I wish to modify the surface to reduce the water contact angle of glass to about 25 degree .
I am not able to find a suitable silanes or polymer which has good adhesion and intrinsic hydrophilic properties to modify surface of glass .
Most silanes will produce a hydrophobic surface. You need to look at alternative surface treatments.
You can used the surface modification of glass surface with radio-frequency or barrier discharge plasma and this modifify surface covered with vinyltrimethoxysilanes. Vinyltromethoxysilane bonded to discharge plasma activated glass surface should be influenced in second step by hydrolysis, polar functional grups are created and hydrophilicity/polarity of glass surface markedly increased.
This modification procedures is described in my paper: High-density polyethylene functionalized by cold plasma and silanes, I. Novák et al, Vacuum 86 (2012) 2089-2094 (in RG).
I'd use a simple warm (500 C) 50% NaOH wash for a few minutes followed by rinsing in DI water.
I understand but I am looking for durable hydrophilic surface modification which can last long
Martin Stew Glass is already generally hydrophilic so I don't understand your comment.
Use a trialkoxy silane that has a hydrophilic instead of hydrophobic “R” group, e.g. a PEG group
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Inorganic Materials
- Ceramics
- Glass