Re: Adhesion

From: MARTINM <martinm@SoftHome.net>
Subject: Re: Adhesion
Date: Mon, 21 Feb 2005 12:49:35 +0100

> > Between these supports, there is a big difference in dimensional
> > stability and elasticity of the support. Paper base will swell and
> > expand to some extend to accomodate the same in the gelatin, but glass
> > won't.
>
> No doubt. The parallel I saw was with respect to adhesion to a support.

A parallel may apply to the adhesion force but the tensile force of
the coated material varies if the support and the coated material have
different lateral swelling factor. At one point, the coated material
may peel off when wet if the swelling difference is large.

> I gathered the silane thing was not pH dependent.

Do you have a reference for this? (Or your own data?)
The ionized state of the amino group of 3-apes
(3-aminopropyltriethoxysilane) is critically involved in the adhesion.
So are the ionization profile of amino and carboxyl groups in
gelatin. These are all pH dependent.

--
Ryuji Suzuki
"Well, believing is all right, just don't let the wrong people know
what it's all about." (Bob Dylan, Need a Woman, 1982)