Short timescale wetting and penetration on porous sheets measured with ultrasound, direct absorption and contact angle.

ABSTRACT: In this study the short timescale penetration and spreading of liquids on porous sheets is investigated. Three measurement techniques are evaluated: ultrasonic liquid penetration measurement (ULP), contact angle measurement (CA) and scanning absorptiometry (SA). With each of these techniques liquid penetration as well as surface wetting can be measured. A quantitative comparison between the methods is carried out. For our studies we are using model liquids with tuneable surface tension, viscosity and surface energy which are the governing parameters for pore flow according to the Lucas-Washburn equation. Scanning absorptiometry turns out to be an adequate tool for direct measurement for liquid penetration. Ultrasonic liquid penetration showed a stable correlation (R ² = 0

SUBMITTER: Sarah K 

PROVIDER: S-EPMC9079626 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature