Surface free energy and wettability of silyl layers on silicon determined from contact angle hysteresis

2005 ◽  
Vol 113 (2-3) ◽  
pp. 121-131 ◽  
Author(s):  
Emil J. Chibowski
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Surface Free Energy ◽  
Contact Angle Hysteresis

scholarly journals Wetting Properties of Polyetheretherketone Plasma Activated and Biocoated Surfaces

2019 ◽  
Vol 3 (1) ◽  
pp. 40 ◽  
Author(s):  
Kacper Przykaza ◽  
Klaudia Woźniak ◽  
Małgorzata Jurak ◽  
Agnieszka Wiącek
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Surface Free Energy ◽  
Contact Angle Hysteresis ◽  
Biologically Active ◽  
Adhesive Properties ◽  
Surface Sterilization ◽  
Wetting Properties ◽  
Angle Measuring ◽  
Modified Surface

Polyetheretherketone (PEEK) biomaterial is a polymer which has been widely used since the early 90s as a material for human bone implant preparations. Nowadays it is increasingly used due to its high biocompatibility and easily modeling, as well as better mechanical properties and price compared to counterparts made of titanium or platinum alloys. In this paper, air low-temperature and pressure plasma was used to enhance PEEK adhesive properties as well as surface sterilization. On the activated polymeric carrier, biologically-active substances have been deposited with the Langmuir-Blodgett technique. Thereafter, the surface was characterized using optical profilometry, and wettability was examined by contact angle measuring. Next, the contact angle hysteresis (CAH) model was used to calculate the surface free energy of the modified surface of PEEK. The variations of wettability and surface free energy were observed depending on the deposited monolayer type and its components.

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.

Measurement of specific surface free energy of ruby and quartz single crystals using contact angle of liquids

2007 ◽  
Vol 42 (12) ◽  
pp. 1217-1221 ◽  
Author(s):  
Takaomi Suzuki ◽  
Naoki Sugihara ◽  
Eiichi Iguchi ◽  
Katsuya Teshima ◽  
Shuji Oishi ◽  
...  
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Specific Surface ◽  
Single Crystals ◽  
Surface Free Energy
Sign in / Sign up

Export Citation Format

Share Document