Antimicrobial Composite Material
AssigneeCorning Incorporated
InventorsGuohua Chen, Dayue Jiang, Joydeep Lahiri, Florence Verrier, Jianguo Wang, Ying Wei
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Abstract
The present disclosure is directed to an antimicrobial composite material, and more particularly to an antimicrobial composite material comprising particles having a metal or metal alloy core and a porous inorganic material shell, coatings including the antimicrobial composite material, and methods of making the same. In some embodiments, Cu—SiO2 core-shell particles are disclosed in which the Cu core provides antimicrobial activity and the porous SiO2 shell functions as a barrier for the Cu core, thus preventing the Cu core from being directly exposed to air or moisture.
Claims26
An antimicrobial composite material comprising a plurality of particles, each particle comprising:
- a substantially interior portion comprising copper;
- and
- a substantially exterior portion comprising porous silica at least partially surrounding the interior portion, wherein the exterior portion has an inner surface defining an internal cavity and an outer surface defining at least a part of the outer portion of the antimicrobial composite material, wherein at least part of the interior portion is located in the internal cavity, wherein the average thickness from the inner surface of the exterior portion to the outer surface of the exterior portion is from about 0.01 to about 100 nm, wherein the molar ratio of the copper to the silica is about 1:1 or greater, and wherein the particles have an average size in the range of from about 400 nm to about 5 microns.
An article comprising an antimicrobial composite material comprising a plurality of particles, each particle comprising:
- a substantially interior portion comprising copper;
- and
- a substantially exterior portion comprising porous silica at least partially surrounding the interior portion, wherein the exterior portion has an inner surface defining an internal cavity and an outer surface defining at least a part of the outer portion of the antimicrobial composite material, wherein at least part of the interior portion is located in the internal cavity, wherein the average thickness from the inner surface of the exterior portion to the outer surface of the exterior portion is from about 0.01 to about 100 nm, wherein the molar ratio of the interior portion to the exterior portion is about 1:1 or greater, and wherein the particles have an average size in the range of from about 400 nm to about 5 microns.
A coating comprising an antimicrobial composite material comprising a plurality of particles, each particle comprising:
- a substantially interior portion comprising copper;
- and
- a substantially exterior portion comprising porous silica at least partially surrounding the interior portion, wherein the exterior portion has an inner surface defining an internal cavity and an outer surface defining at least a part of the outer portion of the antimicrobial composite material, wherein at least part of the interior portion is located in the internal cavity,
- wherein the average thickness from the inner surface of the exterior portion to the outer surface of the exterior portion is from about 0.01 to about 100 nm,
- wherein the molar ratio of the interior portion to the exterior portion is about 1:1 or greater, wherein the particles have an average size in the range of from about 400 nm to about 5 microns,
- wherein a the particles are dispersed in a polymer carrier, and
- wherein the coating has a log reduction of ≧1.
A method comprising:
- synthesizing an antimicrobial composite material comprising a plurality of particles, each particle comprising:
- a substantially interior portion comprising copper;
- and
- a substantially exterior portion comprising porous silica at least partially surrounding the interior portion, wherein the exterior portion has an inner surface defining an internal cavity and an outer surface defining at least a part of the outer portion of the antimicrobial composite material, wherein at least part of the interior portion is located in the internal cavity;
- and
- dispersing the particles in a carrier.
Dependencies are inferred from the claim text.