Immobilized Filters for Air Filtration

摘要

This study will determine the feasibility of creating an immobilized bed of adsorbent particles using adhesives. The immobilized adsorbent will be designed for gas phase filtration in military respirators, in order to provide enhanced moldability (settling performance) and attrition resistance. The fabricated filter samples will be analyzed in order to determine the physical and chemical factors affecting mechanical strength and chemical filtration. Five different resin systems were studied in this work; epoxy/amine, vinyl- ester, water- borne epoxy/amine and two water-borne urethane pre-polymer. The first two resins are organic but epoxy/amine system is more hydrophilic than vinyl-ester. Samples were cured through temperature cycles appropriate for their corresponding resin. Optical microscopy was used to look at the samples and determine the extent of dispersion of resin with the activated carbon particles. Compressive and flexural properties of samples of activated carbon particles with water-borne resin systems were evaluated. This effort was focused on distinguishing between brittle failure and ductile failure of the samples.