Homogenous phase cation exchange membrane and preparation method thereof

A cation exchange membrane and film-forming technology, applied in the field of homogeneous cation exchange membrane and its preparation, can solve the problems of poor oxidation resistance, high fuel permeability, high price, etc., and achieve good thermal stability and chemical stability. , The steps are simple, the effect of reducing the harm to the human body and the environment

Active Publication Date: 2017-08-01
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the most widely used cation exchange membrane is the perfluorosulfonic acid membrane (Nafion) produced by DuPont, but the di

Method used

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  • Homogenous phase cation exchange membrane and preparation method thereof
  • Homogenous phase cation exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0051] Example 1

[0052] (1) Clean the base film (polyethylene film) and place it in a vacuum drying oven to dry to a constant weight, then put the base film into an irradiation bottle, and put it in a cobalt source irradiation chamber to irradiate to a total dose of 30kGy .

[0053] (2) Place the irradiated membrane in a reactor, soak the membrane in a 30% styrene toluene solution, and pass nitrogen gas to remove the air in the reactor, then seal it, and put the reactor at a constant temperature of 60°C React for 2h in a water bath to graft the membrane with styrene monomer. After the reaction, the residual monomer solution and homopolymer in the membrane are removed, and dried for later use.

[0054] (3) Put the grafted membrane into the reactor again, and react with the sulfonating reagent (2% chlorosulfonic acid in dichloromethane), the reaction temperature is room temperature, and the reaction time is 1 h. Subsequently, put the membrane into a 0.1 mol / L sodium hydroxide aque...

Example Embodiment

[0058] Example 2

[0059] (1) Clean the base film (polyethylene film) and place it in a vacuum drying oven to dry to a constant weight, then put the base film into an irradiation bottle, and place it in a cobalt source irradiation chamber to irradiate to a total dose of 50kGy .

[0060] (2) Place the irradiated membrane in the reactor, soak the membrane in a 30% styrene toluene solution, and pass nitrogen gas to remove the air in the reactor, then seal it, and place the reactor at a constant temperature of 80°C React in a water bath for 1 hour to graft the membrane with styrene monomer. After the reaction, the residual monomer solution and homopolymer in the membrane are removed, and dried for later use.

[0061] (3) Put the grafted membrane into the reactor again, and react with the sulfonating reagent (2% chlorosulfonic acid in dichloromethane), the reaction temperature is room temperature, and the reaction time is 4h. Subsequently, the membrane was put into a 0.1mol / L sodium hy...

Example Embodiment

[0065] Example 3

[0066] (1) Clean the base film (polyvinylidene fluoride film) and place it in a vacuum drying oven to dry to a constant weight, then put the base film in an irradiation bottle, and place it in a cobalt source irradiation chamber to irradiate to the total dose It is 70kGy.

[0067] (2) Place the irradiated membrane in the reactor, soak the membrane in a 30% styrene toluene solution, and pass nitrogen gas to remove the air in the reactor, then seal it, and place the reactor at a constant temperature of 70°C React for 1.5h in a water bath to graft the membrane with styrene monomer. After the reaction, the residual monomer solution and homopolymer in the membrane are removed, and dried for later use.

[0068] (3) Use the grafted membrane to sandwich the unirradiated polyvinylidene fluoride film, and attach nylon mesh to the top and bottom of the membrane, and put it between the two stainless steel plates of the tablet press. Finally, it is sent to the press, and aft...

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Abstract

The invention provides a homogenous phase cation exchange membrane and a preparation method thereof and relates to functional macromolecular membrane materials. The preparation method comprises the following steps: taking a macromolecular thin film sensitive to high-energy ray as a substrate film; after washing and radiating through high-energy rays, grafting a monomer styrene or an alkyl styrene monomer to two sides of the substrate film and carrying out functionalization on the monomer styrene and the alkyl styrene monomer; introducing cation exchange groups on two side faces of the membrane; pelleting again or adopting a method of carrying out co-fusion on a macromolecular thin film which is not radiated to obtain the homogenous phase cation exchange membrane. The homogenous phase cation exchange membrane prepared by the preparation method has the characteristics of high exchange capacity, good electrochemical performances, high flexibility and relatively high strength and the like, and has a wide application prospect in national economy branches including food industry, electronic industry, semiconductor industry, medicine industry, dyeing and printing industry, chemical industry and the like; the cation exchange membrane has an excellent alcohol resisting performance and the problem that methanol leaks from an anode film in a utilization process of a direct methanol fuel cell is solved.

Description

technical field [0001] The invention relates to a functional polymer membrane material, in particular to a homogeneous cation exchange membrane and a preparation method thereof. Background technique [0002] Ion-exchange membrane, as a kind of polymer material that can selectively pass ions, has received a lot of attention in recent years due to its advantages of environmental protection, no pollution, high efficiency and energy saving, and easy formation of modules in the process of preparation and application. In the past few decades, ion exchange membrane technology has been widely used in electrodialysis, diffusion dialysis, chlor-alkali industry and fuel cells and other fields. However, the development of ion-exchange membranes is greatly limited due to the problems of high price, poor tolerance, and serious membrane fouling. Therefore, the development of a membrane with good chemical stability, low price, low swelling and high ion exchange capacity is of great signifi...

Claims

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Application Information

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IPC IPC(8): B01D71/78B01D69/02B01D67/00C08J5/22C08J7/16
CPCB01D67/0006B01D69/02B01D71/78B01D2325/42C08J5/2243C08J7/16C08J2323/06C08J2323/12C08J2327/16
Inventor 赵金保张斯泽王静
Owner XIAMEN UNIV
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