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plant cement

04.01.2020

German scientists, together with colleagues from Nigeria, created cement from plants. For the production of cement, the researchers used the skin of the cassava plant, which is fired under a special temperature regime.

“From the ashes obtained from the burning of plants, we develop a product that is similar in properties to cement. It can be used as a connecting agent instead of classic cement,” says civil engineer Wolfram Schmidt of the Federal Institute for Materials Research and Testing.

Building materials from rice production waste and other vegetable raw materials have also proven themselves well. This is not only one of the options for recycling organic waste, but also a cost savings, since the use of such materials makes cement production cheaper. In addition, such a building material is more durable and lasts longer.

The first cassava concrete building will be built next year. It will be part of the campus of the University of Lagos (Nigeria).

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Nanostructure based on the moth's eye 07.08.2020

Scientists from the Vietnamese Tan Trao University and the Tai Nguyen Pedagogical University made an interesting discovery. It turns out that there are nanoscale bulges in front of the eyes of moths, the study of which promises many interesting technological advances. These bulges have incredible anti-reflective properties that allow the eye to absorb almost all of the incoming light.

Such a nanostructure will enable the development of a host of devices, from efficient solar cells to advanced X-ray emitters and smartphone displays that reduce glare. However, in addition to the pronounced optical properties, the newly discovered structure has another unique property.

Scientists have managed to build a complex nanostructure out of quartz, modeled on the eyes of a moth. The resulting transparent structure was covered with paraffin in order to isolate it from the influence of cold and humid environment. Then we conducted a series of experiments, observing the operation of the nanostructure.

The unique properties of the material are explained by the presence of many air pockets inside the nanostructure. These pockets are filled with a layer of paraffin on the surface, creating higher freezing temperatures and therefore increasing the freezing time of water droplets on the surface.

One of the main applications of open unique materials is the processing of aircraft wings. As is known, the build-up of ice on the surface of an aircraft wing significantly limits the lifting force of an air liner, and also interferes with the moving parts of the aircraft.

The technology can also find application in power transmission systems. Vietnamese experts have also determined that the discovered unique nanostructure is ideal for optical applications such as eyeglasses. This is obvious given the high transparency and anti-reflective properties.

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