Web of copper for superior heat conductivity


26/03/2012

U.S. researchers recently reported that the web is among three of the best heat conducting materials. Experts at the University of Iowa conducted several studies to determine the ability to transfer heat to the web, using the eight spider silk spider species Nephila clavipes.

As a result, the heat index was equal to 416 web W / (m * Kelvin). This indicates that the so-called carcass filament web may provide heat transfer to a greater extent than copper (353-401 W / (m * K)) and, as tests have shown, similar to silver (406-430 W / (m * K)). Consequently, the web is much greater than the thermal conductivity and the threads of the silkworm, about 800 times better than all the other organic materials.

"This finding was a surprise to us, like a spider web was the most thermally conductive material of the organic type.’s Ability to transfer heat it can surpass the only silver and diamonds" - said the head of research Sinvey Wang (Xinwei Wang), the University of Iowa.

Silk spider web has a wonderfully flexible but sturdy structure. It is almost 15 times thinner than a human hair, and it is only the thickness of 4 micrometers. Filament web is a protein rich substances such as glycine, alanine and serine, which are contained within the nanocrystals.

Friability web imaginary since in fact it is comparable in strength to steel (for its weight), although it has a high degree of elasticity. These unique properties of natural materials offer great opportunities for the application of artificial cobwebs in various sectors of biotechnology.

In addition, U.S. researchers have determined that the thermal conductivity of the web increases in direct proportion to stretch its threads. For example, the stretched yarn at 20% of the normal length, the web will correspondingly increase the thermal conductivity by 20%.

According to scientists, the new information can be used in various fields of science. Based on the web will become possible to create a new heat-removing elements for electronics or even special medical bandage that prevent overheating.

It is worth noting that the spiders species Nephila clavipes, which is also called the "Golden Orb weaving", often the subject of much research biologists. Recently, scientists have been able to make the strings for violins from the web to create a special audio tone while playing the instrument.


Approved by the next-generation video format H.265, twice as efficiently compresses video
Physicists have seen the shadow of the atom
Google is investing $ 200 million in wind power
Exceeding the speed of light was a mistake due to a faulty cable?
Riot police will change clothes in costumes of Spider-Man