Two-dimensional metal carbide antimicrobial membrane and antimicrobial agent

Patent metadata

Field	Value
Publication number	US-10399041-B2
Application number	US-201615769632-A
Country	US
Kind code	B2
Filing date	Oct 14, 2016
Priority date	Nov 17, 2014
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

The antimicrobial agent includes at least one two-dimensional metal carbide layer. The two-dimensional metal carbide has the formula Tin+1CnTx, where T represents a terminal functional group and x represents the number of terminal functional groups. The two-dimensional metal carbide is preferably Ti3C2Tx. The terminating group may be oxygen, hydroxide (OH), fluorine or combinations thereof. The antimicrobial agent may be used as a two-dimensional metal carbide antimicrobial membrane (10) or filter for removal of harmful bacteria, such as E. coli and B. subtilis. A stack of two-dimensional metal carbide layers (14) may be supported on a polymer filter substrate (12), such as a polyvinylidene fluoride (PVDF) supporting substrate.

First claim

We claim:

1. A method of treating water for reduction of bacterial contamination, comprising the steps of:
providing an antimicrobial agent, the antimicrobial agent comprising MXenes, wherein the MXene is selected from the group consisting of at least one two-dimensional metal carbide layer, carbonitride layer, and nitride layer, the MXenes having the formula M n+1 X n T x , where M is an early transition metal, X is either C or N, n is 1, 2, or 3, T represents a terminal functional group, and x represents the number of terminal functional groups, wherein the terminal functional group comprises at least one functional group selected from the group consisting of O, OH, and F;
providing a substrate;
coating the substrate with at least one layer of the antimicrobial agent to form an antimicrobial membrane;
adding the antimicrobial membrane to the contaminated water to form a colloidal suspension; and
allowing the colloidal suspension to incubate for a period of time sufficient to reduce levels of bacterial contamination in the water.

2. The method of treating water according to claim 1 , wherein said step of adding the antimicrobial membrane further comprises adding the antimicrobial membrane to obtain a concentration of at least 100 μg/ml.

3. The method of treating water according to claim 1 , wherein said step of adding the antimicrobial membrane further comprises adding the antimicrobial membrane to obtain a concentration of at least 200 μg/ml.

4. The method of treating water according to claim 1 , wherein said step of allowing the colloidal suspension to incubate for a period of time further comprises allowing the colloidal suspension to incubate for about 4 hours.

5. The method of treating water according to claim 1 , wherein the XMene is a two-dimensional metal carbide having the formula Ti 3 C 2 T x .

6. A method of making an antimicrobial membrane, comprising the steps of:
providing an antimicrobial agent, the antimicrobial agent comprising MXenes, wherein the MXene is selected from the group consisting of at least one two-dimensional metal carbide layer, carbonitride layer, and nitride layer, the MXenes having the formula M n+1 X n T x , where M is an early transition metal, X is either C or N, n is 1, 2, or 3, T represents a terminal functional group, and x represents the number of terminal functional groups, wherein the terminal functional group comprises at least one functional group selected from the group consisting of O, OH, and F;
providing a substrate; and
filtering a dilute colloidal solution of the MXenes on the substrate by vacuum filtration to form the membrane.

7. The method of protecting a substrate according to claim 6 , wherein said substrate comprises a polymer.

8. The method of protecting a substrate according to claim 6 , wherein said substrate comprises a polyvinylidene fluoride (PVDF) membrane support.

9. The method of making the antimicrobial membrane according to claim 6 , wherein the XMene is a two-dimensional metal carbide having the formula Ti 3 C 2 T x .

Assignees

• Qatar Found Education Science & Community Dev

Inventors

• Rasool Kashif
• Mahmoud Khaled Ahmed

Classifications

• B01D67/0088

  Physical treatment with compounds, e.g. swelling, coating or impregnation · CPC title

• B01D65/08

  Prevention of membrane fouling or of concentration polarisation · CPC title

• B01D69/02

  characterised by their properties · CPC title

• C02F1/50

  by addition or application of a germicide or by oligodynamic treatment {(C02F1/4606, C02F1/467, C02F1/76 take precedence)} · CPC title

• B01D2323/10

  Specific pressure applied · CPC title