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US 12,492,509 B2Granted
Gravity-driven chitosan-enhanced melamine sponge for stable ultrafast filtration
AssigneeVersitech Limited
InventorsXiaoyan Li, Haibo Li
Life of this patent
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Abstract
Devices and methods related to a chitosan-enhanced melamine sponge are provided. A method comprises grafting chitosan on the melamine sponge matrix via the chemical with two or more carboxyl groups; and crosslinking the chitosan with crosslinker under a heating procedure to make a more robust melamine sponge with a larger surface and smaller pores. The chitosan-enhanced melamine sponge is used to separate chemicals from water as a gravity flow-driven filter, and it can be compressed and backwashed for regeneration.
Claims18
A method of making a chitosan-enhanced melamine sponge, comprising:
- grafting chitosan on a melamine sponge matrix using an acidic chemical with two or more carboxyl groups;
- and
- crosslinking the chitosan with a crosslinker under heat to make the chitosan-enhanced melamine sponge having a larger surface and smaller pores than the melamine sponge matrix.
Dependencies are inferred from the claim text.