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Preparation method and application of through-hole phase transfer type ipmc with pvdf/pvp/il as base membrane

A base film and phase transfer technology, applied in the direction of coating, etc., can solve the problems of small mechanical properties, short displacement period, and short displacement distance, and achieve the effects of weight reduction, low energy consumption, and light weight

Active Publication Date: 2020-03-10
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] IPMC made of Nafion has the characteristics of low voltage and fast response, and is widely used in various fields of science and technology. However, it also has disadvantages such as low porosity, poor water absorption, short displacement distance, short displacement period, and small mechanical properties.

Method used

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  • Preparation method and application of through-hole phase transfer type ipmc with pvdf/pvp/il as base membrane
  • Preparation method and application of through-hole phase transfer type ipmc with pvdf/pvp/il as base membrane
  • Preparation method and application of through-hole phase transfer type ipmc with pvdf/pvp/il as base membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 (casting method prepares basement membrane)

[0046] Prepare the basement membrane of IPMC by casting method: weigh 2.196g PVDF solution, 0.3876gPVP and 20mlDMF solvent in a beaker, add 1ml1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid, mix and stir evenly, and The mixed film solution is pumped with low pressure to bubble, and then the solution with pumped bubbles is placed in the air for one minute to obtain a film solution, and then the film solution is spread on a glass slide to be flattened, and dried in an oven at 70°C for 6 hours , to prepare PVDF / PVP / IL basement membrane.

Embodiment 2

[0047] Embodiment 2 (preparation of basement membrane by phase transfer mode)

[0048] Prepare PVDF / PVP / IL basement membrane by phase transfer method: weigh 2.196g PVDF powder (14% of solution quality), 0.3876g PVP powder (15% of PVDF powder content) and 20mlDMF solvent in a beaker, then add 1ml ionic liquid , mechanically stirred at 60°C for 10 hours, after mixing evenly, remove the air bubbles from the mixed membrane solution in vacuum, then put the solution with bubbles in the air and let it stand for one minute to obtain a transparent and uniform casting solution. The PVDF / PVP / IL casting solution is quantitatively dropped on the glass plate, and then spread evenly on the glass plate on the glue homogenizer to obtain a film solution with uniform thickness, and then stay in the air for 30s, then put it in 20% ethanol In the coagulation solution, the phase inversion process is completed to precipitate and form a film, and the thickness of the obtained film is about 100-800 mi...

Embodiment 3

[0049] Embodiment 3 (preparation through-hole casting type IPMC base film)

[0050] Choose the sodium chlorate solution that secondary concentration is 5000ppm to remove the pore-forming agent PVP in the PVDF / PVP / IL casting film, the PVDF / PVP / IL casting film that example 1 obtains is made into 2x2cm shape, it is put into the prepared The concentration is 5000ppm sodium hypochloride solution, heated at 50°C, soaked for 3 days, then rinsed with ionized water three times after taking it out, soaked in deionized water for 6 hours, and dried in an oven at 70°C. The through-hole IPMC base film with high-performance actuation type we need is made.

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Abstract

The invention discloses a preparation method and applications of through-hole phase-transfer type IPMC taking PVDF / PVP / IL as a basal membrane. The IPMC is composed of a basal membrane, carbon nanotubemembrane electrodes fixed on two sides of the basal membrane, and an external electric signal input system. The through-hole phase-transfer type IPMC has high porosity. The PVDF / PVP / IL basal membraneis prepared by a phase transfer technology and a hypochloric acid PVP removing technology; the porosity of the basal membrane is large therefore, IPMC can absorb more ionic liquid, the IPMC can be stably driven for a long term; the through-hole phase-transfer type IPMC is hydrophobic, and the driving of IPMC obtained through IL (ionic liquid) driving is more stable. The through-hole phase-transfer type IPMC contains a large amount of channels, the ionic migration amount in IPMC is increased, greater pressure difference and ionic flows are formed in IPMC, greater driving is formed in an electric actuator, and at the same time, a stronger mechanical performance is provided.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and specifically relates to a preparation method and application of a high-performance through-hole phase-transition IPMC with PVDF / PVP / IL as a base film. Background technique [0002] Perfluorosulfonic acid products are mainly composed of fluorocarbon main chain and sulfonate side chain, and its chemical structure is as follows: [0003] [0004] The structure of its fluorocarbon main chain is similar to the chemical structure of polytetrafluoroethylene, which has hydrophobic properties, while perfluorosulfonic acid has hydrophilic properties due to the hydrophilicity of the sulfonate functional groups in its side chains. At present, DuPont of the United States mainly produces perfluorosulfonic acid products, including Nafion membrane and Nafion solution series products. [0005] On both sides of the Nafion membrane, precious metals such as platinum, gold, etc. are plated by elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08L39/06C08J9/26C08J9/28C08J5/18C08J9/36
CPCC08J5/18C08J9/26C08J9/28C08J9/36C08J2201/0464C08J2201/0542C08J2327/16C08J2439/06
Inventor 郭东杰王培远韩宇兵拓万涛丁井鲜弋皓月
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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