A modified sessile drop technique for the determination of the interactions at carbon-liquid interfaces

Carbon ◽  
1991 ◽  
Vol 29 (3) ◽  
pp. 449-455 ◽  
Author(s):  
Klaus J. Hüttinger ◽  
Sabine Höhmann ◽  
Marianne Seiferling
Keyword(s):  
Sessile Drop ◽  
Liquid Interfaces ◽  
Sessile Drop Technique ◽  
Drop Technique

Determination of Surface Free Energy and Contact Angle for Hydrolyzed Shellac

2012 ◽  
Vol 506 ◽  
pp. 270-273 ◽  
Author(s):  
P. Kraisit ◽  
S. Limmatvapirat ◽  
J. Nunthanid ◽  
Manee Luangtana-Anan ◽  
K. Terada ◽  
...  
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Surface Free Energy ◽  
Sessile Drop ◽  
Polar Group ◽  
Sessile Drop Technique ◽  
Hydrolysis Process ◽  
Polar Force ◽  
Drop Technique

The purpose of this research was to determine surface free energy and contact angle of hydrolyzed shellac by using sessile drop technique. It is a method for determination of contact angle by placing a drop of liquid on a substrate and the surface free energy is then calculated by using the Wus equation. The substrate in this study was the hydrolyzed shellac prepared by hydrolysis of the native shellac at various times; 0, 15, 30 and 45 min using 2.0 %w/w sodium hydroxide. Water, formamide and ethylene glycol were liquids used for the investigation of the contact angle and surface free energy. The effect of hydrolysis time tended to reduce the contact angle and increase in the total surface free energy and polar force of hydrolyzed shellac. The result could be due to the breaking of the ester bonds of shellac during the hydrolysis process causing the higher free carboxyl group giving the higher polar group indicating by higher polar force and surface free energy. Therefore, the contact angle and surface free energy detected by sessile drop technique could be of benefit for the determination of hydrolysis process.

Studies of the wetting characteristics of liquid iron on dense alumina by the X-ray sessile drop technique

2003 ◽  
Vol 34 (2) ◽  
pp. 193-199 ◽  
Author(s):  
E. Kapilashrami ◽  
A. Jakobsson ◽  
S. Seetharaman ◽  
A. K. Lahiri
Keyword(s):  
Liquid Iron ◽  
Sessile Drop ◽  
Sessile Drop Technique ◽  
X Ray ◽  
Drop Technique

scholarly journals Wetting ofAl2O3by Molten Aluminum: The Influence ofBaSO4Additions

2008 ◽  
Vol 2008 ◽  
pp. 1-12 ◽  
Author(s):  
Joaquin Aguilar-Santillan
Keyword(s):  
High Temperatures ◽  
Firing Temperature ◽  
Molten Aluminum ◽  
Sessile Drop ◽  
Contact Angles ◽  
Sessile Drop Technique ◽  
Pure Alumina ◽  
Two Temperatures ◽  
Drop Technique

The effects ofBaSO4additions on the wetting of alumina by molten aluminum were studied by the sessile drop technique. To study the effect ofBaSO4decomposition(1100–1150∘C), the additions were treated at two temperatures700∘C(973 K) and1450∘C(1723 K), respectively.BaSO4additions at low and high temperatures did not improve the nonwetting character of these compositions. However, at higher firing temperature, the formation ofBA6 (BaO•6Al2O3)has a nonwetting trend with increasing its content. To address theBA6specifically a pureBaO•6Al2O3was produced and tested. It was more nonwetting than the pure alumina. After the analysis of the contact angles for theBaSO4and theBA6 (BaO•6Al2O3), it was concluded that these additions to alumina do not inhibit wetting by molten aluminum. In fact, at the addition levels common for refractories, the wetting tendency of molten aluminum is enhanced. Alternative explanations for the effectiveness ofBaSO4additions to alumina refractories are discussed.

Fabrication of Miniature Surface Plasmon Resonance Sensor Chips by Using Confined Sessile Drop Technique

2019 ◽  
Vol 11 (12) ◽  
pp. 11954-11960
Author(s):  
Supeera Nootchanat ◽  
Wisansaya Jaikeandee ◽  
Patrawadee Yaiwong ◽  
Chutiparn Lertvachirapaiboon ◽  
Kazunari Shinbo ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Sessile Drop ◽  
Surface Plasmon Resonance Sensor ◽  
Sessile Drop Technique ◽  
Resonance Sensor ◽  
Drop Technique

Elastomeric PDMS Planoconvex Lenses Fabricated by a Confined Sessile Drop Technique

2016 ◽  
Vol 8 (31) ◽  
pp. 20474-20482 ◽  
Author(s):  
S. Ekgasit ◽  
N. Kaewmanee ◽  
P. Jangtawee ◽  
C. Thammacharoen ◽  
M. Donphoongpri
Keyword(s):  
Sessile Drop ◽  
Sessile Drop Technique ◽  
Drop Technique

Wetting and Interfacial Behaviors of Molten Ag, Cu and Ag-28Cu on WC-8Co Cemented Carbide

2016 ◽  
Vol 697 ◽  
pp. 555-560 ◽  
Author(s):  
Hao Fu ◽  
Xiang Zhao Zhang ◽  
Gui Wu Liu ◽  
Zi Wei Xu ◽  
Tie Zheng Pan ◽  
...  
Keyword(s):  
Contact Angle ◽  
Sessile Drop ◽  
Testing Temperature ◽  
Cemented Carbide ◽  
Equilibrium Contact Angle ◽  
Sessile Drop Technique ◽  
Different Temperatures ◽  
Higher Temperature ◽  
Drop Technique ◽  
Scanning Electron

The wetting and spreading of molten Cu, Ag and Ag-28Cu (wt.%) on the WC-Co cemented carbide were investigated by the sessile drop technique at different temperatures, and the interfacial behaviors of the metal/WC-Co couples were analyzed by scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS). The experimental results showed that the testing temperature and the composition of drop can play a key role in the wetting and spreading, and the good wettability with contact angle of less than 40o can be obtained. Moreover, the strongest interactions can be produced between the molten Cu and the WC-Co substrate at the higher temperature of 1100 oC due to the strong interdiffusion and solid solution between Cu and Co, resulting in the lowest equilibrium contact angle of ~0o. In addition, smooth and clean interfaces, without formation of visible interfacial reaction layer, were observed in all the three wetting systems. This work may also provide guidance to brazing of the cemented carbide.

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