Free energy and vapor pressure of sessile drops. 1. Rapidly established contact angle equilibrium

1987 ◽  
Vol 91 (2) ◽  
pp. 353-356 ◽  
Author(s):  
Malcolm E. Schrader ◽  
George H. Weiss
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Vapor Pressure ◽  
Sessile Drops

Free energy and vapor pressure of sessile drops. 2. Hysteresis

1990 ◽  
Vol 135 (2) ◽  
pp. 586-589 ◽  
Author(s):  
Malcolm E Schrader ◽  
George H Weiss
Keyword(s):  
Free Energy ◽  
Vapor Pressure ◽  
Sessile Drops

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

Hydrophobic and Oleophilic Filter Paper for Oil/Water Separation

2019 ◽  
Vol 798 ◽  
pp. 385-390
Author(s):  
Sunisa Jindasuwan ◽  
Sitthisuntorn Supothina
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Surface Free Energy ◽  
Water Contact Angle ◽  
Filter Paper ◽  
Diesel Oil ◽  
Selective Removal ◽  
Water Contact ◽  
Water Separation ◽  
Filter Papers

The separation of oil from water is significance for environmental de-pollution application. To obtain selectivity of liquid, filter papers were coated to bear highly hydrophobic and oleophilic functionality that can allow only oils to pass through them. The coating solutions were prepared by mixing poly(methylhydro siloxane, PMHS) and fumed silica at various proportions. To determine an optimum coating condition, properties of the treated filter papers were investigated by measuring water contact angle and surface free energy, examining surface morphology and testing for selective removal of diesel oil from water. The optimum coating solution was at the PMHS:fumed silica weight ratio of 1.25:1.00. The treated filter paper exhibited high hydrophobicity with water contact angle of 142.80 ± 0.36 degrees and surface free energy of 0.78 mJ/m2. In addition, it exhibited high selective removal of diesel oil from water with oil absorption capacity of 2.3 g/g.

scholarly journals Evaluating the Surface Free Energy and Moisture Sensitivity of Warm Mix Asphalt Binders Using Dynamic Contact Angle

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Muhammad Rafiq Kakar ◽  
Meor Othman Hamzah ◽  
Mohammad Nishat Akhtar ◽  
Junita Mohamad Saleh
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Hot Mix Asphalt ◽  
Asphalt Binder ◽  
Moisture Damage ◽  
Warm Mix Asphalt ◽  
Work Of Adhesion ◽  
Moisture Sensitivity ◽  
Modified Binders ◽  
Production Temperature

From the environmental conservation perspective, warm mix asphalt is more preferable compared to hot mix asphalt. This is because warm mix asphalt can be produced and paved in the temperature range 20–40°C lower than its equivalent hot mix asphalt. In terms of cost-effectiveness, warm mix asphalt can significantly improve the mixture workability at a lower temperature and thus reduce greenhouse gas emissions, to be environment friendly. However, the concern, which is challenging to warm mix asphalt, is its susceptibility to moisture damage due to its reduced production temperature. This may cause adhesive failure, which could eventually result in stripping of the asphalt binder from the aggregates. This research highlights the significance of Cecabase warm mix additive to lower the production temperature of warm mix asphalt and improvise the asphalt binder adhesion properties with aggregate. The binders used in the preparation of the test specimen were PG-64 and PG-76. The contact angle values were measured by using the dynamic Wilhelmy plate device. The surface free energy of Cecabase-modified binders was then computed by developing a dedicated algorithm using the C++ program. The analytical measurements such as the spreadability coefficient, work of adhesion, and compatibility ratio were used to analyze the results. The results inferred that the Cecabase improved the spreadability of the asphalt binder over limestone compared to the granite aggregate substrate. Nevertheless, the Cecabase-modified binders improved the work of adhesion. In terms of moisture sensitivity, it is also evident from the compatibility ratio indicator that, unlike granite aggregates, the limestone aggregates were less susceptible to moisture damage.

scholarly journals Correction to “Contact Angle of Sessile Drops in Lennard-Jones Systems”

Langmuir ◽  
2018 ◽  
Vol 34 (10) ◽  
pp. 3374-3374 ◽  
Author(s):  
Michaela Heier ◽  
Stefan Becker ◽  
Herbert M. Urbassek ◽  
Martin Horsch ◽  
Hans Hasse
Keyword(s):  
Contact Angle ◽  
Lennard Jones ◽  
Sessile Drops
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