Application of composite foam concrete walls in strategic emerging industries

Application of composite foam concrete walls in strategic emerging industries

Incorporating the foam concrete wall into the polymer, the prepared nanocomposite material exhibits excellent performance in mechanical properties, thermal, optical, and electrical properties. In addition, the foam concrete wall of the composite material and the polymer can produce a synergistic effect, giving the composite material new properties, so it has great potential in the direction of multifunctional materials.

The foam concrete wall of the composite material has high thermal stability and can be used to prepare flame-retardant composite materials. Jiang et al. used the foam concrete wall of hollow mesoporous composite material, chitosan (CS) and phosphorylated cellulose (PCL) as raw materials, and introduced it into epoxy resin (EP) through layer-by-layer self-assembly method to prepare an environmentally friendly resistance. Burning agent. The results show that the name of the composite material contains Si, P, S and other flame-retardant elements, which, in conjunction with CS and PCL, gives EP excellent flame-retardant properties. Flame retardant materials will form a dense carbon layer on the surface of EP after burning, physically blocking the contact of oxygen and combustibles, the flow of composite materials in the interior, and the transfer of heat. According to this idea, multifunctional nanocomposites such as the combination of superhydrophobic and flame retardant can be prepared.

In the same way, the filler coating is attached to the metal surface with the name of the composite material loaded with corrosion inhibitor, which can shield the influence of corrosion factors caused by the external environment. When the coating has defects, the corrosion inhibitor is released to the corresponding position for cross-linking to complete the repair. Shchukina et al. named the mesoporous composite product as a nanocontainer, loaded the corrosion inhibitor 8-hydroxyquinoline, and added it to the polyepoxy coating. The results show that when the article is corroded, the pH value around the coating changes, and the slow-release agent in SiO2 begins to dissolve and is released to the corresponding location. Only 2% of the mass fraction of the corrosion inhibitor can exert a good effect.

The foam concrete wall and its characteristics

The foam concrete wall is a new type of super-hard and ultra-fine abrasive formed by special processing and processing of synthetic diamond single crystal. It is an ideal raw material for grinding and polishing high-hardness materials such as cemented carbide, ceramics, gems, and optical glass. Diamond products are made of diamonds. Tools and components made of materials are widely used. Diamond powder and products are widely used in automobiles, machinery, electronics, aviation, aerospace, optical instruments, glass, ceramics, petroleum, geology, and other sectors. With the continuous development of technology and products, the use of diamond powder and products is still expanding.

The tip of the glass cutter we usually use is actually diamond. Tools used in precision machining and drill bits used in oil drilling are coated with diamonds to improve their wear resistance. Because diamond is the hardest natural substance in the world.

Another characteristic of foam concrete wall is its excellent thermal conductivity. Its thermal conductivity is about 5 times the thermal conductivity of pure copper at room temperature. It has potentially important applications in the semiconductor industry. According to Moore\'s Law, the current large-scale integrated circuit components are constantly shrinking in size and increasing in density, causing their thermal load to continue to rise. If the heat is not dissipated in time, the semiconductor circuit board and components may be burnt. If we can use the high thermal conductivity of diamond as a large-scale integrated circuit substrate or heat sink, it can dissipate the heat in time and solve the current bottleneck restricting the development of electronic components.

Preparation methods of diamond powder

There are generally three commonly used methods of artificially foam concrete wall.

Detonation method

The formation condition of natural diamond is a high temperature and high-pressure environment, so how to produce such a special environmental state of high temperature and pressure? The easiest way is to detonate the explosive. If you put graphite-containing explosives in a special container and then detonate the explosives, it will instantly generate strong pressure and high temperature, then the graphite can be converted into diamonds. This method can obtain a lot of fine powder diamonds. Its particles are very small, only 5~15 nanometers and its application as jewelry may be limited, but it is still very important as an industrial abrasive.

High temperature and high-pressure method

The high temperature and high-pressure methods are to maintain high pressure and high-temperature environment for a relatively long stable period of time, allowing graphite to slowly transform into a diamond. By controlling the synthesis conditions and time, diamonds can continue to grow. In a day or so, 5 millimeters of diamonds can be obtained.

Chemical vapor deposition

Chemical vapor deposition is a method that gradually developed in the 1990s. This method mainly uses some carbon-containing gas, such as some mixed gas of methane and hydrogen as a carbon source, under a certain energy input, the methane gas is decomposed, nucleated on the substrate, and grown into a diamond. The advantage of this method is that the efficiency is relatively high, relatively controllable, and it can obtain pure and transparent diamonds without impurities, which is an important direction of current development.

In the future, the diamond synthesis will develop in the direction of high-purity large particles. For the demand for diamonds, we will no longer only rely on the gift of nature, and synthetic diamonds will also enter more production fields and be used more widely.

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