Hi-Tech Super Material Made Out Of Rice Husks

A Malaysian scientist has discovered a revolutionary method of producing aerogel using waste rice husks. Known for it’s ghostlike appearance, aerogel has many possible applications including insulation and as a shock absorber. The strong, light weight substance (it’s 99% air) is made of silica, which composes 20% of the weight of rice husks. Using husks as the source of silica for Aerogel drastically cuts the cost of production.

Treehugger reports:

Aerogel was invented in 1931. But at $3000 per kilogram, it’s use has been limited to visionary projects and unique structural applications like reinforcement of tennis raquets. But that could change soon. Halimaton Hamdan, a Cambridge-trained professor of chemistry at the Universiti Teknologi Malaysia (Technical University of Malaysia), has announced the discovery of a cheap process for turning waste rice husks into aerogel. Actually into “Maerogel”, as Hamdan has dubbed the “Malaysian aerogel”.

The translucent, smoky material weighs only three times as much as air. It is, in fact, mostly air; air cleverly trapped in a silicon matrix which gives the material insulating properties 37 times better than fiberglass. The image demonstrates the insulating capability as a layer of aerogel prevents a blowtorch from burning the hand below.

Aerogel can also bear mechanical pressure of up to 2000 times its weight. The combination of low weight and strength make aerogel a multifaceted green construction material.

[via Treehugger]