Such a conclusion has been made by specialists of the Republican State Enterprise “National Center for Mineral Raw Materials Complex Recycling of Republic of Kazakhstan” with participation of their colleagues from the A.V. Topchiev Institute of Petrochemical Synthesis (Russian Academy of Sciences).
Contemporary production of rubber and other plastic materials uses filling agents, which improve properties of the material. Among others, technical carbon or carbon white (hydrated silicon o?ide) are used as filling agents for rubber. Recent years witnessed significant raise of interest to creating composite materials with filling agents made of carbonic and siliceous nanostructures. A rather promising source of raw materials for their receiving is large-tonnage waste of rice production – rice husk, which includes polysacharides, lignine, neutral and tarry matter and silicon dioxide. High-clean silicon dioxide, silicon carbide and silicon are already produced from rice husk. Now, it is time to get a nanostructural silicocarbonous material.
To make a filling agent from rice husk, the raw material is to be carbonized, i.e., the carbon content should be increased in it. When selecting optimal conditions, the researchers exposed rice husk to thermal decomposition in the temperature interval of 450 to 1,000ºC at the heating rate of 15 to 20ºC per minute in the atmosphere of outlet gases, controlling the output and content of obtained solid products. As temperature increases, the silicocarbonous material output decreases, the organic carbon content remains practically constant, and the silicon dioxide content rises. Tests have shown that it is better to process rice husk at the temperature of 650ºC. Under these conditions, nanodimensional particles of amorphous carbon and silicon dioxide are received, which are easily distributed in the caoutchouc matrix and improve rubber compound’s processing characteristics, including durability and plasticity. Tire rubber and general mechanical rubber goods with application of carbonizers from rice husk and its derivatives as a filling agent exceed by quality analogous products manufactured with technical carbon or carbon white. Besides, new silicocarbonous filling agents (due to higher content of hydrocarbon phases) enable to reduce plasticizer consumption or to do without it at all.
The obtained results allow to consider carbonizers from rice husk and its derivatives as promising nanostructural filling agents for elastomers.
Olga Myznikova | alfa
Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University
New findings about the deformed wing virus, a major factor in honey bee colony mortality
11.11.2016 | Veterinärmedizinische Universität Wien
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
17.01.2017 | Earth Sciences
17.01.2017 | Materials Sciences
17.01.2017 | Architecture and Construction