Dehydration of Glass Surfaces Studied by Contact Angle Measurements

✍ Scribed by Tino Engländer; Dieter Wiegel; Lama Naji; Klaus Arnold

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 67 KB
• Volume: 179
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0260

✦ Synopsis

NOTE Dehydration of Glass Surfaces Studied by Contact Angle Measurements

RESULTS AND DISCUSSION

The dehydration process of glass surfaces was studied as a function of time. For this purpose, cleaned microscope slides were

In order to study the influence of surface hydration a simple model can be assumed. The surface tension can be calculated according to a power dried using phosphorus pentoxide. Contact angles between water series and glass were measured over a period of about 3 weeks. It was observed that the contact angle depends strongly on the degree of hydration of the surface. Therefore, surface properties of glass are

not stable in time. It has to be concluded that a single glass is not suited as a test surface in order to determine apolar and polar components of the surface tension of liquids. ᭧ 1996 Academic where q denotes the degree of surface coverage with water bound to polar groups and Q is the contact angle. No theory is necessary for the derivation Press, Inc.