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nasa insulation: from metalized plastics to aerogels or frozen smoke - metalized mylar film

by:Cailong     2019-07-14
nasa insulation: from metalized plastics to aerogels or frozen smoke  -  metalized mylar film
NASA insulation: Early stages protect spacecraft from a large amount of heat generated by friction with the atmosphere during launch and re-launch
Entry is one of the biggest challenges facing scientists and engineers.
Traditional insulation methods have proved to be inadequate, as they result in additional weight of the spacecraft, which is inappropriate.
Initially NASA's insulation technology was spray.
Insulation developed by Marshall Space Flight Center in the 1980 s
It is a mixture of nine chemicals and adhesives and then sprayed on the surface.
However, it has many disadvantages. First of all, its use has a timetable. if it is not applied within five hours after mixing, it becomes unsuitable for use, it is difficult to adjust the strength of the material, and in the end, the two components of it are contaminants.
In 1993, scientists improved the insulting paint of the old version and produced a more efficient paint;
Marshall convergence coating1.
Is a mixture of hollow spherical glass (8%), cork (9%), and epoxy (83%).
Since the mixing occurs at the spray gun release point, the problem of effective working time of materials is overcome in the new technology.
Another revolutionary benefit of this new convergence spray mixture is the evolution of a new insulating paint that can be used to paint houses.
Using NASA's technical assistance, David page of The Tech Trader company produced Insuladd, a powder additive that creates insulation when mixed with regular paint and thus helps
Another NASA insulation with ground applications is a thin and shiny piece of insulation.
All spaceships and space exploration instruments need a solar shield.
This material has high reflective power and is made of solid plastic, aluminum vacuum-
Metal film is plated on the surface.
As the evaporated aluminum is coated on the plastic wire, it has the flexibility of the plastic and the super reflective capacity of the aluminum.
Aluminum coating acts as infrared-
Reflect the surface, thus protecting the object from high temperature.
This extremely lightweight material protects the spacecraft and its instruments from extreme temperature in space.
This aluminum-containing Mylar has many commercial uses.
One of the biggest problems American marathon athletes face is fatigue caused by excessive heat loss at the end of the race.
This new technology has proved convenient as it helps keep them running warm during the cold winter months.
Similarly, in cold areas, it can be used to keep the body warm even if the best winter clothes are not enough.
Another product containing aluminum medlar is an emergency sleeping bag.
They are light in weight and, thanks to their high reflective capacity, keep the body warm in harsh conditions.
They are often distributed to people suffering from natural disasters.
The air gel is a clear smoked blue substance named frozen smoke by Nick.
This extremely light solid was discovered by Samuel Stephens Kistler in 1931 and was originally used for different applications such as insulation materials and thickening agents in some cosmetics.
But NASA later began using it as an insulating material and dust collector.
This is a silicon solid but porous like a sponge.
Interesting 99.
8% of its total volume is air, giving it unique properties such as being able to withstand extremely high temperatures.
Scientists used their thermal insulation to use it as an insulator for batteries in a Mars probe launched in 2003.
However, unlike other NASA insulators, this insulator is not commonly used commercially because of its high cost.
The latest addition to NASA insulation is the low density lightweight ceramic Ablator material (LCA).
It is much lighter than the standard insulator in the spacecraft and can withstand temperatures of up to 5,000 degrees Fahrenheit.
The thin layer of organic polymer resin used with the Foundation fiber layer gives this material special properties such as durability, lightness and heat resistance.
NASA plans to use it as a shield for future missions.
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