Abstract

On the basis of the principle of Bratch's electronegativity equalization, we calculated group partial charges and group electronegativities for nonionic surfactants with Pauling's elecoonegativity parameters by using numerical calculation method. From calculated outputs we have investigated structural stability of micelle, characteristics of hydrophilic and hydrophobic groups, and relation between CMC(Critical Micelle Concentraion) and group partial charge and group electronegativity of hydrophilic and hydrophobic groups for nonionic surfactants. We have known that CMC by micelle formation depends upon group partial charge and group electronegativity of hydrophilic and hydrophobic groups for surfactants. Also, the structural stability of micelle in H2O solution is related to the electric double layer by the hydrophilic group of nonionic surfactants with H atoms in water CMC is diminished by the decrease of repeating units in hydrophilic group at constant hydrophobic group and is diminished by the increments of alkyl chains in hydrophobic group at constant hydrophilic group for nonionic surfactants. In conclusion, CMC is diminished because there is no electrostatic repulsion and is diminished of Debye length by the increments of partial charge of hydrophobic group.

주제어

#principle of Bratchs electronrgativity equalization   #group partial charges   #group electronegativities   #Paulings electronegativity parameter   #numerical caculation method   #hydrophilic and hydrophobic groups   #CMC   #nonionic surfactants   #Debye length  

저자의 다른 논문

참고문헌 (20)

1. Critical Micelle Concentrations of Polyoxyethylated Non-Ionic Detergents , Hsiao,L.;H.N.Dunning;P.B.Lorenz , J. Phys. Chem. / v.60,pp.657, 1956
   
2. The Critical Micelle Concentrations in Aqueous Solutions of Potassium Alkyl Malonates , Shinoda,K. , J. Phys. Chem. / v.59,pp.432, 1954
   
3. The Electronegativity of Groups , Huheey,J.E. , J. Phys. Chem. / v.69,pp.3284, 1965
   
4. A Group Electronegativity Method with Pauling Units , Bratsch,S.G. , J. Chem. Edu. / v.62,pp.101, 1985
   
5. Electronegativity Equalization with Pauling Units , Bratsch,S.G. , J. Chem. Edu. / v.61,pp.588, 1984
   
6. Mcbain,J.W.;C.S.Salmon , J. Am. Chem. Soc. / v.43,pp.426, 1920
   
7. Structure and Aggregation in Dilute Solutions of Surface Active Agents , Klebens,H.D. , J. Am. Oil Chem. / v.30,pp.74, 1953
   
8. Catlow,C.R.A. , NATO ASI Series / v.293,pp.1, 1990
   
9. Nadeau,H.G.;S.Siggia , Surfactant Science Series / v.23,pp.860, 1987
   
10. Rosen,M.J. , Surfacts and Interfacial Phenomena / v.,pp.122, 1989
    
11. Son,M.S.;Y.S.Ha;U.H.Paek , J. Nat. Sci.(Kyeongsang National Univ.) / v.8,pp.169, 1992
    
12. An Interpretation of Bond Lengths and a Classification of Bonds , Sanderson,R.T. , Science / v.114,pp.670, 1951
    
13. Sanderson,R.T. , J. Chem. Edu. / v.31,pp.2, 1954
    
14. Tanford,C. , The Hydrophobic Effect:Formation of Micelles and Biological Membranes / v.,pp., 1980
    
15. Atkins,P.W. , Physical Chemistry / v.,pp., 1990
    
16. Harkins,W.D.;R.Mittelmann , J. Colloid Sci. / v.4,pp.367, 1949
    
17. Hartley,G.S. , Aqueous Solutions of Paraffin Chain Salts / v.,pp., 1936
    
18. Mcbain,J.W.;J.T.Martin , J. Chem. Soc. / v.105,pp.957, 1914
    
19. Fujimoto,T. , New Introduction to Surface Active Agents / v.,pp.29, 1984
    
20. Jolly,W.L. , Modern Inorganic Chemistry / v.,pp.72, 1984
    

이 논문을 인용한 문헌 (0)

1. 이 논문을 인용한 문헌 없음