Organic phosphorylated titanium dioxide micrballon-filled chitosan hybrid membrane as well as preparation and application

A technology of phosphating titanium dioxide and titanium dioxide, which is applied in the treatment of dyed low molecular organic compounds, fibrous fillers, electrochemical generators, etc., to achieve the effects of rich raw material sources, uniform and controllable particle size, and high proton conductivity

Inactive Publication Date: 2010-01-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For organophosphorylated titanium dioxide microspheres, and chitosan hybrid membranes containing it for DMFC membranes have not been reported yet

Method used

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  • Organic phosphorylated titanium dioxide micrballon-filled chitosan hybrid membrane as well as preparation and application
  • Organic phosphorylated titanium dioxide micrballon-filled chitosan hybrid membrane as well as preparation and application
  • Organic phosphorylated titanium dioxide micrballon-filled chitosan hybrid membrane as well as preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] At room temperature, add 6.81 g of butyl titanate to 107 g of ethylene glycol, and stir for 8 hours under the protection of nitrogen, then pour the above mixed solution of butyl titanate and ethylene glycol into an aqueous solution of acetone containing 0.3 wt % of water , control the concentration of butyl titanate in acetone to 0.01M, stir for 1h, let stand and age for 0.5h to produce a white precipitate, wash the precipitate repeatedly with deionized water and ethanol for 5 times, and dry at 80°C to obtain titanium dioxide Microspheres; at room temperature, 0.5g titanium microspheres were added to 30mL of 10wt% aminotrimethylenephosphonic acid (ATMP) aqueous solution, mechanically stirred for 12h, and then washed with deionized water until the supernatant Ph was neutral, Dry at 80° C. to obtain organophosphorylated titanium dioxide microspheres (sphere 1). The diameter of the ball 1 is about 250 nm.

[0019] Dissolve 1.0g of glacial acetic acid in 50mL of water to m...

Embodiment 2

[0022] At room temperature, add 6.81 g of butyl titanate to 107 g of ethylene glycol, and stir for 8 hours under the protection of nitrogen, then pour the above mixed solution of butyl titanate and ethylene glycol into an aqueous solution of acetone containing 0.3 wt % of water , control the concentration of butyl titanate in acetone to 0.03M, stir for 1h, let stand and age for 0.5h to produce a white precipitate, wash the precipitate with deionized water and ethanol repeatedly for 5 times, and dry at 80°C to obtain titanium dioxide Microspheres; at room temperature, 0.5g titanium microspheres were added to 30mL of 10wt% aminotrimethylenephosphonic acid (ATMP) aqueous solution, mechanically stirred for 12h, and then washed with deionized water until the supernatant Ph was neutral, Dry at 80° C. to obtain organophosphorylated titanium dioxide microspheres (sphere 2). The diameter of the ball 2 is about 370 nm.

[0023] Dissolve 1.0g of glacial acetic acid in 50mL of water to m...

Embodiment 3

[0025]At room temperature, add 6.81 g of butyl titanate to 107 g of ethylene glycol, and stir for 8 hours under the protection of nitrogen, then pour the above mixed solution of butyl titanate and ethylene glycol into an aqueous solution of acetone containing 0.3 wt % of water , control the concentration of butyl titanate in acetone to 0.05M, stir for 1h, let stand and age for 0.5h to produce a white precipitate, wash the precipitate with deionized water and ethanol repeatedly for 5 times, and dry at 80°C to obtain titanium dioxide Microspheres; at room temperature, 0.5g titanium microspheres were added to 30mL of 10wt% aminotrimethylenephosphonic acid (ATMP) aqueous solution, mechanically stirred for 12h, and then washed with deionized water until the supernatant Ph was neutral, Dry at 80° C. to obtain organophosphorylated titanium dioxide microspheres (sphere 3). The diameter of the ball 3 is about 510 nm.

[0026] Dissolve 1.0g of glacial acetic acid in 50mL of water to ma...

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Abstract

The invention relates to an organic phosphorylated titanium dioxide micrballon-filled chitosan hybrid membrane as well as a preparation and an application. The hybrid membrane is prepared by taking tetrabutyl titanate, glycol, organic phosphoric acid and chitosan as raw materials according to the following matching: the mole ratio of tetrabutyl titanate and glycol is 1:30-1:60 to prepare titanium dioxide micrballon, the mass volume ratio of titanium dioxide micrballon and organic phosphoric acid is 1:4-6, the mass ratio of titanium dioxide micrballon and chitosan is 0.05-0.2:1. The preparation method is as follows: the mixed solution of tetrabutyl titanate and glycol are precipitated in acetone water solution, washed and dried to obtain titanium dioxide micrballon which is put into organic phosphoric acid water solution for standing, the micrballon is put into glacial acetic acid water solution for ultrasound dispersion and is added with chitosan to obtain casting solution which subjects to casting on a substrate (glass plate) and is dried to form a membrane for crosslinking in sulphuric acid water solution, then washing and vacuum drying. The titanium dioxide micrballon and the membrane of the invention have rich source of raw materials, low cost and simple operation, and the prepared hybrid membrane has lower methanol permeability and higher proton conductivity, and can be used as direct methanol fuel cell membrane.

Description

technical field [0001] The invention relates to a chitosan hybrid membrane filled with organophosphorylated titanium dioxide microspheres capable of conducting protons, as well as its preparation and application. More specifically, the present invention is a phosphorylated titanium dioxide microsphere utilizing organic phosphoric acid (aminotrimethylene phosphonic acid and hydroxyethylene diphosphonic acid), and comprising organophosphorylated titanium dioxide microspheres, and has reduced permeability to methanol, Chitosan hybrid membrane with enhanced proton conductivity and improved thermal stability. Background technique [0002] Fuel cells use renewable resources instead of non-renewable resources to generate energy, and are recognized as one of the main technologies for future energy. A fuel cell is a high-efficiency power generation device that directly converts the chemical energy of fuel into electrical energy by electrochemical reaction without combustion. It has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L5/08C08K9/04C09C1/36C09C3/08H01M8/02H01M8/10H01M2/16H01M8/1041H01M8/1081H01M50/411
CPCY02E60/12Y02E60/523Y02E60/50
Inventor 吴洪侯伟强姜忠义
Owner TIANJIN UNIV
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