Filters and methods of making and using the same
AssigneeGeorgia Tech Research Corporation
InventorsDaniel P. Campbell, Jim Suggs, Jeffrey L. Moore, Srinivas Somayajula, Thomas R. Mohs
Life of this patent
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Abstract
Filters for removing particulate and gaseous organic and inorganic materials from a fluid stream are disclosed. The filters may contain a polymer matrix and optional sequestering agents. Methods of making filters are also disclosed. Methods of using filters to remove one or more materials from a fluid stream, such as an air stream, are also disclosed.
Claims21
A method of removing particles or one or more volatile or semi-volatile compounds from a fluid stream, said method comprising the steps of:
- bringing the fluid stream into contact with a filter, wherein the filter comprises an absorptive system containing at least one acidic polymer, at least one basic polymer, or a combination of at least one acidic polymer and at least one basic polymer physically separated from one another.
A filter comprising an absorptive system comprising a polymer chain having acidic or basic groups along the polymer chain comprising polystyrene sulfonic acid.
A filter comprising:
- an absorptive system containing at least one acidic polymer, at least one basic polymer, or a combination of at least one acidic polymer and at least one basic polymer physically separated from one another;
- a substrate, wherein the absorptive system coats at least a portion of an outer surface of the substrate;
- and
- an optional housing to at least partially contain the absorptive system, the substrate or both.
A filter comprising an absorptive system comprising:
- (i) a first layer containing a polymer chain having acidic or basic groups along the polymer chain, and
- (ii) a second layer containing one or more hydroscopic polymers, wherein the first layer is separate from and in contact with the second layer.
A filter comprising an absorptive system comprising:
- (i) an acidic/basic polymer selected from the group consisting of polystyrene sulfonic acid, polyvinyl sulfonic acid, poly(acrylic acid), polyethyleneimine, ethoxylated polyethyleneimine, poly(2-vinylphenol), sol gels having acidic or basic groups thereon, orgosils having acidic or basic groups thereon, and combinations thereof;
- (ii) one or more hygroscopic polymers selected from the group consisting of polyethylene glycols, poly(2-hydroxyethyl methacrylate), polypentaerythritol ethoxylate, poly(N,N-dimethyl-3,5,dimethylene) piperidium chloride, quaternized polyimidazoline, polyacrylamide, and combinations thereof;
- and
- (iii) one or more reactive additives selected from the group consisting of catalytic reactants, stoichiometric reactants, catalytic/stoichiometric reactants, acid-scavenging agents, base-scavenging agents, reactive nanoparticles, water, and a combination thereof.
Dependencies are inferred from the claim text.