UV-assisted grafting of PES and PSF membranes

Details UV-assisted grafting of PES and PSF membranes UV-assisted grafting of PES and PSF membranes

2005-02-08

2005-02-08

Berman, Susan (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

C522S085000, C522S078000, C522S079000, C522S080000, C210S490000

Reexamination Certificate

active

06852769

ABSTRACT:
An ultrafiltration membrane is modified to exhibit low protein fouling and yet maintains a greater fraction of the original membrane permeability and retention properties after modification. This is achieved by grafting monomer onto the surface of a highly photoactive membrane such as polyethersulfone, via the process of dipping the polymeric membrane into a solution containing one or more monomers and a chain transfer agent, removing the membrane from the solution, securing the membrane inside of a quartz vessel contained within another vessel of liquid filter, and irradiating the membrane with a UV light at a wavelength between the range of 280 nm and 300 nm. High density grafting and shorter grafted monomer chain length result in low protein fouling and retention of permeability.

REFERENCES:
patent: 4666991 (1987-05-01), Matsui et al.
patent: 5021160 (1991-06-01), Wolpert
patent: 5468390 (1995-11-01), Crivello et al.
patent: 5883150 (1999-03-01), Charkoudian
patent: 5942555 (1999-08-01), Swanson et al.

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