Periodic mesoporous organosilicon material and preparation method of polymer composite material thereof

A technology of mesoporous organosilicon and composite materials, applied in fuel cells, electrochemical generators, electrical components, etc., can solve problems such as narrow operating temperature range, and achieve the effects of low production cost, mild preparation conditions and broad application prospects.

Inactive Publication Date: 2017-11-21
FUJIAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the current problems of high humidity dependence, fuel permeation and narrow operating temperature range of proton exchange membranes, the present invention provides a non-porous proton exchange membrane material and its control method that simultaneously realizes low humidity dependence, wide temperature range and high proton conductivity , the preparation method synthesizes a high-performance fuel cell proton exchange membrane material through a one-dimensional pore-encapsulated polymer of periodic mesoporous silicone

Method used

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  • Periodic mesoporous organosilicon material and preparation method of polymer composite material thereof
  • Periodic mesoporous organosilicon material and preparation method of polymer composite material thereof
  • Periodic mesoporous organosilicon material and preparation method of polymer composite material thereof

Examples

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Embodiment 1

[0041] This embodiment relates to a method for preparing a periodic mesoporous organic silicon material, which includes the following steps:

[0042]Stir octadecyltrimethylammonium chloride (3.2mmol), 6mol / L NaOH (30.4mmol), and distilled water (3.3mol) in a beaker until clear, and add 4,4'-bis(triethyl Oxysilyl)-1,1'-biphenyl (2.5mmol) was stirred at room temperature for 20h, and then the mixture was added to a 100mL polytetrafluoroethylene reactor, and the reactor was placed in a heated To 95 ℃ blast oven, react for 22h. After the reaction was over, the reactor was taken out from the drying oven and cooled to room temperature naturally. A white mixture was obtained, which was filtered with suction. The obtained filter cake is used as a solvent for Soxhlet extraction with an acidic solution of ethanol to remove the pore-forming agent in the channel. The PMO-1 material with the pore-forming agent removed was placed in a vacuum oven at 80°C for activation for 24 hours, water...

Embodiment 2

[0044] This example relates to a method for preparing a periodic mesoporous organosilicon material. The difference between this method and Example 1 is that n-octyltrimethylammonium chloride (3.2mmol) replaces octadecyltrimethyl Ammonium chloride was used as a porogen, and the resulting matrix was denoted as PMO-2. The N of the activated PMO-2 at 77K 2 The adsorption isotherm is as image 3 as shown in a. The isotherm adsorption curve of PMO-2 also shows a typical type IV curve, indicating that PMO-2 also has mesoporous characteristics and its BET specific surface area is 385m 2 / g. At the same time, nonlocal density function theory (NLDFT) also analyzes the pore size distribution of PMO-2, such as image 3 As shown in b, it shows that the pore size of PMO-2 is concentrated in and two places, but mainly in place. The activated PMO-2 was tested for proton conduction, and no semi-rings were observed in the test, indicating that the proton conductivity of the framework...

Embodiment 3

[0047] This embodiment relates to the method for preparing PANI@PMO-1 proton exchange membrane by using the PMO-1 prepared in Example 1, such as figure 1 shown, including the following steps:

[0048] Weigh 0.2g of the activated PMO-1 material, soak it in the mixed system of 8mL aniline and 10mL acetone for 24h, centrifuge, and keep the solid. Use 10 mL of phosphoric acid solution with a pH of 0.5 to transfer the above solid into a 100 mL single-necked bottle, and then place the mixed system in a water bath at -5-10°C. Weigh 0.3g of ammonium persulfate into 30mL of phosphoric acid solution with a pH of 0.5, then add this solution dropwise to the mixing system of the single-neck flask at a rate of 1mL / min, and react in a water bath at -5 to 10°C for 6h. Suction filtration, wash the filter cake with acetone until the filtrate is colorless, then place the solid in a vacuum oven at 80°C to activate for a week, remove water and solvent molecules, and obtain a low humidity dependen...

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Abstract

The invention discloses a periodic mesoporous organosilicon material and a preparation method of a polymer composite material thereof. The method comprises the following steps: preparing periodic mesoporous organosilicon with different pore sizes by using organosilicate ester under the regulation and control of a pore former; and importing monomer micromolecules into PMO pores, and performing limited range polymerization to prepare a nonporous high proton conducting material with wide temperature domain and low humidity dependence. The nonporous material can effectively solve the problematic issues of high humidity dependence, fuel penetration and catalyst poisoning and the like can be effectively solved. The material prepared under the regulation and control can maintain the high proton conductivity of 10-2S cm-1 at the relative humidity (RH) 35% and 95%RH, and the intrinsic conductivity has high proton conducting behaviors exceeding 10-3S cm-1 within a temperature range of -40 DEG C to 130 DEG C, and the maximum value reaches 10-2S cm-1, and meanwhile, 77K nitrogen adsorption data show that the nonporous material with a specific surface area of 15.9m2g-1 can be prepared by the regulation and control method.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a preparation method of a high-performance high-temperature proton exchange membrane material in a fuel cell, and more specifically to a one-dimensional mesoporous channel encapsulation linear high Molecular Polymer Synthesis of Low Humidity Dependence Non-Porous Proton Exchange Membrane Materials for Fuel Cells. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC) is a power generation device that directly converts the chemical energy of fuel into electrical energy without combustion. It has a high energy conversion rate and is environmentally friendly and pollution-free. It is considered to be the first choice in the 21st century. efficient and clean power generation technology. Proton exchange membrane (PEM) is one of the key materials of PEMFC, which has the function of conducting protons and isolating fuel and oxidant. At present, the most res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1069H01M8/1041H01M8/1058
CPCH01M8/1041H01M8/1058H01M8/1069Y02E60/50
Inventor 项生昌张章静吴玲马秀玲
Owner FUJIAN NORMAL UNIV
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