Super absorbent proton exchange membrane and preparation method thereof

A technology of proton exchange membrane and high water absorption, which is applied in the direction of climate sustainability, final product manufacturing, sustainable manufacturing/processing, etc. It can solve the problem of limited water absorption capacity of proton exchange membrane, and the hollow part cannot be used to absorb and store water, etc. problem, to achieve low swelling rate, increase water absorption, and solve the effect of high swelling rate

Inactive Publication Date: 2013-12-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] From the reported literature on proton-type polymer electrolyte / SiO 2 The preparation method of the composite membrane is found: the literature has reported that the proton exchange membrane is doped with solid silica particles, but the addition of solid silica spheres has a very limited effect on improving the water absorption capacity of the proton exchange membrane, and the undoped Compared with proton exchange membranes, the water absorption rate can generally only be increased by 5-15%; very few literatures have reported the use of hollow silica microspheres for intercalation of proton exchange membranes (Hongting Pu et al., Journal of Membrane Science415-416 (2012) 496–503), although the reported work used hollow silica microspheres for doping, but what they used was that the wall part of the microsphere had no pores for water to enter and exit, and the hollow part could not be used to absorb and store water, so Functions similar to solid silica spheres

Method used

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  • Super absorbent proton exchange membrane and preparation method thereof
  • Super absorbent proton exchange membrane and preparation method thereof

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Embodiment 1

[0038]This embodiment relates to a highly water-absorbing proton exchange membrane, the hollow mesoporous silica microspheres (the average outer diameter of the hollow mesoporous silica microspheres is 100-2000 nm, and the average wall thickness is 0.1-2000 nm of the outer diameter. 0.4 times, the spherical wall part has an ordered mesoporous structure along the direction perpendicular to the spherical surface) and the mass ratio of sulfonated polyether ether ketone is 1:100; the average pore diameter of the mesopores is 2-10nm, and the mesopores run through the entire hollow The walls of the mesoporous silica microspheres allow absorbed water to enter the cavity of the microspheres.

[0039] This embodiment also relates to the preparation method of the aforementioned superabsorbent proton exchange membrane, the method comprising the following steps:

[0040] The first step: dissolving sulfonated polyetheretherketone in dimethylformamide to prepare a polymer solution with a co...

Embodiment 2

[0045] This embodiment relates to a highly water-absorbing proton exchange membrane, the hollow mesoporous silica microspheres (the average outer diameter of the hollow mesoporous silica microspheres is 100-2000 nm, and the average wall thickness is 0.1-2000 nm of the outer diameter. 0.4 times, the spherical wall part has an ordered mesoporous structure along the direction perpendicular to the spherical surface) and the mass ratio of sulfonated polyethersulfone is 1:100; the average pore diameter of the mesopores is 2-10nm, and the mesopores run through the entire hollow medium The porous silica microsphere wall allows the absorbed water to enter the cavity part of the microsphere.

[0046] This embodiment also relates to the preparation method of the aforementioned superabsorbent proton exchange membrane, the method comprising the following steps:

[0047] The first step: dissolving sulfonated polyethersulfone in dimethylacetamide to prepare a polymer solution with a concentr...

Embodiment 3

[0052] This embodiment relates to a highly water-absorbing proton exchange membrane, the hollow mesoporous silica microspheres (the average outer diameter of the hollow mesoporous silica microspheres is 100-2000 nm, and the average wall thickness is 0.1-2000 nm of the outer diameter. 0.4 times, the spherical wall part has an ordered mesoporous structure along the direction perpendicular to the spherical surface) and the mass ratio of sulfonated polyether ether ketone is 1:50; the average pore diameter of the mesopores is 2-10nm, and the mesopores run through the entire hollow The walls of the mesoporous silica microspheres allow absorbed water to enter the cavity of the microspheres.

[0053] This embodiment also relates to the preparation method of the aforementioned superabsorbent proton exchange membrane, the method comprising the following steps:

[0054] The first step: dissolving sulfonated polyetheretherketone in dimethylformamide to prepare a polymer solution with a co...

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Abstract

The invention discloses a super absorbent proton exchange membrane and a preparation method thereof. The super absorbent proton exchange membrane comprises a proton type polymer electrolyte and hollow meso-porous silica microspheres dispersed in the proton type polymer electrolyte matrix. The invention also relates to the preparation method of the super absorbent proton exchange membrane comprises the following steps: 1, dissolving the proton type polymer electrolyte in a solvent to prepare a polymer solution; 2, adding the hollow meso-porous silica microspheres into the polymer solution, and stirring for dispersion to obtain a mixed solution; and 3, casting the mixed solution on a flat substrate, and drying to obtain the membrane. The hollow meso-porous silica microspheres are used as an additive, and a cavity volume is introduced to the proton type polymer electrolyte to improve the water absorption performance; the proton exchange membrane has the characteristics of high water absorption performance and low swelling rate; and a technical problem of high swelling rate caused by the high water absorption of the proton exchange membrane is solved.

Description

technical field [0001] The invention belongs to a proton exchange membrane and a preparation method thereof, in particular to a highly water-absorbing proton exchange membrane and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has become an ideal energy source for electric vehicles, submarines and various mobile devices due to its characteristics of high specific power, high energy conversion efficiency, low temperature start-up, no corrosion, zero pollution, and environmental friendliness . As one of the important components of PEMFC, the proton exchange membrane plays a key role in its performance. [0003] At present, the most widely used proton exchange membrane at home and abroad is a copolymer composed of tetrafluoroethylene monomer and perfluorovinyl ether monomer with sulfonic acid group. For example, the Nafion membrane of Dupont Company is characterized by the excellent thermal stability and chemical stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/12H01M8/00
CPCY02E60/50Y02P70/50
Inventor 蒋峰景章俊良
Owner SHANGHAI JIAO TONG UNIV
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