Nanobiocatalyst and nanobiocatalytic membrane

Patent metadata

Field	Value
Publication number	US-11266955-B2
Application number	US-201816484584-A
Country	US
Kind code	B2
Filing date	Jan 30, 2018
Priority date	Feb 10, 2017
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A nanobiocatalytic membrane for a filtration system is provided which includes a filtration membrane and a plurality of nanobiocatalyst nanoparticles associated with the membrane, each of the nanobiocatalyst nanoparticles including a core, a coating at least partially surrounding the core, and a plurality of nanobiocatalysts coupled to the coating. Each of the plurality of nanobiocatalysts includes an antibacterial nanoparticle comprising bismuth, and a quorum quenching agent coupled to the antibacterial nanoparticle. A nanobiocatalyst nanoparticle for use with a water purification system is also provided. A method of forming a nanobiocatalytic membrane for a filtration system and a method of using a nanobiocatalytic membrane in a filtration system are also provided.

First claim

What is claimed is:

1. A nanobiocatalytic membrane for a filtration system, the nanobiocatalytic membrane comprising:
a filtration membrane;
a plurality of nanobiocatalyst nanoparticles associated with the membrane, each of the nanobiocatalystnanoparticles comprising;
a core;
a coating at least partially surrounding the core;
a plurality of nanobiocatalysts coupled to the coating, each of the plurality of nanobiocatalysts comprising:
an antibacterial nanoparticle comprising bismuth; and
a quorum quenching agent coupled to the antibacterial nanoparticle.

2. The nanobiocatalytic membrane of claim 1 , wherein the membrane includes pores having an average pore size and the plurality of nanobiocatalyst nanoparticles has an average diameter less than the average pore size.

3. The nanobiocatalytic membrane of claim 1 , wherein the core comprises a ferromagnetic material.

4. The nanobiocatalytic membrane of claim 1 , wherein the antibacterial nanoparticle comprises lipophilic bismuth dimercaptopropanol.

5. The nanobiocatalytic membrane of claim 1 , wherein the quorum quenching agent is a quorum quenching enzyme.

6. The nanobiocatalytic membrane of claim 5 , wherein the quorum quenching enzyme is acylase or lactonase.

7. The nanobiocatalytic membrane of claim 1 , wherein the quorum quenching agent is immobilized on the antibacterial nanoparticle.

8. The nanobiocatalytic membrane of claim 7 , wherein the quorum quenching agent is immobilized on the antibacterial nanoparticle via glutaraldehyde.

9. The nanobiocatalytic membrane of claim 1 , wherein the filtration membrane comprises nanobiocatalysts independently associated with a membrane surface.

10. The nanobiocatalytic membrane of claim 1 , wherein the membrane has a first membrane surface and a second membrane surface opposite the first membrane surface, and wherein the membrane is a porous membrane with a plurality of pores extending therethrough from the first membrane surface to the second membrane surface.

11. The nanobiocatalytic membrane of claim 10 , wherein the membrane is an ultrafiltration membrane.

12. The nanobiocatalytic membrane of claim 10 , wherein the membrane is made of polyvinylidene difluoride.

13. The nanobiocatalytic membrane of claim 1 , wherein the coating that at least partially surrounds the core includes a mesoporous silica outer layer.

14. The nanobiocatalytic membrane of claim 13 , wherein the plurality of nanobiocatalysts are attached to the mesoporous silica outer layer.

15. The nanobiocatalytic membrane of claim 1 , wherein the plurality of nanobiocatalysts are formed from ions irradiated with ultraviolet light which nucleate into bismuth nanoparticles.

16. The nanobiocatalytic membrane of claim 15 , wherein the coating that at least partially surrounds the core is formed of a silica outer layer.

17. The nanobiocatalytic membrane of claim 16 , wherein the plurality of nanobiocatalysts are attached to the silica outer layer.

Assignees

• Univ Of Vermont And State Agricultural College

Inventors

• Badireddy Appala Raju
• Lu Huijie

Classifications

• B01D61/149

  Multistep processes comprising different kinds of membrane processes selected from ultrafiltration or microfiltration · CPC title

• B01D61/029

  Multistep processes comprising different kinds of membrane processes selected from reverse osmosis, hyperfiltration or nanofiltration · CPC title

• B01D71/024

  Oxides · CPC title

• B01D69/145 Primary

  containing embedded catalysts · CPC title

• B01D2315/10

  Cross-flow filtration · CPC title