Microwave initiation for deposition of porous organosilicate materials on fabrics

Patent metadata

Field	Value
Publication number	US-9689111-B2
Application number	US-201414209728-A
Country	US
Kind code	B2
Filing date	Mar 13, 2014
Priority date	Mar 14, 2013
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

Described herein are modification of fabrics using a microwave initiation technique to produce a porous coating on the fibers providing adsorbent properties as well as the potential for further modification. In embodiments, the fabric incorporates a periodic mesoporous organosilica compound (PMO) optionally bound to a porphyrin or other functional group, and/or a catalyst or optical indicator.

First claim

What is claimed is:

1. A method of treating fabric, the method comprising:
wetting a fabric in a first solution comprising tetraethylorthosilicate (TEOS) to obtain a precursor fabric, and
irradiating the precursor fabric with microwave radiation to obtain a TEOS functionalized fabric,
wherein said organosilica precursor comprises:
(1) bis(trimethoxysilyl)ethane (BTE) and 1,4-bis(trimethoxysilylethyl)benzene (DEB); or
(2) mesitylene and BTE.

2. The method of claim 1 , wherein said first solution further comprises ammonium hydroxide.

3. The method of claim 1 , further comprising:
dip-coating the TEOS functionalized fabric in a dip solution comprising surfactant and organosilica precursor to obtain dipped fabric, and
curing the dipped fabric to obtain a modified fabric.

4. The method of claim 3 , wherein said organosilica precursor comprises bis(trimethoxysilyl)ethane (BTE), the method further comprising chemically coupling a porphyrin to the BTE to obtain a porphyrin-functionalized fabric.

5. The method of claim 4 , wherein said porphyrin is selected from the group consisting of meso-tetra(4-carboxyphenyl) porphyrin and copper Deuteroporphyin IX.

6. The method of claim 1 , further comprising modifying the fabric with a functional group, catalyst, or optical indicator.

7. A modified fabric comprising:
a fabric in a state of being modified by wetting the fabric in a first solution comprising tetraethylorthosilicate (TEOS) to obtain a precursor fabric, irradiating the precursor fabric with microwave radiation to obtain a TEOS functionalized fabric, dip-coating the TEOS functionalized fabric in a dip solution comprising surfactant and organosilica precursor to obtain dipped fabric, and curing the dipped fabric to obtain a modified fabric.

8. The modified fabric of claim 7 , wherein a porphyrin is chemically coupled to the fabric.

9. The modified fabric of claim 7 , wherein a functional group, catalyst, or optical indicator is chemically coupled to the fabric.

10. A garment comprising the modified fabric of claim 7 .

11. A shelter comprising the modified fabric of claim 7 .

12. A filter comprising the modified fabric of claim 7 .

13. A modified fabric comprising:
a fabric in a state of being modified by wetting the fabric in a first solution comprising tetraethylorthosilicate (TEOS) to obtain a precursor fabric, irradiating the precursor fabric with microwave radiation to obtain a TEOS functionalized fabric, wherein a functional group, catalyst, or optical indicator is chemically coupled to the fabric.

14. A garment comprising the modified fabric of claim 13 .

15. A shelter comprising the modified fabric of claim 13 .

16. A filter comprising the modified fabric of claim 13 .

Assignees

• White Brandy J
• Melde Brian
• Us Gov Sec Navy

Inventors

• White Brandy J
• Melde Brian

Classifications

• D06M10/08

  Organic compounds · CPC title

• D06M13/352

  having five-membered heterocyclic rings · CPC title

• D06M10/003 Primary

  Treatment with radio-waves or microwaves · CPC title

• D06M15/643

  containing silicon in the main chain · CPC title

• D06M13/507

  Organic silicon compounds without carbon-silicon bond · CPC title