Layer-by-layer assembly of graphene oxide membranes via electrostatic interaction and eludication of water and solute transport mechanisms
A method for synthesizing a water purification membrane is presented. The method includes stacking a plurality of graphene oxide (GO) nanosheets to create the water purification membrane, the stacking involving layer-by-layer assembly of the plurality of GO nanosheets and forming a plurality of nanochannels between the plurality of GO nanosheets for allowing the flow of a fluid and for rejecting the flow of contaminants. The method further includes cross-linking the plurality of GO nanosheets by 1,3,5-benzenetricarbonyl trichloride on a polydopamine coated polysulfone support.
1. A method for creating a water separation membrane, the method comprising:
depositing a plurality of graphene oxide (GO) nanosheets via a layer-by-layer assembly;
bonding the plurality of GO nanosheets with each other and with a support substrate; and
cross-linking the plurality of GO nanosheets by 1,3,5-benzenetricarbonyl trichloride on the support substrate.
2. The method of claim 1 , further comprising covalently bonding the plurality of GO nanosheets via cross-linkers.
3. The method of claim 1 , wherein the cross-linkers are monomers and polymers.
4. The method of claim 1 , further comprising electrostatically bonding the plurality of GO nanosheets.
5. The method of claim 4 , wherein a structure, a charge, and a functionality of the plurality of GO nanosheets is tuned by using polyelectrolytes.
6. The method of claim 1 , wherein the support substrate is a polydopamine coated polysulfone support substrate.
7. The method of claim 1 , wherein the plurality of GO nanosheets are negatively charged.
8. The method of claim 1 , further comprising forming a plurality of nanochannels between the plurality of GO nanosheets for allowing the flow of a fluid and for rejecting the flow of contaminants.
9. A method for creating a water separation membrane, the method comprising:
depositing a plurality of graphene oxide (GO) nanosheets via a layer-by-layer assembly;
electrostatically bonding the plurality of GO nanosheets with each other and with a support substrate; and
tuning a structure, a charge and functionality of the plurality of GO nanosheets by using electrolytes.
10. The method of claim 9 , wherein the support substrate is a polydopamine coated polysulfone support substrate.
11. The method of claim 9 , further comprising covalently bonding the plurality of GO nanosheets via cross-linkers.
12. The method of claim 11 , wherein the cross-linkers are monomers and polymers.
13. The method of claim 9 , further comprising cross-linking the plurality of GO nanosheets by 1,3,5-benzenetricarbonyl trichloride on the support substrate.
14. The method of claim 9 , wherein the plurality of GO nanosheets are negatively charged.
15. The method of claim 9 , further comprising forming a plurality of nanochannels between the plurality of GO nanosheets for allowing the flow of a fluid and for rejecting the flow of contaminants.