Phase change heat storage rubber, preparation method and application thereof

Abstract

Phase change heat storage rubber comprises the following components in parts by weight: 20-70 parts of rubber and 10-68 parts of modified phase change powder. The phase change heat storage rubber contains a proper amount of the modified phase change powder, so that the phase change heat storage rubber has excellent heat absorption and heat storage performance, the phase change enthalpy reaches 15-200 J / g, the specific heat capacity exceeds 2.0 J / g.K, the requirements of batteries and capacitors on heat absorption and heat storage performance are met, the modified phase change powder has a heat absorption and energy storage function, and due to large phase change enthalpy value and slow temperature rise, rubber can absorb more heat. The phase change powder is modified by a modifier. The modifier is large specific surface area powder containing micropores. After mixing with the modifier, the specific surface area is increased. The powder contains a large number of micropores. The phase change powder enters the micropores and is firmly locked, so that the phase change powder cannot be freed from the micropores under high temperature conditions. The stability and sustainability of heat storage of the phase change heat storage rubber are 4-5 times that of similar products on the market. Even if the phase change powder is used for a long time, the heat storage performance of the phase change heat storage rubber is reduced by no more than 2-3%.

Description

technical field [0001] The invention relates to the technical field of heat storage rubber and a preparation method thereof, in particular to a phase change heat storage rubber, a preparation method and an application thereof. Background technique [0002] With the miniaturization and light weight of electronic products, it is required to greatly increase the integration level. The higher the integration level, the more serious the heat dissipation problem. Therefore, in order to prevent heat from accumulating and forming hot spots, it is necessary to quickly transfer or store the heat of the hot spots. Since the internal space becomes smaller and smaller after the product is miniaturized, a rubber shell that transfers heat with heat-conducting materials is usually used, while the current rubber shell Without the heat storage function, it will soon reach heat saturation, and cannot realize the continuous transfer and storage of heat; [0003] For example, a large-capacity l...

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Problems solved by technology

[0004] Similarly, capacitors tend to generate a large amount of electricity when they work for a long time. The more capacitors, the more intense the heat. How to conduct the heat energy to the rubber shell as soon as possible is also a problem that needs to be solved urgently in the industry.

[0005] In order to solve the above problems, phase change materials are added to the rubber in the prior art. However, the phase change materials will leak at high temperatures, and the phase change materials will be freed from the matrix. On the one hand, it will lead to subsequent mixing and stirring. The difficulty increases. On the other hand, after the phase change material is released, the performance of the phase change heat storage rubber will be greatly reduced, affecting its heat storage performance.

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