Poly(amino-alcohol)-silica hybrid compositions and membranes
The present invention provides a method for making a hybrid composition membrane comprising the steps of preparing a sol comprising at least one poly(amino-alcohol) and at least one alkoxy silane, casting the sol on a surface and drying the casted sol to form the hybrid composition membrane. The hybrid composition membrane may be used for capturing and separating CO 2 and/or H 2 S from a gas sample.
1. A method for making an organic-inorganic hybrid composition membrane comprising the steps of:
preparing a sol comprising at least one poly(amino-alcohol), at least one aminoalkyl alkoxysilane;
casting the sol onto a surface; and
drying the sol to form the organic-inorganic hybrid composition membrane.
2. The method of claim 1 wherein the poly(amino-alcohol) is poly(vinyl alcohol-co-vinyl amine).
3. The method of claim 1 wherein the sol comprises from about 5 wt % to about 40 wt % of the poly(amino-alcohol).
4. The method of claim 1 wherein the aminoalkyl alkoxysilane is 3-aminopropyltriethyoxysilane, aminoethylaminopropyltrimethoxysilane, (3-trimethoxysilylpropyl)diethylenetriamine, 2-(trimethoxysilylethyl)pyridine, N-(trimethoxysilylethyl)benzyl-N,N-dimethylamine, N-(trimethoxysilylpropyl)isothiouronium chloride or combinations thereof.
5. The method of claim 1 wherein the sol comprises from about 5 wt % to about 40 wt % of the aminoalkyl alkoxysilane.
6. The method of claim 1 wherein the sol further comprises at least one low molecular weight or oligomeric/polymeric amine.
7. The method of claim 1 wherein the poly(amino-alcohol) and the aminoalkyl alkoxysilane are crosslinked.
8. An organic-inorganic hybrid composition membrane made by the method of claim 1 .
9. The method of claim 1 wherein the surface is a porous ceramic support.
10. An organic-inorganic hybrid composition membrane-coated support made by the method of claim 9 .
11. A method for capturing or separating carbon dioxide or hydrogen sulfide from a gas comprising flowing the gas over or through the organic-inorganic hybrid composition membrane-coated support of claim 10 .
12. An organic-inorganic hybrid composition membrane comprising at least one poly(amino-alcohol) and at least one poly(aminoalkyl siloxane).
13. The organic-inorganic hybrid composition membrane of claim 12 wherein the poly(amino-alcohol) is poly(vinyl alcohol-co-vinyl amine).
14. The organic-inorganic hybrid composition membrane of claim 12 wherein the poly(aminoalkyl siloxane) is poly(3-aminopropylsiloxane), poly(aminoethylaminopropylsiloxane), poly((3-siloxane propyl)diethylenetriamine), poly(2-(siloxane ethyl)pyridine), poly(N-(siloxane ethyl)benzyl-N,N-dimethylamine), poly(N-(siloxane propyl)isothiouronium chloride) or combinations thereof.
15. The organic-inorganic hybrid composition membrane of claim 12 wherein the membrane further comprises at least one low molecular weight or oligomeric/polymer amine.
16. The organic-inorganic hybrid composition membrane of claim 12 wherein the poly(amino-alcohol) and the poly(aminoalkyl siloxane) are crosslinked.
17. The organic-inorganic hybrid composition membrane of claim 16 wherein the poly(amino-alcohol) and the poly(aminoalkyl siloxane) are crosslinked chemically, by radiation, thermally or a combination thereof.
18. A hybrid composition membrane-coated support comprising a porous ceramic support coated with the organic-inorganic hybrid composition membrane of claim 12 .