Highly asymmetric, hydrophilic, microfiltration membranes...

Details Highly asymmetric, hydrophilic, microfiltration membranes... Highly asymmetric, hydrophilic, microfiltration membranes...

2006-10-24

2006-10-24

Fortuna, Ana (Department: 1723)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S321750, C210S321840, C436S178000, C436S177000, C436S170000, C422S067000, C422S105000

Reexamination Certificate

active

07125493

ABSTRACT:
The present invention relates to the field of synthetic polymeric microfiltration membrane materials that are fabricated to separate liquids from solids contained therein. One aspect of the invention relates to a highly asymmetric, hydrophilic microfiltration membrane with high surface porosity. The membrane is rendered hydrophilic through co-casting the sulfone polymer with a hydrophilic polymer, such as polyvinylpyrrolidone. The membranes of the invention are highly useful in testing devices for the quick detection of properties or components contained in liquid samples, such as diagnostic applications, as well as for other filtration applications that demand relatively large pore sizes, thick membranes, high asymmetry, and/or high lateral wicking speeds.

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