Re: Adhesion

From: MARTINM ^lt;[email protected]>
Date: 02/22/05-05:37:51 AM Z
Message-id: <001c01c518d3$356d0370$7b9d4854@MUMBOSATO>

> 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.

... but probably not relevant at the pH range prior to coating.

Martin

----- Original Message -----
From: "Ryuji Suzuki" <rs@silvergrain.org>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Monday, February 21, 2005 4:14 PM
Subject: 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)
Received on Tue Feb 22 05:39:08 2005

This archive was generated by hypermail 2.1.8 : 03/01/05-02:06:55 PM Z CST