Fluorinated silica microchannel surfaces

Measuring and testing – Volume or rate of flow – Expansible chamber

Reexamination Certificate

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Reexamination Certificate

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06865939

ABSTRACT:
A method for surface modification of microchannels and capillaries. The method produces a chemically inert surface having a lowered surface free energy and improved frictional properties by attaching a fluorinated alkane group to the surface. The coating is produced by hydrolysis of a silane agent that is functionalized with either alkoxy or chloro ligands and an uncharged C3-C10fluorinated alkane chain. It has been found that the extent of surface coverage can be controlled by controlling the contact time from a minimum of about 2 minutes to a maximum of 120 minutes for complete surface coverage.

REFERENCES:
patent: 4121463 (1978-10-01), Argabrite
patent: 5726247 (1998-03-01), Michalczyk et al.
patent: 5756207 (1998-05-01), Clough et al.
patent: 5876571 (1999-03-01), Buck
patent: 6409900 (2002-06-01), Parce et al.
patent: 6479374 (2002-11-01), Ioka et al.
patent: 6727182 (2004-04-01), Akahori et al.
Gelest Inc. Product Bulletin, 2001.

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