Energy-accumulating temp-controlled thermoplastic cross-link high-molecular composite material with solid-solid phase change and its preparing process

Abstract

The present invention features that the material has crosslinked crystalline polyolefin as base body and crystalline alkyl hydrocarbon dispersed inside the crosslinked net as the composite material for phase change energy accumulation. In the composite material, the phase change energy accumulating component accounting for 40-80 % has solid-solid phase conversion at phase change temperature of 20-80 deg.c and phase change enthalpy greater than 80 J / g. The composite phase change material has relatively high energy accumulating density and excellent heat stability, may be used as energy accumulating material for the accumulation of solar energy and industrial afterheat, constant temperature in building and energy saving in air conditioner and as temperature control material in electronic instrument, machinery, etc. widely.

Description

technical field

[0001] The invention relates to the technical field of phase change energy storage materials, in particular to a preparation method of a cross-linked polymer solid-solid phase change energy storage temperature control composite material. Background technique

[0002] Phase change energy storage materials can store and release energy at a constant temperature by utilizing their characteristics of absorbing or releasing a large amount of heat during the reversible phase change process. Compared with the sensible heat storage method, the use of phase change energy storage has the advantages of high energy storage density, high thermal efficiency, and constant temperature in the process of absorbing and releasing heat, so this kind of functional materials can be widely used in various fields of military and civilian use , including: (1) solar energy storage; (2) utilization of industrial waste heat; (2) energy storage during low-load periods of electricity; (...

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