Covered the face mask principle, is to use the short time, temporary isolation outside air and pollution, improve skin temperature, the expansion of the pores of the skin, promote the secretion of sweat gland and metabolism, make the skin of oxygen levels

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The application of nanomaterials and technology in various fields plays a vital role in the development of various fields.Therefore, the continuous improvement of nanomaterials and technology is conducive to the rapid development of various industries and

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At present, in terms of the global use of lubricant additives, the internal combustion engine oil additives account for about 70% of the total amount of industrial use The amount of lubricant additive is about 18% of the total amount. 1. Lubricating o

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From April 15 to 17, the 2019 international building energy conservation and green building technology and equipment expo was held in xi an qujiang international convention and exhibition center. With the theme of promoting the innovation and upgrading of

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Bismuth oxide Bi2O3 is the simplest bismuth bismuth photocatalyst with special electronic structure and excellent photocatalytic performance in visible light response. It is regarded as one of the most promising semiconductor photocatalytic materials.The

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Poly(tetrafluoroethylene)（PTFE） fiber fineness distribution range wide, fiber strength for 1. 37 cn/dtex, melting point at about 327 ℃, limit oxygen index was 95%, the coefficient of friction in 0. 2 of the left and right sides, fiber properties such as w

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At present, nanomaterials play a very important role in the treatment of environmental pollution.This kind of remediation material will produce REDOX reaction and adsorption after direct contact with pollutants, effectively reducing the content and concen

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1. The meaning of quantum dots Quantum dots are high-tech nanocrystals with a diameter of about 2-5 nanometers. When stimulated by strong light or electric current, they will emit different colors of light according to their own diameter. Because quan

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Magnesium diboride superconductors have attracted much attention since they were discovered by Japanese scientists in 2001. MgB2 superconducting wire strip has the operating temperature that traditional low-temperature superconductor cannot reach, and the

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