looking for a cooling gas that can be trapped between two layers of a plastic.?
594337
Nothing has those properties. The area you describe between the layers is a closed system. If you add heat it will heat up no matter what gas you put in there.\n\nIn practice the best option is to create a vacuum in between the layers, but that was invented 100 years ago and is called a Thermos flask.\n\nThe best gas to place in between the layer is plain water vapour. It has a large heat capacity and will modulate the temperature better than anything else that is harmless, cheap and readily available.
1084004
An electrical discharge would create a void in a small space of air or a vacuum pump designed specifically for that purpose could also serve this purpose.\n\n  A common means of practice for this exercise would be putting the lid loosely on a mason jar and boiling it upright and when it reaches a boiling temperature (carefully) closing the lid.  As the heated particles of gas would expand when the air inside the jar cools it will suck in the little tab on the jar.  This is a result of common usage of vacuum pressure.  A complete void would require super-heating.
254615
You would need to make a distiller of sorts - the sun's rays could evaporate the pure water, and you would just need to capture the water vapor - use a leaf or something similar to direct the vapor into a cup.  \n\nHere's a link on PBS Kids that explains it. Of course, on a deserted Island, you might not have plastic wrap, but you could very well improvise.
1069480
You might be able to contact Akron Coating and Adhesives.  They have announced its new line of hot melt adhesives designed to provide a strong bond between a variety of metals and thermoplastics such as AES’s Santoprene ™. Thermoplastic\nhttp://www.akroncoating.com/products/Detail.aspx?id=28\n\nOr choose from this list of manufacturers, distributors and service companies : http://www.thomasnet.com/products/adhesive-coating-services-392464-1.html
259601
2 tails; one gas and one ice.
280705
Yes such devices exist. I used to have a paintball coach that would fill his tank with his scuba tank.  You can use nitrogen or High Compressed air. Look at my source. Good luck- I know paintball can be expensive (I used to play on a competitive team!).
457474
check thermaltake and tagan\n\nhttp://www.thermaltake.com/\nhttp://www.tagan.com/
451848
Styrofoam will keep your how goodies hot, and also keep cold goodies cold.  The key is that it traps small air pockets and keeps the goods from transferring heat from the inside out. the stuff is really remarkable.  Styrofoam is what people use to handle liquid nitrogen, and it will work right up past the point of boiling water.
1001647
Make a box of strong glass or reinforced cardboard. Put the mobile inside it and use a vacuum cleaner to suck the air out of the box. Make it airtight. Thats it.
775803
With insulation.  Put it between walls or floors.
592659
Single layer films are generally quite permeable to most gases.Barrier films are usually multi-layer films that have been designed to be impervious to gas migration. Some common examples of barrier films will be found in any grocery store. Bags used for packaging potato chips and meat products are gas barrier bags, garbage, freezer, and sandwich bags are not. To understand the difference in practical terms, compare the longevity of a helium-filled balloon made of rubber to a balloon made of foil barrier- the rubber balloon will shrink within hours, but the barrier film balloon will continue to wish you a "happy birthday", or "get well soon" in mid-air for weeks. \n\nConstruction\n\nAlmost all gas barrier films are made of multiple layers. The outer/top layer will be a strong (usually transparent) plastic with a relatively high melting point, often made of polyester (Mylar) or polypropylene. The inner/middle layer will be the gas barrier material (see next). The inside/bottom layer is almost always low density polyethylene, which softens at relatively low temperatures. Additional inner layers are sometimes used to increase the barrier properties of the film, and adhesives may be used to cement the layers. Note that polyester, polypropylene, and polyethyelene are all poor barrier layers on their own.
199484
Wow.  What a fine idea.  If you don't find any you might want to check into how it could be done.  Try googling "absorption refrigeration".  \nFound one.  See ref. below.
847700
i would try to find two sheets of a fine metal mesh. Use the first sheet to charge the incoming air and the second sheet as the negative attracting grid. place them about an inch from eachothers and attach the positive and negative terminals each to a sheet. I would use a car battery as this gives you the most voltage of something that is portable. Whatever source you get make sure it is dc and that each sheet of wire mesh is insulated from the other or else the electrostatic effect wont work. Or if you have ever seen the ionic breeze by sharper image it uses three or four metal plates placed side by side to achieve dust collection. This may work also.
458975
Try Thermo.com/neslab contact them with any questions you have.
330764
Either drop the temperature (remove the enthalpic - heat - energy) or increase the pressure (the less space it has to move freely the closer to solid it becomes) or both
7169
You could make a cloud chamber. It's a chamber that's saturated with alcohol vapor so when a cosmic ray or radioactive particle enters the chamber it leaves a trail of mist like when a plane leaves a vapor trail. It does use dry ice and isopropyl alcohol though. It's kind of complicated but would be worth it in the end. You might even win depending on the competition.
904712
Try this: http://worldwind.arc.nasa.gov/ it's made by Nasa and is hot!!