Controlling contact angle

[treo]

Hello all,

I was wondering if there was any method in being able to control the contact angle on a given surface? By control I mean,for instance, add something to a droplet of water on glass to increase/decrease it's C.A. Does anyone know of a website, book, or even from experience for how this is done?

Thank you,
Nick

 

[m777182]

You can influence the contact angle with surfactants.It should be measured for a particular solid and liquid pair.
M777182

 

[Aus02]

Nick

A surfactant coating will indeed change the contact angle by making the surface more hydrophillic (or phobic). Titanium dioxide coatings are an option. I would imagine that work has been done on this in the membrane industry (prevention of fouling) and even in commercial glass production for windows etc.

Not much help I guess but maybe a lead....