CHITOSAN-GRAPHENE OXIDE MEMBRANES AND PROCESS OF MAKING THE SAME
First Claim
1. A chitosan-graphene oxide composite membrane, comprising:
- a graphene oxide having a flake size between about 80 nm and about 105 nm in diameter, between about 0.3 μ
m and about 0.7 μ
m in diameter or a combination thereof; and
a denatured chitosan.
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Accused Products
Abstract
This invention relates generally to a chitosan-graphene oxide membrane and process of making the same. The nanocomposite membrane can filter water and remove contaminants without fouling like other commercially-available polymer-based water filters. The membrane can be used as a flat sheet filter or can be engineered in a spiral filtration module. The membrane is scalable and tunable for many water contaminants including pharmaceuticals, pesticides, herbicides, and other organic chemicals. The membrane uses chitosan, which is low-cost, renewable biopolymer typically considered to be a waste product and the second most abundant biopolymer on Earth, thus making the membrane an environmentally-friendly product choice.
2 Citations
16 Claims
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1. A chitosan-graphene oxide composite membrane, comprising:
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a graphene oxide having a flake size between about 80 nm and about 105 nm in diameter, between about 0.3 μ
m and about 0.7 μ
m in diameter or a combination thereof; anda denatured chitosan. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for making a chitosan-graphene oxide composite membrane, said process comprising the steps of:
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mixing graphene oxide with purified water, wherein said graphene oxide has a flake size between about 80 nm and about 105 nm in diameter, between about 0.3 μ
m and about 0.7 μ
m in diameter or a combination thereof;mixing chitosan with an acid; preparing a casting solution comprising said chitosan and said graphene oxide; evaporating said casting solution under reduced pressure to make said chitosan-graphene oxide composite membrane. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification