 | | From: | Michael Hopper | | Subject: | Polymer coatings for magnetic particles about 100 microns in size | | Date: | Sat, 15 Jan 2005 14:04:22 -0500 |
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 | I am interested in finding out how to coat magnetic particles (mostly iron
based) that are between 50 and 150 microns in diameter. I would like a
process that allowed the coating to completely cover the exposed surface or
only cover about 40% of the surface. It would be great if the polymeric
material could be varied such that it was halide rich (fluorinated polymer)
or an amino polymer. An organic solvent free process is preferred.
mike
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| | From: | Uncle Al | | Subject: | Re: Polymer coatings for magnetic particles about 100 microns in size | | Date: | Sat, 15 Jan 2005 19:28:24 -0800 |
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| Michael Hopper wrote:
>
> I am interested in finding out how to coat magnetic particles (mostly iron
> based) that are between 50 and 150 microns in diameter. I would like a
> process that allowed the coating to completely cover the exposed surface or
> only cover about 40% of the surface. It would be great if the polymeric
> material could be varied such that it was halide rich (fluorinated polymer)
> or an amino polymer. An organic solvent free process is preferred.
Sift the powder down a vacuum plasma column and deposit the polymer
for surface coating. Place the dust as monolayer (e.g., electrostatic
pickup) on a belt for 40% plasma coating.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| | From: | Oliver 'Ojo' Bedford | | Subject: | Re: Polymer coatings for magnetic particles about 100 microns in size | | Date: | 16 Jan 2005 12:47:16 +0100 |
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| "Michael Hopper" writes:
> I am interested in finding out how to coat magnetic particles (mostly iron
> based) that are between 50 and 150 microns in diameter. I would like a
> process that allowed the coating to completely cover the exposed surface or
> only cover about 40% of the surface. It would be great if the polymeric
> material could be varied such that it was halide rich (fluorinated polymer)
> or an amino polymer. An organic solvent free process is preferred.
Perhaps a process like the one described in
http://elib.tu-darmstadt.de/diss/000377/ could be used (english
abstract at the end of the page). The work was supervised by
Prof. Horst Hahn at the Technical University Darmstadt.
Regards,
Oliver
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| | From: | Michael Hopper | | Subject: | Re: Polymer coatings for magnetic particles about 100 microns in size | | Date: | Sun, 16 Jan 2005 14:19:23 -0500 |
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"Oliver 'Ojo' Bedford" wrote in message
news:p06fz11bnp7.fsf@lnx104.hrz.tu-darmstadt.de...
> "Michael Hopper" writes:
>
>> I am interested in finding out how to coat magnetic particles (mostly
>> iron
>> based) that are between 50 and 150 microns in diameter. I would like a
>> process that allowed the coating to completely cover the exposed surface
>> or
>> only cover about 40% of the surface. It would be great if the polymeric
>> material could be varied such that it was halide rich (fluorinated
>> polymer)
>> or an amino polymer. An organic solvent free process is preferred.
>
> Perhaps a process like the one described in
> http://elib.tu-darmstadt.de/diss/000377/ could be used (english
> abstract at the end of the page). The work was supervised by
> Prof. Horst Hahn at the Technical University Darmstadt.
>
> Regards,
> Oliver
>
>
Oliver
Thanks for the citation. I am not sure I am equipped to perform the task in
that manner but will look into it more deeply.
mike
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| | From: | Dr. Mike | | Subject: | Re: Polymer coatings for magnetic particles about 100 microns in size | | Date: | 15 Jan 2005 19:38:19 -0800 |
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| Michael Hopper wrote:
> I am interested in finding out how to coat magnetic particles (mostly
iron
> based) that are between 50 and 150 microns in diameter. I would like
a
> process that allowed the coating to completely cover the exposed
surface or
> only cover about 40% of the surface. It would be great if the
polymeric
> material could be varied such that it was halide rich (fluorinated
polymer)
> or an amino polymer. An organic solvent free process is preferred.
>
> mike
Try agitating the particles in a Parylene chamber. Formulations include
Cl and F. Completely solvent free.
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