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AssigneeShanghai Jiao Tong University
InventorsXiaoshi QIAN, Shanyu ZHENG
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A method for modifying the low electric field refrigeration performance of a polyvinylidene fluoride ferroelectric polymer and an application thereof. A polyvinylidene fluoride multi-copolymer solution is reacted with an organic base to obtain a polyvinylidene fluoride ferroelectric polymer which has a reduced dielectric constant modified by double bonds, so that the overall concentration of a polarized region remains unchanged while an electrocaloric effect is improved under a low electric field. In the present invention, double bonds are generated by means of chemically modifying a polyvinylidene fluoride copolymer which contains a chlorine element, and the method has the advantages of a simple process, a short preparation period, mild reaction conditions, low costs, etc. The prepared polymer thin film has good uniformity and compactness, and is able to achieve an electrocaloric effect adiabatic temperature change of more than 5 degrees Celsius under a low electric field of 50 MV/m, and ensure a long life and stable operations, thus meeting requirements of the industrialization of electrocaloric refrigeration materials and the application of related refrigeration systems.
1-10. (canceled)
A method for improving the low-field electrocaloric effect of a polyvinylidene fluoride-based ferroelectric polymer, wherein a polyvinylidene fluoride-based multipolymer solution reacts with an organic base to obtain a double-bond-modified polyvinylidene fluoride-based ferroelectric polymer, thereby achieving the improvement of the electrocaloric effect under a low electric field;
Dependencies are inferred from the claim text.