Preparation method of high-flexibility carbon/resin composite material

A technology of resin composite materials and flexibility, applied in carbon fiber, electrical components, circuits, etc., can solve the problems of low strength and conductance of bipolar plates, low conductivity, etc., to improve thermal oxygen aging stability and improve electrical conductivity , the effect of increasing the conductivity

Active Publication Date: 2021-12-10
宁波信远材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the conductivity of graphite / phenolic resin composite is lower than that of pure graphite, it can fully meet the requirements of PEMFC.
The strength and conductance of graphite / resin composite bipolar plates are both low

Method used

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  • Preparation method of high-flexibility carbon/resin composite material
  • Preparation method of high-flexibility carbon/resin composite material
  • Preparation method of high-flexibility carbon/resin composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of modified acrylic resin:

[0036] Take AA, MMA, BA, St and 4-(2-benzyloxycarbonylamino-4-thiazolyl)-4-carboxy-3-butenoic acid (2-methyl-2-buten-4-yl) ester , add butyl acetate solvent, mix evenly to obtain a mixed solution; then take butyl acetate, stir at a speed of 210rpm and heat up to 86°C, and then use a peristaltic pump to add dropwise to it for 4h; after the dropwise addition, keep warm for 3.5h, then add The initiator AIBN solution was kept warm for 3 hours; the temperature was lowered to 68°C, and part of the solvent and unreacted monomers were removed by vacuum distillation. At this time, the solid content of the copolymer was 60%; finally, the temperature was lowered to below 40°C and discharged.

[0037]Among them, AA, MMA, BA, St and 4-(2-benzyloxycarbonylamino-4-thiazolyl)-4-carboxy-3-butenoic acid (2-methyl-2-buten-4-yl) The molar ratio of esters is 1:0.71:1.1:0.64:0.95:0.6; the amount of initiator AIBN added is 0.47% of the total mass of m...

Embodiment 2

[0041] The difference between the preparation of modified acrylic resin and embodiment 1 is:

[0042] of AA, MMA, BA, St and 4-(2-benzyloxycarbonylamino-4-thiazolyl)-4-carboxy-3-butenoic acid (2-methyl-2-buten-4-yl) ester The molar ratio is 1:0.68:0.9:0.76:0.84:0.72; the addition amount of the initiator AIBN is 0.31% of the total mass of the monomers.

[0043] The difference between the preparation of the fuel cell bipolar plate and Example 1 is that the weight ratio of graphite felt to modified acrylic resin is 1:0.45, and the modified acrylic resin is prepared in this example; the thickness of the bipolar plate is 1.8mm.

Embodiment 3

[0045] The difference between the preparation of modified acrylic resin and embodiment 1 is:

[0046] of AA, MMA, BA, St and 4-(2-benzyloxycarbonylamino-4-thiazolyl)-4-carboxy-3-butenoic acid (2-methyl-2-buten-4-yl) ester The molar ratio is 1:0.62:0.84:0.77:0.82:0.65; the addition amount of the initiator AIBN is 0.54% of the total mass of the monomers.

[0047] The difference between the preparation of the fuel cell bipolar plate and Example 1 is that the weight ratio of graphite felt to modified acrylic resin is 1:0.27, and the modified acrylic resin is prepared in this example; the thickness of the bipolar plate is 2.3mm.

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Abstract

The invention discloses a preparation method of a high-flexibility carbon / resin composite material, and relates to the technical field of fuel cells. The preparation method specifically comprises the following steps: compounding carbon and modified acrylic resin, and carrying out hot press molding to obtain the carbon / resin composite material, and wherein the modified acrylic resin is prepared from the following raw materials: AA (Acrylic Acid), MMA (Methyl Methacrylate), BA (Butyl Acrylate), St and 4-(2-carbobenzoxy amino-4-thiazolyl)-4-carboxyl-3-butenoic acid (2-methyl-2-butene-4-yl) ester. The preparation method of the high-flexibility carbon / resin composite material provided by the invention is simple to operate, and the prepared composite material can be used for manufacturing a fuel cell bipolar plate and has excellent bending strength and high thermal oxidation stability; and moreover, the surface specific resistance is obviously reduced, and the gas barrier effect is excellent.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a preparation method of a highly flexible carbon / resin composite material. Background technique [0002] A fuel cell is an efficient green power generation device. Among them, the proton exchange membrane fuel cell (PEMFC) has the advantages of high efficiency, energy saving, stable operation and short cold start time. It has developed rapidly at the end of the 20th century, and has broad application prospects especially in vehicle drive power, portable power and household power stations. When the fuel cell cells are stacked, the separators separated from each other are called bipolar plates. It can isolate gas communication between cells, separate fuel hydrogen and oxygen, collect current, and support membrane electrodes. Therefore, the bipolar plate should have the following functions and characteristics: 1) a flow channel that can effectively distribute the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86C08F220/06C08F220/14C08F220/18C08F212/08C08F220/38D06M11/64D06M13/352D06M101/40
CPCH01M4/8652C08F220/06D06M11/64D06M13/352D06M2101/40C08F220/14C08F220/1804C08F212/08C08F220/387Y02E60/50
Inventor 杨峰灏金龙飞徐卫刚
Owner 宁波信远材料科技股份有限公司
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