I would like to measure the contact angle on a flat surface and inside capillary tubes and I would like anyone to help me in the procedures that I need for cleaning the procedure, which helps in removing contamination.
It is better to tell others what surface you use so that they may help you.
Thanks very much for your answer; actually, I am going to use glass, quartz and mica surfaces
You can use Tegotens B 810 from Evonik, Germany to clean the surface but as it has a slight hydrophobic property, you have to dry it perfectly and rinse it with water and further dry it; so that there is no more of the chemicals on the surface. Usually we used it for cleaning the surfaces prior to hydrophobizing or hydrophilizing the surfaces. Please find the technical information in the attached file or in the following link
http://tempo.ca/wp-content/uploads/2014/12/Tegotens-B-810.TDS_.12.01.11.pdf
We use so called chromic acid (potassium chromate dissolved in conc. sulfuric acid) to clean glass surfaces, since it is a strong oxidant and removes everything, especially surfactants which strongly affect contact angle. For vinyl or modified and non-modified aluminum surfaces we use acetone and then drie surfaces with compressed nitrogen.
When using chromic acid be really careful.
Best regards!
You may also use oxygen plasma treatment and then water wash. Sodium dodecyl sulfate wash may also be applied before water wash.
there are many ways to do that, but I think you need to choose cheap and available one!!! generally you have two kinds of dirt on your substrate: organics and inorganics.
try to use proper acid for short time for inorganics (piranha solution also can be used). Then rinse with water. for organics you need to use these in raw: Acetone, Methylene (Methyl alcohol), Ethylene (ethyl alcohol) and then rinse with excessive DI Water.
This is what I do generally. but if you have, you can use plasma also after these steps.
Dear Ebraheam. It might be possible that the surface cleaning results reactive surface relative to the ultra-pure water (compare to the reactive dewetting,) .
Article Detailed statistical contact angle analyses; “slow moving” d...
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