A substrate having an antibacterial surface includes a chitosan matrix and water-stable metal-organic frameworks dispersed throughout the chitosan matrix. The water-stable metal-organic frameworks are present in an amount of 5% wt/wt to 20% wt/wt based on total solids of the substrate.

A bio-functional air filter medium is provided with a first filter layer that retains particles and at least one bio-functional carrier coated with or having embedded therein antimicrobial material and an anti-allergenic material. An air filter element having the bio-functional air filter medium is also disclosed. The bio-functional air filter medium is adapted to bind and capture allergens and block metabolism of bacteria while filtering air in high flow, low pressure drop residential or HVAC applications.

A bio-functional air filter medium is provided with a at least one particle filtration layer that retains particles and at least one bio-functional carrier coated with or having embedded therein antimicrobial, anti-viral and anti-allergenic materials. An air filter element having the bio-functional air filter medium is also disclosed. The bio-functional air filter medium is adapted to bind and capture allergens and block metabolism of bacteria, and provide anti-viral activity to effectively inhibit/deactivate viruses, all while filtering air in high flow, low pressure drop residential, HVAC or air purifier applications.

A deodorant composition may be suitable for use with an aldehyde gas or a ketone gas, and may include an aminoguanidine salt and a metal chelating agent. The aminoguanidine salt is preferably at least one of an aminoguanidine hydrochloride and an aminoguanidine sulfate. The chelating agent is preferably at least one of an inorganic phosphoric acid and salt thereof, and a carboxylic acid and salt thereof.

A self-disinfecting antiviral filter material 10 includes an air-permeable carrier 11 and a composite coating 12 including at least one color pigment 13 with antiviral activity and an inorganic matrix material 14 bonded to the carrier 11. The at least one color pigment 13 preferably includes at least one compound from the group of phthalocyanines. The matrix material is preferably selected from the group including metal oxides. An air filter device including the self-disinfecting antiviral filter material, a method of manufacturing the filter material, and a method of inactivating viruses are also described.

Described herein are antimicrobial nanoclay comprising two or more cationic antimicrobials. The nanoclay is a phyllosilicate clay and the two or more cationic antimicrobials are individually selected from the group consisting of a quaternary ammonium compound, a metal ion-containing, a cationic chelating agent, a cationic amino acid-based surfactant, a cationic antibiotic, and a cationic compound having a guanidine moiety. The two or more different antimicrobials are incorporated into the nanoclay by a cationic exchange process. Also described are methods for preparing such antimicrobial nanoclays. The antimicrobial nanoclays may be used for conferring antimicrobial activity to an article of manufacture and/or for providing antimicrobial activity to a surface.

A substrate having an antibacterial surface includes a chitosan matrix and water-stable metal-organic frameworks dispersed throughout the chitosan matrix. The water-stable metal-organic frame-works are present in an amount of 5% wt/wt to 20% wt/wt based on total solids of the substrate

A deodorant composition may be suitable for use with an aldehyde gas or a ketone gas, and may include an aminoguanidine salt and a metal chelating agent. The aminoguanidine salt is preferably at least one of an aminoguanidine hydrochloride and an aminoguanidine sulfate. The chelating agent is preferably at least one of an inorganic phosphoric acid and salt thereof, and a carboxylic acid and salt thereof.

A coated article having an antimicrobial coating is provided. The coated article includes a substrate and at least one adhesion layer disposed over the substrate. The at least one adhesion layer includes a component selected from the group consisting of a copper oxide, a zirconium oxide, and combinations thereof. Advantageously, an antimicrobial copper suboxide layer disposed over the at least one adhesion layer.

A substrate having an antibacterial surface includes a chitosan matrix and water-stable metal-organic frameworks dispersed throughout the chitosan matrix. The water-stable metal-organic frameworks are present in an amount of 5% wt/wt to 20% wt/wt based on total solids of the substrate.