Entegris, Inc.

Jeffrey E Townley

Maybelle Woo

Jad Ali Jaber

James Hamzik

Saksatha Ly

Justin Brewster

Kwok-Shun Cheng

Described are ion-exchange membranes that include a porous polymeric membrane and imidazole ion-exchange groups at surfaces of the membrane; ion-exchange membranes and filters that contain the ion-exchange membranes; and methods of using the ion-exchange membranes and filters for separating charged biological molecule from a liquid.

Ion-exchange membranes, filters, and methods

Described herein is a polyamide hollow fiber membrane and methods of making and using the hollow fiber membrane. The polyamide hollow fiber membrane has an isopropanol permeability of from about 5 L/m2 h bar to about 150 L/m2 h bar and a particle rejection percentage of about 100% for particles having a nominal diameter of from about 1 nm to about 25 nm. The polyamide hollow fiber membranes described herein are particularly useful for photoresist filtration, for example.

Highly retentive polyamide hollow fiber membranes produced via controlled shrinkage

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Townsend, MA, United States of America

Jeffrey E Townley