copper particles show the stronger interaction to graphite-epoxy solid phase electrode surface with the free energy change of ΔG0 = 3.86 kJ/mol and a weaker interaction to the SAM of sodium stearate with the free energy change of ΔG0=-2.412 kJ/mol.

Keywords

sodium stearate, castor oil/water interface, self assembly membrane, graphite-epoxy solid phase electrode

DOI Link

https://doi.org/10.61558/2993-074X.1806

Publication Date

2007-05-28

Online Available Date

2007-05-28

Revised Date

2007-05-28

Received Date

2007-05-28

Recommended Citation

Yong-chun ZHU, Li-na TANG, Hong-guo JI. Self Assemblying Kinetics of Sodium Steareate at Castor Oil/Water Interface[J]. Journal of Electrochemistry, 2007 , 13(2): 193-197.
DOI: 10.61558/2993-074X.1806
Available at: https://jelectrochem.xmu.edu.cn/journal/vol13/iss2/16