Active polymeric filters
View Patent ↗A compound includes a polymer where the polymer includes a pendant dioxirane moiety. Cost-effective, facilitated generation of a polymer including a pendant dioxirane moiety allows for the compound to be disposable or be easily recycled. The compound can be used in air purification and liquid purification to not only remove particulate matter, but also to destroy microorganisms and remove volatile organic compounds.
1. A process of gas purification comprising passing a gas through a filter, wherein the filter comprises a polymer comprising a pendant dioxirane moiety represented by Formula I or II:
wherein:
the carbon atom of Formula II is in a polymer chain of the polymer;
R 1 is alkylene, perhaloalkylene, carbonyl, carboxyl, alkylcarboxyl, carboxyalkyl, or alkylcarboxyalkyl;
R 2 is an electron withdrawing group; and
R 3 is H, alkyl, perhaloalkyl, cycloalkyl, aryl, heteroaryl, heterocyclyl, amino, carbonyl, carboxyl, alkylcarboxy, carboxyalkyl or alkylcarboxyalkyl.
2. The process of claim 1 , wherein the gas comprises a biological contaminant or a chemical contaminant.
3. The process of claim 1 further comprising recycling the filter comprising exposing the filter to a solution comprising a peroxymonosulfate.
4. The process of claim 1 , wherein the pendant dioxirane moiety is represented by Formula I, and wherein:
R 2 is —N + R 4 R 5 R 6 , halogen, NO 2 , C(O)H, CO 2 R 7 , alkoxy, or perhaloalkyl;
R 4 is H, alkyl, or cycloalkyl;
R 5 is H, alkyl, or cycloalkyl;
R 6 is H, alkyl, or cycloalkyl; and
R 7 is H, alkyl, or cycloalkyl.
5. The process of claim 1 , wherein the pendant dioxirane moiety is represented by Formula I, and wherein R 2 is perfluoroalkyl.
6. The process of claim 1 , wherein the polymer is a polyolefin, a polyalkylene terephthalate, a polyacrylate, a polylactates, a polycarbonate, a polyester, a polysaccharide, a polyacetate, a polystyrene maleic anhydride, a polyurethane, a polyamide, a polyacrylamide, a polymethacrylates, a poly(methyl)methacrylate, an aramid, a co-polymer of any two or more such polymers, or a blend of any two or more such polymers.
7. The process of claim 1 , wherein the pendant dioxirane moiety is represented by Formula II.
8. A process of liquid purification comprising passing a liquid through a filter, wherein the filter comprises a polymer comprising a pendant dioxirane moiety represented by Formula I or II:
wherein:
the carbon atom of Formula II is in a polymer chain of the polymer;
R 1 is alkylene, perhaloalkylene, carbonyl, carboxyl, alkylcarboxyl, carboxyalkyl, or alkylcarboxyalkyl;
R 2 is an electron withdrawing group; and
R 3 is H, alkyl, perhaloalkyl, cycloalkyl, aryl, heteroaryl, heterocyclyl, amino, carbonyl, carboxyl, alkylcarboxy, carboxyalkyl or alkylcarboxyalkyl.
9. The process of claim 8 , wherein the liquid comprises a biological contaminant or a chemical contaminant.
10. The process of claim 8 further comprising recycling the filter comprising exposing the filter to a solution comprising a peroxymonosulfate.
11. The process of claim 8 , wherein the pendant dioxirane moiety is represented by Formula I, and wherein:
R 2 is —N + R 4 R 5 R 6 , halogen, NO 2 , C(O)H, CO 2 R 7 , alkoxy, or perhaloalkyl;
R 4 is H, alkyl, or cycloalkyl;
R 5 is H, alkyl, or cycloalkyl;
R 6 is H, alkyl, or cycloalkyl; and
R 7 is H, alkyl, or cycloalkyl.
12. The process of claim 8 , wherein the pendant dioxirane moiety is represented by Formula I, and wherein R 2 is perfluoroalkyl.
13. The process of claim 8 , wherein the polymer is a polyolefin, a polyalkylene terephthalate, a polyacrylate, a polylactates, a polycarbonate, a polyester, a polysaccharide, a polyacetate, a polystyrene maleic anhydride, a polyurethane, a polyamide, a polyacrylamide, a polymethacrylates, a poly(methyl)methacrylate, an aramid, a co-polymer of any two or more such polymers, or a blend of any two or more such polymers.
14. The process of claim 8 , wherein the pendant dioxirane moiety is represented by Formula II.
15. A process of gas purification comprising passing a gas through a filter, wherein the filter comprises a polymer comprising a pendant dioxirane moiety represented by Formula I:
wherein:
R 1 is alkylene, perhaloalkylene, carbonyl, carboxyl, alkylcarboxyl, carboxyalkyl, or alkylcarboxyalkyl;
R 2 is —N + R 4 R 5 R 6 , halogen, NO 2 , C(O)H, CO 2 R 7 , alkoxy or perhaloalkyl;
R 3 is H, alkyl, perhaloalkyl, cycloalkyl, aryl, heteroaryl, heterocyclyl, amino, carbonyl, carboxyl, alkylcarboxy, carboxyalkyl or alkylcarboxyalkyl;
R 4 is H, alkyl, or cycloalkyl;
R 5 is H, alkyl, or cycloalkyl;
R 6 is H, alkyl, or cycloalkyl; and
R 7 is H, alkyl, or cycloalkyl.
16. The process of claim 15 , wherein R 2 is perfluoroalkyl.
17. The process of claim 15 , wherein the polymer is a polyolefin, a polyalkylene terephthalate, a polyacrylate, a polylactates, a polycarbonate, a polyester, a polysaccharide, a polyacetate, a polystyrene maleic anhydride, a polyurethane, a polyamide, a polyacrylamide, a polymethacrylates, a poly(methyl)methacrylate, an aramid, a co-polymer of any two or more such polymers, or a blend of any two or more such polymers.
18. The process of claim 15 , wherein the gas comprises a biological contaminant or a chemical contaminant.
19. The process of claim 15 further comprising recycling the filter comprising exposing the filter to a solution comprising a peroxymonosulfate.
20. A process of gas purification comprising passing a gas through a filter, wherein the filter comprises a polymer comprising a pendant dioxirane moiety represented by Formula IV:
wherein:
the carbon atom of Formula IV is in a polymer chain of the polymer;
R 8 is —N + R 4 R 5 or alkyl;
R 9 is —N + R 4 R 5 or alkyl;
each R 4 is independently H, alkyl, or cycloalkyl; and
each R 5 is independently H, alkyl, or cycloalkyl.