Hydrophilic polymer coating of high pH stability for silica surf

Details Hydrophilic polymer coating of high pH stability for silica surf Hydrophilic polymer coating of high pH stability for silica surf

1991-12-06

1993-06-22

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204299R, G01N 2726, G01N 27447

Patent

active

052214478

ABSTRACT:
Silica-containing surfaces, such as the inner wall of a quartz or fused silica capillary used in capillary electrophoresis, are activated by a suitable linking agent which combines with the silanol groups on the surface to form Si--O--Si linkages leaving vinyl or acryl groups on the linking agent exposed for further reaction. A suitably derivatized hydrophilic polymer is then coupled to the linking agent to from a polymeric coating over the surface. The coating remains hydrophilic throughout the coupling process, and the coupling is unusually stable at pH's of 12 and above.

REFERENCES:
patent: 4680201 (1987-07-01), Hjerten
patent: 4690749 (1987-09-01), Van Alstine et al.
patent: 5082559 (1992-01-01), Eguchi et al.

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