Paraffin wax is a colorless to white translucent lump. Pure paraffin is white, while paraffin containing impurities is yellow. It is tasteless, odorless, and greasy. Soluble in ether, chloroform, benzene, petroleum ether, volatile oil or various fatty oils, slightly soluble in ethanol. It has stable chemical properties and does not react with acids, alkalis, oxidants and reducing agents. It will turn yellow under ultraviolet irradiation, can burn and decompose, and is stable at room temperature.
The melting point of paraffin wax:
Paraffin wax is a mixture of hydrocarbons, so it does not have a strict melting point like a pure compound. The so-called melting point of paraffin refers to the temperature at which a stagnation period first appears on the cooling curve when the paraffin sample is cooled and melted under specified conditions. Various wax products require paraffin wax to have good temperature resistance, that is, it will not melt or soften and deform at a specific temperature. Commercial paraffin wax is required to have a series of different melting points depending on the conditions of use, the region and season of use, and the use environment. The main factor affecting the melting point of paraffin is the weight of the raw material fraction selected. The paraffin wax extracted from the heavier fraction has a higher melting point. In addition, the oil content also has a great influence on the melting point of paraffin wax. The more oil contained in paraffin wax, the lower its melting point.
Paraffin wax is widely used in high-tech fields such as aerospace and microelectronics:
As a latent heat energy storage material, paraffin wax has large latent heat of phase change. The solid-liquid phase change process has the advantages of small volume change, good thermal stability, no supercooling phenomenon, and low price. Moreover, the development of aviation, aerospace, microelectronics and optoelectronics technology often requires a large amount of power consumption generated when working with high-power components. Heat dissipation can only be dissipated within a limited heat dissipation area and in a very short time. Phase change materials with low melting points can reach the melting point faster than phase change materials with high melting points, making full use of latent heat to achieve temperature control, and the thermal response time is relatively short.
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