Paraffin wax, also known as crystalline wax, is usually a white, odorless waxy solid. It melts at 47°C-64°C and has a density of about 0.9g/cm3. It is soluble in gasoline, carbon disulfide, xylene, ether, benzene, chloroform, Non-polar solvents such as carbon chloride and naphtha are insoluble in polar solvents such as water and methanol.
Pure paraffin is a good insulator, its resistivity is 1013-1017 ohm·m, which is higher than most materials except some plastics (especially Teflon). Paraffin wax is also a good heat storage material, with a specific heat capacity of 2.14-2.9J·g-1·K-1 and a heat of fusion of 200-220J·g-1.
The main performance indicators of paraffin wax are melting point, oil content and stability.
The main purpose
1. Because of its high oil content, crude paraffin is mainly used to make matches, fiberboards, tarpaulins, etc.
2. After immersing the paper in paraffin wax, various wax papers with good waterproof properties can be prepared, which can be used in food, medicine and other packaging, metal rust prevention and printing industries; after paraffin wax is added to cotton yarn, the textiles can be soft, smooth and smooth. It is elastic; paraffin wax can also be used to make detergents, emulsifiers, dispersants, plasticizers, greases, etc.
3. As a kind of latent heat energy storage material, paraffin wax has the advantages of large latent heat of phase change, small volume change during solid-liquid phase change, good thermal stability, no supercooling phenomenon, and low price. It is used in aviation, aerospace, and microelectronics. Such high-tech systems as well as energy-saving houses have been widely used in various fields.
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