The evaluation of surface free energy of polymers: The role of water acid-base properties and the measurement of an “equilibrium” contact angle

2014 ◽  
pp. 55-82
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Surface Free Energy ◽  
Equilibrium Contact Angle ◽  
Acid Base ◽  
Base Properties

Effect of temperature on the surface free energy and acid–base properties of Gabapentin and Pregabalin drugs − a comparative study

RSC Advances ◽  
2015 ◽  
Vol 5 (60) ◽  
pp. 48712-48719 ◽  
Author(s):  
S. Ramanaiah ◽  
Vikram Karde ◽  
P. Venkateswarlu ◽  
Chinmay Ghoroi
Keyword(s):  
Free Energy ◽  
Surface Energy ◽  
Comparative Study ◽  
Surface Free Energy ◽  
Effect Of Temperature ◽  
Temperature Dependent ◽  
Acid Base ◽  
Base Properties

Temperature dependent surface energy variations observed in Gabapentin and Pregabalin drugs.

Surface Free Energy of Boron-Compounds Modified Poplar Veneer

2013 ◽  
Vol 753-755 ◽  
pp. 843-847 ◽  
Author(s):  
Chen Chen Li ◽  
Zhi Yong Qin ◽  
Qian Zhang ◽  
Jiang Zhang Li
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Surface Free Energy ◽  
Sessile Drop ◽  
Untreated Wood ◽  
Initial Contact ◽  
Boron Compounds ◽  
Acid Base ◽  
The Difference ◽  
Better Than

The contact angle of three different reference liquids (i.e. distilled water, diiodomethane, and formamide) was measured by the sessile drop method by gently placing droplet onto the surface of the boron-compounds treated poplar veneer in this study. The permeability of the modified poplar veneer was evaluated. The surface free energy, as well as two components, namely, Lifshizvander Waals(LW) and Acid-base(AB), were calculated by the Acid-base theory, whereas the polar and nonpolar components were calculated according to the OWRK theory. The result shows that the initial contact angle of boron-compounds modified poplar veneer are significantly less than the untreated wood, which indicates that the wettability of boron-compounds polar veneer is better than the untreated wood. The same situation applies to the permeability. In addition, the surface free energy of boron-compounds modified poplar veneer is reduced, but the difference is very small.

Within-tree variations in the surface free energy of wood assessed by contact angle analysis

2011 ◽  
Vol 46 (1-3) ◽  
pp. 287-298 ◽  
Author(s):  
Davide Rossi ◽  
Sergio Rossi ◽  
Hubert Morin ◽  
Antonio Bettero
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Surface Free Energy ◽  
Contact Angle Analysis
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