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Preparation method of a high-strength, solvent-resistant, rapidly disassembled and recyclable epoxy fiber composite material

A composite material and epoxy fiber technology, applied in the field of polymer materials, can solve the problems of poor strength, late start, difficulty in fast disassembly and efficient recycling, and achieve high strength and solvent resistance.

Active Publication Date: 2022-03-15
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with other physical methods for recycling fiber materials, the method of introducing dynamic bonds into polymers to realize dismantling and recycling of fiber composites started relatively late, and there are relatively few studies
For example, epoxy fiber composites based on aliphatic dynamic ester bonds have poor strength and require long-term high-temperature heating to disassemble (Advanced Functional Materials, 26(33):6098-6106)
In addition, epoxy fiber composites based on aromatic disulfide bonds use epoxy curing agents with aromatic disulfide bonds. Although they have high strength, they take a long time to disassemble, making it difficult to achieve rapid disassembly and Recycling (Materials Horizons, 3(3):241-247)
At present, for high-strength, solvent-resistant epoxy fiber composites, it is still difficult to realize their rapid disassembly and efficient recycling

Method used

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  • Preparation method of a high-strength, solvent-resistant, rapidly disassembled and recyclable epoxy fiber composite material
  • Preparation method of a high-strength, solvent-resistant, rapidly disassembled and recyclable epoxy fiber composite material

Examples

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Effect test

Embodiment 1

[0017] The epoxy monomer (BGPDS) with aromatic disulfide bonds and the epoxy curing agent (AFD) with aromatic disulfide bonds are used to compound with carbon fiber materials, and cured at 160 degrees for 3 hours to obtain high aromatic disulfide bonds. Strong solvent resistant fast dismantling epoxy carbon fiber composite. The specific preparation process is as follows. Dithiodiphenyl diglycidyl ether is used as the epoxy monomer, dithiodiphenylamine is used as the epoxy curing agent, and three-dimensional carbon fiber cloth is used as the fiber material. After the polymer and the fiber material are fully impregnated, React at 160 degrees for 3 hours to prepare epoxy carbon fiber composites based on aromatic disulfide bonds. Subsequently, the rapid disassembly and fiber recovery of the epoxy composite was achieved by soaking in a dithiothreitol (DTT) dilute solution at room temperature or under heating conditions, as figure 1 shown. When the epoxy matrix is ​​quickly and co...

Embodiment 2

[0019] Use epoxy monomers with aromatic disulfide bonds and epoxy curing agents with aromatic disulfide bonds to compound with glass fiber materials, and cure at 160 degrees for 3 hours to obtain high-strength, solvent-resistant and fast curing based on aromatic disulfide bonds Disassembled epoxy fiberglass composite. The specific preparation process is as follows. Dithiodiphenyl diglycidyl ether is used as the epoxy monomer, dithiodiphenylamine is used as the epoxy curing agent, and three-dimensional glass fiber cloth is used as the fiber material. After the polymer and the fiber material are fully impregnated , and reacted at 160 degrees for 3 hours to prepare epoxy-glass fiber composites based on aromatic disulfide bonds. Subsequently, the rapid disassembly and fiber recovery of the epoxy composite was achieved by immersion in a dilute solution of dithiothreitol at room temperature or under heating. When the epoxy matrix is ​​quickly and completely dissolved in the solvent...

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Abstract

The invention proposes a method for preparing a high-strength, solvent-resistant, rapidly disassembled and recyclable epoxy fiber composite material, which belongs to the field of polymer materials. By adopting the epoxy monomer and curing agent containing exchangeable dynamic bonds as the polymer matrix, and compounding with the fiber, a high-strength, solvent-resistant, rapidly disassembled and recyclable epoxy fiber composite material is obtained. The material has the advantages of excellent mechanical properties and high-temperature solvent resistance, and at the same time, the epoxy fiber composite material can be quickly disassembled under a specific solvent to realize the recycling of fibers in the material. The proposal of the present invention will further promote the practical application of high-performance, rapidly disassembled and recyclable epoxy fiber composite materials.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a method for preparing a high-strength, solvent-resistant, rapidly detachable and recyclable epoxy fiber composite material. Background technique [0002] Due to the advantages of light weight and high strength, fiber composite materials are widely used in aerospace, automobile industry, rail transit and sporting goods and other fields. Among many fiber-reinforced polymer composites, epoxy-based fiber composites occupy an irreplaceable position due to their stable structure, excellent performance, low shrinkage and chemical corrosion resistance, including automotive parts and wind power blades. However, due to the three-dimensional crosslinked network structure of epoxy, epoxy composites are difficult to dissolve, reprocess, and recycle after curing, which makes it difficult to recycle and recycle fiber-reinforced epoxy composites. With the increase of the global production of epo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K7/06C08K7/14
CPCC08K7/06C08K7/14C08L63/00
Inventor 陈茂司鸿玮赵秀丽周琳吴冶平廖宏陈茂斌陈忠涛张银宇
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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