Chemochromic detector for sensing gas leakage and process for producing the same

Patent metadata

Field	Value
Publication number	US-8945473-B2
Application number	US-201213615850-A
Country	US
Kind code	B2
Filing date	Sep 14, 2012
Priority date	Nov 6, 2007
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

A chemochromic sensor for detecting a combustible gas, such as hydrogen, includes a chemochromic pigment and a textile polymer. The textile material includes a chemochromic pigment operably responsive to a combustible gas. The combustible gas sensing textile material can be made by melt spinning, solution spinning, or other similar techniques. In a preferred embodiment carbon nanotubes are used with the textile material which will increase the material strength and alter the thermal and/or electrical properties. These textiles woven into fabrics can provide garments not only with hydrogen sensing capabilities but the carbon nanotubes will allow for a range of sensing capabilities to be embedded (i.e. gas, health, and electronic monitors) within the garments.

First claim

We claim:

1. A combustible gas sensing garment comprising
a chemochromic pigment interdispersed within a textile polymer, wherein said chemochromic pigment is combined with aerogel or xerogel, said chemochromic pigment is operably responsive to a combustible gas and said textile polymer is provided in the form of fibers that are woven to provide said garment.

2. The garment of claim 1 , wherein said chemochromic pigment is selected from the group consisting of titanium dioxide, vanadium oxide, tungsten oxide, molybdenum oxide, yttrium oxide, and combinations thereof and at least one compound selected from the group consisting of oxides, hydroxides, hydrated oxides, and combination thereof of platinum group metals deposited thereon.

3. The garment of claim 1 , wherein said polymer is selected from the group consisting of acrylics, acrylonitriles, epoxy, ethylene vinyl alcohol, ethylene-vinyl acetate, fluoroplastics, liquid crystal polymers, polyacetals, polyacrylamides, polyacrylates, polyamide-imide, polyamides, polyanilines, polybutadienes, polybutylenes, polycarbonates, polydienes, polyesters, polyethers, polyethylenes, polyimides, polyketones, polynitriles, polyolefins, polysiloxanes, polystyrenes, polysulfones, polyurethanes, polyvinyl alcohols, polyvinylchlorides, polyvinyls, polyvinylidene, silicones, thermoplastics, thermoset polymers, derivatives and combinations thereof.

4. The garment of claim 1 , wherein said chemochromic pigment is combined with at least one electrostatically dissipative additive.

5. A method of making the garment of claim 1 , comprising fiber spinning said chemochromic pigment with aerogel or xerogel.

6. The method of claim 5 , further comprising fiber spinning said chemochromic pigment with an additive selected from the group consisting of an electrostatically dissipative additive, a salt, a polyelectrolyte, an ionic or non-ionic surfactant, carbon nanotubes, and combinations thereof.

7. The garment of claim 1 ,wherein said chemochromic pigment is combined with carbon nanotubes.

8. The garment of claim 1 , wherein said chemochromic pigment is combined with at least one polyelectrolyte.

9. The garment of claim 1 , wherein said chemochromic pigment is combined with at least one ionic or non-ionic surfactant.

10. The garment of claim 1 , whereby said fibers are formed by melt spinning or solution spinning.

11. The garment of claim 1 , whereby said fibers are formed by a technique selected from electro-spinning, gel spinning, wet spinning, dry spinning and dry-jet wet spinning.

12. The garment of claim 1 , wherein said combustible gas is selected from hydrogen, carbon monoxide, acetylene and methane.

13. The garment of claim 12 , wherein said combustible gas is hydrogen.

14. The garment of claim 12 , wherein said chemochromic pigment is operably responsive to a combustible gas without the necessity of power consumption.

Assignees

• Roberson Luke B
• Captain Janine E
• Williams Martha K
• Tate Lanetra Clayton
• Nasa

Inventors

• Roberson Luke B
• Captain Janine E
• Williams Martha K
• Tate Lanetra Clayton

Classifications

• D01F1/10

  Other agents for modifying properties · CPC title

• Y10T436/214

  Acyclic [e.g., methane, octane, isoparaffin, etc.] · CPC title

• Y10T436/22

  Hydrogen, per se · CPC title

• Y10T436/216

  Unsaturated [e.g., ethylene, diene, etc.] · CPC title

• G01N21/783

  for analysing gases · CPC title