Researchers extracted from rice husk nano-silica

Rice husk is the traditional understanding of "agricultural waste", into a rice paddy, rice hulls are often burned or buried. Recently, however, researchers have to waste Bao, from the success of the "agricultural waste" extracted out of the manufacture of rubber and plastic indispensable nanometer silicon dioxide.

According to the inventor of the technology, Jilin Institute of Chemistry, University Professor Wang Zichen, rice husk as a result of the ingredients in a large amount of silicon, so even if they are buried away in the soil degradation was also difficult to easily give rise to changes in the composition of the land.

After years of research, Prince Lichen in the use of rice husk of the characteristics of silicon-rich, out through the inorganic substances, fibers and remove impurities, as well as combustion of carbon components, etc., extracted from rice husk in a silicon dioxide, which accounts for about content of rice husk About one-fifth. This process does not produce waste, all were to make full use of rice husk, and in addition to carbon, through a certain procedure will also retain carbon, activated carbon into the raw materials.

It is understood that the processing of ore out of silicon dioxide is a multi-micron silicon dioxide, and the processing of rice husk is a nano-silica, molecular size micron is one per cent, so its strength and transparency than Micron silicon dioxide better, but it costs a lot less. At present, the technology is being used to prepare large-scale production.

Silica is an essential ingredient of plastics and rubber additives, which can increase the strength of plastic materials and transparency. Silica in the past mostly rely on the extraction of minerals, ores, but the composition of complex, requiring multi-channel process to remove impurities in order to extract the necessary ingredients. In addition, after the extraction of ore residue can not be a better recovery, pose a threat to the environment.