High strength organic-inorganic hybrid gel materials
First Claim
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1. A gel material comprising a polysaccharide and an inorganic network, said polysacchride covalently linking at least two atoms in said inorganic network.
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Abstract
Embodiments of the present invention describe hybrid aerogels comprising polymers covalently bonded to an inorganic network and methods for preparing the same. The inorganic network may comprise silica, alumina, titania, zirconia, ceria, yttria or a combination thereof, where silica is the preferred embodiment. The polymers preferably comprise chitosan, pyrrolidine complex of chitosan or any other derivatives of chitosan that are soluble in water, ethanol or combinations thereof.
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Citations
45 Claims
- 1. A gel material comprising a polysaccharide and an inorganic network, said polysacchride covalently linking at least two atoms in said inorganic network.
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14. A method for preparing a gel material comprising the steps of:
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mixing a polysaccharide with an inorganic gel precursor in a suitable solvent wherein said polysaccharide comprises alkoxysilyl groups;
forming a gel from the mixture; and
drying the gel. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method for preparing a gel material comprising the steps of:
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mixing a polysaccharide with an inorganic precursor and a cross-linker in a suitable solvent, said cross-linker and polysaccharide each comprising at least one isocyanate or isocyanate-reactive group;
forming a gel from the mixture; and
drying the gel. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification