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Recovery and recasting technology of Nafion film in IPMC (Ionic Polymer Metal Composite)

A recasting and process technology, which is applied to the recovery and recasting process of Nafion membrane in IPMC materials, can solve the problems of low concentration of Nafion solution, unsuitable for IPMC field, harsh conditions, etc., and achieve low prices of equipment, medicines and equipment. , Excellent driving performance and strong repeatability

Inactive Publication Date: 2013-01-16
XI AN JIAOTONG UNIV
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Problems solved by technology

Electrochemistry, 1006_3471 (2001) 03_0367_0) studied its dissolution process, and proposed a patent (CN 1884352A) in this field, however, the process is relatively complicated, the required conditions are harsh, and the Nafion solution concentration obtained is relatively high Low, not suitable for IPMC field

Method used

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  • Recovery and recasting technology of Nafion film in IPMC (Ionic Polymer Metal Composite)
  • Recovery and recasting technology of Nafion film in IPMC (Ionic Polymer Metal Composite)

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Embodiment Construction

[0025] 1) IPMC waste purification pretreatment

[0026] Firstly, waste IPMC materials go through a series of pretreatment procedures to remove inorganic impurities and organic impurities, which includes cutting IPMC waste into a suitable size (usually 1X1cm 2 Size, too large or too small is not easy to follow-up operation), so that its contact with the treatment liquid becomes more uniform. Put the IPMC waste cut into pieces into a strong acid solution and boil for 30 minutes. The strong acid can be sulfuric acid and hydrochloric acid. If hydrochloric acid is used, the concentration is 0.2mol / L. During the boiling and washing process, the container containing the IPMC waste should be sealed to prevent HCI from volatilizing into the air during the boiling and washing process. After taking it out, rinse it with deionized water for 2-3 times, and then boil it in 3% hydrogen peroxide for 30 minutes. This is because the electrodes and other air-contacting parts on the surface of t...

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Abstract

The invention discloses a recovery and recasting technology of a Nafion film in an IPMC (Ionic Polymer Metal Composite). The recovery and recasting technology is characterized by comprising the steps as follows: 1) pre-processing the waste IPMC material; 2) recovering the Nafion film; 3) dissolving the recovered film; and 4) casting the Nafion solution. The recovery and recasting technology disclosed by the invention is simple in technical step and operation process, and low in cost of used equipment and medicines, therefore the cost of the obtained high-concentration Nafion solution is low, the obtained casting film has high performance, and the prepared IPMC material has high driving performance and high practicability.

Description

technical field [0001] The invention relates to a recovery and recasting process of Nafion membrane (proton exchange membrane) based on ionic polymer-metal composite material (IPMC), in particular to using aqua regia to dissolve and treat discarded IPMC material electrodes to obtain a reusable Nafion membrane , after impurity removal and purification, the Nafion solution is obtained by high-temperature dissolution, and then the resulting solution is re-prepared into different shapes of Nafion membranes / body by thermoplastic molding. Background technique [0002] Ionic polymer-metal composite (IPMC) is a new type of intelligent material with sensing-actuating bidirectional electromechanical conversion function. Large bending deformation can be used to make micro-miniature drivers, and has a wide range of application fields. [0003] As a sandwich structure composite material, IPMC is mainly composed of upper and lower layers of precious metals and a core layer of ionic membr...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08J11/06C08J11/08C08J5/18
CPCY02W30/62
Inventor 陈花玲王延杰王永泉朱子才罗斌常龙飞
Owner XI AN JIAOTONG UNIV
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