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Why does silicone dissipate heat?
Source: | Author:prob07b89 | Published time: 2020-02-25 | 819 Views | Share:
In fact, there are many silica gels. Generally speaking, silica gels can be divided into two categories: organic silica gel and inorganic silica gel according to their properties and components. Inorganic silica gel is a highly active adsorption material, which is usually made by reacting sodium silicate and sulfuric acid and undergoing a series of post-treatment processes such as aging and soaking. Silica gel is an amorphous substance, and its chemical molecular formula is mSiO2. nH2O. It is insoluble in water and any solvents, non-toxic and tasteless, and stable in chemical properties. It does not react with any substance except strong alkali and hydrofluoric acid. Various types of silica gel have different microporous structures due to their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many other similar materials that are difficult to replace: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. The basic structural unit of silicone rubber products is composed of silicon-oxygen links, and the side chains are connected to other various organic groups through silicon atoms. Compared with other polymer materials, the most prominent properties of silicone products are: Temperature resistance properties Silicone is not only resistant to high temperatures, but also to low temperatures, and can be used over a wide temperature range. Whether it is chemical or physical mechanical properties, the change with temperature is small. 2. Weather resistance Silicone has better thermal stability and radiation and weather resistance than other polymer materials. The service life of organic silicon in natural environments can reach decades. 3． Electrical insulation performance In addition to excellent heat resistance, silicone also has excellent water repellency, which is a guarantee of high reliability for electrical equipment in wet conditions. 4． Physiologically inert polysiloxanes are one of the least active compounds known. They are very resistant to biological aging, have no rejection reaction with the animal body, and have good anticoagulant properties. Low surface tension and low surface energy Low surface tension and low surface energy are the main reasons for its many applications: hydrophobicity, defoaming, foam stability, anti-sticking, lubrication, glazing and other excellent properties. Organic silicon is mainly divided into three categories: silicone rubber, silicone resin, and silicone oil. Among the many synthetic rubbers, silicone rubber is the best among them. It is odorless and non-toxic, and is not afraid of high temperature and resistance to cold. It is "easy and calm" and "the face does not change color" at three hundred degrees Celsius and ninety degrees below zero. Silicone rubber also has good electrical insulation, oxygen and aging resistance, light and aging resistance, mildew resistance, and chemical stability. Because of these excellent properties, silicone rubber has gained a wide range of important uses in modern medicine. In recent years, hospitals, research institutes, and factories have collaborated to trial-produce a variety of silicone rubber medical supplies. Silicone noise-proof earplugs: comfortable to wear, can block noise well and protect eardrums. Silicone rubber fetal head aspirator: easy to operate and safe to use. It can be deformed according to the size of the fetal head. The fetal scalp will not be sucked up during suction. It can avoid the scalp hematoma and intracranial damage. pain. Silicone rubber artificial blood vessel: It has special physiological functions and can be intimate with the human body. The human body does not reject it. After a certain period of time, it will be completely stable with the human body. Silicone rubber tympanum repair sheet: The sheet is thin and soft, with good finish and toughness. It is an ideal material for repairing eardrums. It is easy to operate and has good results. In addition, there are silicone rubber artificial trachea, artificial lung, artificial bone, silicone rubber duodenal tube, etc., all have very good effects.