Ferroelectric polymer electric card material and preparation method thereof

Abstract

The invention discloses a ferroelectric polymer electric card material and a preparation method thereof, wherein the ferroelectric polymer electric card material is a polyvinylidene fluoride (PVDF) based ferroelectric polymer electric card nanowire array; the PVDF based ferroelectric polymer electric card nanowire array is also embedded into a porous anodic aluminum oxide (AAO) template. Accordingto the preparation method, a PVDF based ferroelectric polymer electric card material is controlled to form the nanowire array; the nanowire array is also embedded into the porous anodic aluminum oxide AAO template; the ferroelectric polymer nanowire array is prepared in the porous anodic aluminum oxide AAO template through a solution infiltration method, and through improving the morphology, structure, internal microscopic joint construction and the like of a key ferroelectric polymer, in comparison with the prior art, the problems that the strength of a ferroelectric polymer electric card islow, the heat conduction in the electric card material is difficult and the refrigeration power density of an electric card device is low and the like are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, and more specifically relates to a ferroelectric polymer electric card material and a preparation method thereof. The prepared electric card material can be used in a new solid-state refrigeration technology, and particularly relates to a ferroelectric polymer electric card nanowire array and its preparation method. Background technique [0002] Refrigeration technology is widely used in industry, military, medical and daily life. At present, the vast majority of refrigeration equipment uses traditional compression refrigeration technology, but this refrigeration method has problems such as low refrigeration efficiency and difficulty in miniaturization of equipment, and the refrigerant used in compression refrigeration has caused serious damage to the environment. People are urgently looking for new refrigeration technology. Way. [0003] Electric card refrigeration is a new type of refri...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the purpose of the present invention is to provide a ferroelectric polymer electric card material and its preparation method, wherein the key ferroelectric polymer morphology, structure, internal microscopic connection structure (especially the corresponding microscopic mechanism of heat conduction), and the overall process design of the corresponding preparation method and the conditions and parameters of each key step are improved. Compared with the existing technology, it can effectively solve the problem of low strength of ferroelectric polymer electric cards To solve the problems of difficult heat conduction in the card material and low cooling power density of the electric card device, the present invention controls the polyvinylidene fluoride-based ferroelectric polymer electric card material to form a nanowire array, and embeds the nanowire array in the In the porous anodized aluminum oxide AAO template, the ferroelectric polymer nanowire array was prepared in the porous anodized aluminum oxide AAO template by the solution infiltration method. On the one hand, the nano-stress confinement effect of the AAO porous template was used to induce the change of the crystallization behavior of the ferroelectric polymer. In order to improve its electric card effect, on the other hand, the AAO tube wall with high thermal conductivity is used as a high-speed heat conduction channel to speed up the heat transfer between the electric card material and the hot and cold ends, and to increase the cooling power density of the electric card material during work, making the ferroelectric Polymer electric card material has strong electric card effect and good thermal conductivity under low electric field, and is a ferroelectric polymer electric card material especially suitable for new solid refrigeration

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