A kind of preparation method of proton conductor based on grafted titanium dioxide nanotube polyelectrolyte brush

A technology of polyelectrolyte brushes and titanium dioxide, applied in circuits, fuel cells, electrical components, etc., can solve the problems of low proton conductivity, high manufacturing cost, and limited applications, and achieve good proton conductivity and good water retention.

Inactive Publication Date: 2016-08-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Perfluorosulfonic acid resin has its own defects: 1) high manufacturing cost; 2) high dependence on water, which limits its further application, especially at high temperature
However, due to the low proton conductivity of titanium dioxide itself, high-temperature proton-conducting polyelectrolytes must be filled on the surface of the titanium dioxide nanotube matrix material to improve the proton conductivity of the membrane.

Method used

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  • A kind of preparation method of proton conductor based on grafted titanium dioxide nanotube polyelectrolyte brush
  • A kind of preparation method of proton conductor based on grafted titanium dioxide nanotube polyelectrolyte brush
  • A kind of preparation method of proton conductor based on grafted titanium dioxide nanotube polyelectrolyte brush

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Experimental program
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Effect test

preparation example Construction

[0023] Concrete preparation process is as follows:

[0024] Step 1: Add TiO 2 Nanotube, join in the there-necked flask, add triethylamine in the there-necked flask, then measure the azo initiator solution, transfer the initiator solution to the constant burette, N 2 For protection, the initiator solution in the constant burette was slowly dropped into the there-necked flask, stirred at room temperature for 24 hours, and the reacted product was transferred to the centrifuge tube, washed alternately with toluene and methanol solution, each solvent was washed three times, Finally, transfer the lower sediment in the centrifuge tube to a watch glass and dry at 30°C. The product after drying is an azo initiator anchored on TiO 2 Product after nanotube surface.

[0025] Step 2: Weigh TiO 2 The nanotube-initiator product is added to the two-necked bottle, and then the carbon-carbon double bond-containing electrolyte monomer solution is added to the two-necked bottle, and the air i...

Embodiment 1

[0028] Weigh 1.28g of TiO 2 Nanotubes, join in the there-necked flask of 250ml, add the triethylamine of 1ml in the there-necked flask, then measure the azo initiator solution of 50ml, 13mmol / L, transfer the initiator solution in the constant burette, N 2 For protection, the initiator solution in the constant burette was slowly dropped into the there-necked flask, stirred at room temperature for 24 hours, and the reacted product was transferred to the centrifuge tube, washed alternately with toluene and methanol solution, each solvent was washed three times, Finally, transfer the lower sediment in the centrifuge tube to a watch glass and dry at 30°C. The product after drying is an azo initiator anchored on TiO 2 Product after nanotube surface.

[0029] Weigh 1gTiO 2 Nanotube-initiator product, join in the two-neck bottle of 100ml, then measure 10mL of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid sodium salt mono The body solution (50% aqueous solution) was a...

Embodiment 2

[0034]This embodiment is roughly the same as Example 1, except that the concentration of different azo initiators is selected, which are respectively 0.5mmol / L, 2.8mmol / L, 5.5mmol / L, 11mmol / L, 13mmol / L, 5 groups of parallel products were obtained, the purpose is to investigate the effect of different initiator concentrations on the polymer grafting density.

[0035] Elemental analysis and testing were carried out on the 5 groups of products, and the obtained nitrogen content and monomer grafting density are shown in Table 1: It can be seen from Table 1 that with the continuous increase of the initiator concentration, the N element content and grafting density are both at the same time. However, when the initiator concentration reaches 13mmol / L, the content of N element basically no longer increases and reaches saturation. The relationship between the initiator concentration and the content of N element fully conforms to the first-order process reaction kinetics process. Using t...

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Abstract

The invention provides a preparation method of a proton conductor based on a grafted titanium dioxide nanotube polyelectrolyte brush. The method comprises the following steps: 1) adding a TiO2 nano tube to a reaction container, adding triethylamine to the reaction container, adding an azo initiator solution under protection of N2, agitating under the condition at room temperature, and then transferring the reacted product to a centrifuge tube, washing, finally baking the lower layer of sediments in the centrifuge tube after transferring, and taking the dried product as an initiator to anchor the product on the surface of the TiO2 nano tube; 2) adding the TiO2 nano tube-initiator product to the reaction container, then adding an electrolyte monomer containing carbon-carbon double bonds, removing the inside air by adopting a mode of freezing-unfreezing for a plurality of times in cycle, carrying out radical polymerization on a mixed solution from which the air is removed, and carrying out post-treatment on the reacted product, so as to obtain the final product. The polyelectrolyte brush has more ion groups in the unit volume, is good in water-retaining property of a membrane, and shows high proton conductivity at low humidity.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to a preparation method of a proton conductor based on a grafted titanium dioxide nanotube polyelectrolyte brush. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is expected to be used as a new clean energy in the fields of electric vehicles and backup power due to its high energy conversion efficiency, noiseless startup, and environmental friendliness. Increasing the operating temperature of the fuel cell can improve the low heat dissipation efficiency and eliminate the influence of two-phase flow, thereby reducing the complexity of the system. Moreover, high-temperature operation is expected to enable the application of non-Pt-based catalysts. The currently commonly used proton exchange membrane material is perfluorosulfonic acid resin (Nafion) produced by DuPont. Perfluorosulfonic acid resin has its own defects: 1) high manufacturing cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00H01M8/1072H01M8/1048H01M8/1069
CPCY02E60/50
Inventor 张海宁冯军黄亚琴
Owner WUHAN UNIV OF TECH
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