Urine Advancing Contact Angle on Several Surfaces

Urine wetting properties may influence the design and performance of catheters, urinalysis instruments, and lab-on-a-chip technologies. In this study the advancing contact angle adv of urine on several materials is characterized. Material type and surface tension have a significant effect on adv , w...

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Bibliographic Details
Published in:Journal of adhesion science and technology 2009-01, Vol.23 (15), p.1917-1923
Main Authors: Thomas, Evan A., Poritz, Darwin H., Muirhead, Dean L.
Format: Article
Language:English
Subjects:
Biological and medical sciences
CAPILLARITY
CONTACT ANGLE
Fundamental and applied biological sciences. Psychology
MICROGRAVITY FLUID MANAGEMENT
Molecular biophysics
Surface properties. Adsorption
URINE
WETTING
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Summary:Urine wetting properties may influence the design and performance of catheters, urinalysis instruments, and lab-on-a-chip technologies. In this study the advancing contact angle adv of urine on several materials is characterized. Material type and surface tension have a significant effect on adv , while pretreatment and aging do not. Mean urine adv are between ≈78° and ≈89° on hydrophilic surfaces, and up to over ≈105° on hydrophobic surfaces. Expected urine contact angles will decrease from the DI water contact angles by on average 10°, and up to 20°, while urine surface tension will be lower than DI water by 12.12 mN/m and 18.53 mN/m. A unit change (mN/m) in surface tension results in a 0.75° change in adv . These results indicate that systems attempting to exploit urine wetting must account for highly variable conditions.
ISSN:0169-4243
1568-5616
DOI:10.1163/016942409X12508517390879