Van Der Waals Attraction between Colloidal Particles: The Retardation Correction for Flat Plates of Arbitrary Thickness

1963 ◽  
Vol 16 (5) ◽  
pp. 774 ◽  
Author(s):  
RJ Hunter
Keyword(s):  
Colloidal Particles ◽  
Van Der Waals ◽  
Finite Thickness ◽  
Correction Factors ◽  
Flat Plates ◽  
Van Der Waals Attraction ◽  
Arbitrary Thickness ◽  
Infinite Extent ◽  
Particle Thickness

An analysis is given of the van der Waals attraction between two flat plates of infinite extent but of finite thickness, taking account of the retardation correction. Four cases are recognized and the four distinct equations are shown to be mutually consistent. A table of correction factors is given for various values of the particle thickness and separation.

scholarly journals Study on Colloidal Model of Petroleum Residues through the Attraction Potential between Colloids

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Long-li Zhang ◽  
Guo-hua Yang ◽  
Chao-he Yang ◽  
Guo-he Que
Keyword(s):  
Dielectric Permittivity ◽  
Potential Energy ◽  
Colloidal Particles ◽  
Fractional Composition ◽  
Van Der Waals ◽  
Thermal Reaction ◽  
Attractive Potential ◽  
Van Der Waals Attraction ◽  
Atmospheric Residue ◽  
Hamaker Constants

The samples of DaGang atmospheric residue (DG-AR), Middle East atmospheric residue (ME-AR), TaHe atmospheric residue (TH-AR), and their thermal reaction samples were chosen for study. All the samples were fractioned into six components separately, including saturates plus light aromatics, heavy aromatics, light resins, middle resins, heavy resins, and asphaltenes. The dielectric permittivity of the solutions of these components was measured, and the dielectric permittivity values of the components can be determined by extrapolation, which increased steadily from saturates plus light aromatics to asphaltenes. Moreover, the Hamaker constants of the components were calculated from their dielectric permittivity values. The Van der Waals attractive potential energy between colloids corresponding to various models could be calculated from the fractional composition and the Hamaker constants of every component. It was assumed that the cores of colloidal particles were formed by asphaltenes and heavy resins mainly; the other fractions acted as dispersion medium. For the three serials of thermal reaction samples, the Van der Waals attraction potential energy between colloids for this kind of model was calculated. For TH-AR thermal reaction samples, the Van der Waals attraction potential energy presented the maximum as thermal reaction is going on, which was near to the end of coke induction period.

Spectral Observation of Surface-Induced Van der Waals Attraction on Atomic Vapour

1991 ◽  
Vol 14 (6) ◽  
pp. 527-532 ◽  
Author(s):  
M Oria ◽  
M Chevrollier ◽  
D Bloch ◽  
M Fichet ◽  
M Ducloy
Keyword(s):  
Van Der Waals ◽  
Spectral Observation ◽  
Van Der Waals Attraction
Sign in / Sign up

Export Citation Format

Share Document