Determination of surface heterogeneity of d-mannitol by sessile drop contact angle and finite concentration inverse gas chromatography

2010 ◽  
Vol 387 (1-2) ◽  
pp. 79-86 ◽  
Author(s):  
Raimundo Ho ◽  
Steven J. Hinder ◽  
John F. Watts ◽  
Sarah E. Dilworth ◽  
Daryl R. Williams ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Contact Angle ◽  
Inverse Gas Chromatography ◽  
Sessile Drop ◽  
Surface Heterogeneity ◽  
Finite Concentration

Filler-Elastomer Interactions. Part VI. Characterization of Carbon Blacks by Inverse Gas Chromatography at Finite Concentration

1992 ◽  
Vol 65 (5) ◽  
pp. 890-907 ◽  
Author(s):  
Meng-Jiao Wang ◽  
Siegfried Wolff
Keyword(s):  
Gas Chromatography ◽  
Energy Distribution ◽  
Inverse Gas Chromatography ◽  
General Trend ◽  
High Energy ◽  
Carbon Blacks ◽  
Finite Concentration ◽  
Good Agreement

Abstract Carbon blacks ranging from N110 to N990 were characterized by means of inverse gas chromatography at finite concentration. The isotherms, net heat, and spreading pressures for benzene and cyclohexane adsorption suggest a general trend of increasing surface activity with increases in specific surface area. This is in good agreement with surface-energy measurements reported previously. The energy-distribution function of adsorption shows that while the concentrations of low-energy sites are comparable for most of the carbon blacks, differences exist with regard to high-energy sites. These suggest that small-particle-size blacks possess a greater number of high-energy centers. The graphitization of carbon blacks results in a considerable reduction in their adsorption capacity and narrows the energy distribution of their surfaces. One can therefore conclude that high-energy sites play an important role in the determination of the surface energies and reinforcing ability of carbon blacks.

scholarly journals Bentonite from Porto Santo Island, Madeira archipelago: surface properties studied by inverse gas chromatography

Clay Minerals ◽  
2010 ◽  
Vol 45 (1) ◽  
pp. 77-86 ◽  
Author(s):  
N. Cordeiro ◽  
J. Silva ◽  
C. Gomes ◽  
F. Rocha
Keyword(s):  
Gas Chromatography ◽  
Surface Properties ◽  
Inverse Gas Chromatography ◽  
Particle Surface ◽  
Sorption Isotherms ◽  
Surface Heterogeneity ◽  
Surface Areas ◽  
Dispersive Surface Energy ◽  
Madeira Archipelago

AbstractThe present paper shows the importance of Inverse Gas Chromatography (IGC) for the determination of the surface properties of bentonites. These properties are dispersive surface energy, acid-base properties, surface heterogeneity, sorption isotherms, BET surface areas and heat of sorption, using different probe molecules. IGC can contribute to the interpretation, prediction and optimization of the studied materials' properties. The paper focuses on two distinctive bentonite samples from Porto Santo Island, Madeira archipelago. In view of their potential value, achieved through their incorporation in products for dermopharmacy and dermocosmetics, particle size and particle surface properties are of fundamental importance.

Determination of the Polar and Total Surface Energy Distributions of Particulates by Inverse Gas Chromatography

Langmuir ◽  
2011 ◽  
Vol 27 (2) ◽  
pp. 521-523 ◽  
Author(s):  
Shyamal C. Das ◽  
Ian Larson ◽  
David A. V. Morton ◽  
Peter J. Stewart
Keyword(s):  
Gas Chromatography ◽  
Surface Energy ◽  
Inverse Gas Chromatography ◽  
Total Surface Energy ◽  
Energy Distributions

scholarly journals THE CONTACT ANGLE CONTROL OF THE SOLDER FOR IMPROVING THE SOLDERING QUALITY

2021 ◽  
pp. 161-166
Author(s):  
Чуйко М.М. ◽  
Завальський В.
Keyword(s):  
Contact Angle ◽  
Sessile Drop ◽  
Electrical Contact ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Soldering Process ◽  
Basic Parameters ◽  
The Right

High quality of the soldering process can be achieved with the right choice of the necessary soldering materials. Since wetting determines the further nature of the connection between the solder and the main soldering material, the contact angle  measurement  is the basis for quality control of soldering materials, provided that the basic requirements of the technological process. The determination of the contact angle value is carried out by the indirect method of the sessile drop, by measuring the basic parameters of the drop using infrared transducer. A smaller value of the contact angle corresponds to a better interaction of materials, and hence a better electrical contact

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