Title:
METHOD FOR MODIFYING LOW ELECTRIC FIELD REFRIGERATION PERFORMANCE OF POLYVINYLIDENE FLUORIDE FERROELECTRIC POLYMER AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/257747
Kind Code:
A1
Abstract:
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.
Inventors:
QIAN XIAOSHI (CN)
ZHENG SHANYU (CN)
ZHENG SHANYU (CN)
Application Number:
PCT/CN2022/094541
Publication Date:
December 15, 2022
Filing Date:
May 23, 2022
Export Citation:
Assignee:
UNIV SHANGHAI JIAOTONG (CN)
International Classes:
C08F214/22; C08F8/26; H01L41/193
Domestic Patent References:
| WO2019075061A1 | 2019-04-18 |
Foreign References:
| CN113214424A | 2021-08-06 | |||
| CN111094368A | 2020-05-01 | |||
| CN103387682A | 2013-11-13 |
Other References:
LE GOUPIL FLORIAN, KALLITSIS KONSTANTINOS, TENCÉ‐GIRAULT SYLVIE, POURIAMANESH NASER, BROCHON CYRIL, CLOUTET ERIC, SOULESTIN THIBAU: "Enhanced Electrocaloric Response of Vinylidene Fluoride–Based Polymers via One‐Step Molecular Engineering", ADVANCED FUNCTIONAL MATERIALS, WILEY - V C H VERLAG GMBH & CO. KGAA, DE, vol. 31, no. 1, 1 January 2021 (2021-01-01), DE , pages 2007043 - 2007043-9, XP093013582, ISSN: 1616-301X, DOI: 10.1002/adfm.202007043
ZHANG ZHICHENG, WANG XIAO, TAN SHAOBO, WANG QING: "Superior electrostrictive strain achieved under low electric fields in relaxor ferroelectric polymers", JOURNAL OF MATERIALS CHEMISTRY A, ROYAL SOCIETY OF CHEMISTRY, GB, vol. 7, no. 10, 5 March 2019 (2019-03-05), GB , pages 5201 - 5208, XP093013583, ISSN: 2050-7488, DOI: 10.1039/C8TA11938D
BAI DEPENG, SHAOBO TAN;ZHICHENG ZHANG: "Synthesis of Fluoropolymer Containing Tunable Unsaturation", GAOFENZI-CAILIAO-KEXUE-YU-GONGCHENG = POLYMER MATERIALS SCIENCE AND ENGINEERING, CHENGDU KEJI DAXUE GAOFENZI YANJIUSUO, CN, vol. 29, no. 9, 31 December 2013 (2013-12-31), CN , pages 15 - 18, XP093013587, ISSN: 1000-7555, DOI: 10.16865/j.cnki.1000-7555.2013.09.004
ZHANG ZHICHENG, WANG XIAO, TAN SHAOBO, WANG QING: "Superior electrostrictive strain achieved under low electric fields in relaxor ferroelectric polymers", JOURNAL OF MATERIALS CHEMISTRY A, ROYAL SOCIETY OF CHEMISTRY, GB, vol. 7, no. 10, 5 March 2019 (2019-03-05), GB , pages 5201 - 5208, XP093013583, ISSN: 2050-7488, DOI: 10.1039/C8TA11938D
BAI DEPENG, SHAOBO TAN;ZHICHENG ZHANG: "Synthesis of Fluoropolymer Containing Tunable Unsaturation", GAOFENZI-CAILIAO-KEXUE-YU-GONGCHENG = POLYMER MATERIALS SCIENCE AND ENGINEERING, CHENGDU KEJI DAXUE GAOFENZI YANJIUSUO, CN, vol. 29, no. 9, 31 December 2013 (2013-12-31), CN , pages 15 - 18, XP093013587, ISSN: 1000-7555, DOI: 10.16865/j.cnki.1000-7555.2013.09.004
Attorney, Agent or Firm:
SHANGHAI JIAODA PATENT AGENCY (CN)
Download PDF:
Previous Patent: LITHIUM-ION BATTERY
Next Patent: VIRTUAL MEMORY MANAGEMENT METHOD AND ELECTRONIC DEVICE
Next Patent: VIRTUAL MEMORY MANAGEMENT METHOD AND ELECTRONIC DEVICE