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Carbon fiber reinforced toughened epoxy resin composite material and preparation method thereof

A tough epoxy resin and composite material technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of sharp increase in viscosity, poor compatibility of epoxy resin, and low efficiency , to achieve the effect of reducing energy consumption and reducing the hot melt dissolution process

Inactive Publication Date: 2015-01-14
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] High-toughness and high-heat-resistant thermoplastic engineering plastics toughened high-performance epoxy resin is the direction of industrial development today, but the viscosity of thermoplastic engineering plastics increases sharply when added to the resin system, which makes molding and processing difficult, and the dispersion is also poor; due to thermoplastic The melting temperature of engineering plastics is high, and the compatibility with epoxy resin is not good. Usually, thermoplastic engineering plastic particles are used to directly interlayer carbon fiber reinforced epoxy resin composite materials, or thermoplastics and epoxy resin are melted and dissolved first, and then Preparation of composite materials with carbon fibers, but these technologies are complex, inefficient, and ineffective, and there is still a big gap between them and the actual application of industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Dissolve 5 parts of thermoplastic engineering plastic polyether ketone (PEK) in N,N-dimethylformamide solvent to make a 0.5wt% solution, and then add 55 parts of epoxy resin E-44, 20 Add 1 part of epoxy resin F-44, 25 parts of epoxy resin E-20, 8 parts of curing agent dicyandiamide and 0.5 part of accelerator 2-methylimidazole into the above solution, and mix well;

[0036] (2) Remove the solvent from the solution in (1) at 120°C under normal pressure for 15 minutes, and then remove the solvent at 120°C under vacuum for 10 minutes, and prepare the resin system from the solvent-free resin system into a resin film, using the conventional technology resin film melt impregnation method , the resin film is hot-melt-laminated with 160 parts of carbon fiber to prepare a carbon fiber-reinforced epoxy resin prepreg;

[0037] (3) According to the required size of the material, cut the prepreg in (2), lay up the layers, put it into the mold, and cure it at 120°C / 2h / 0.5MPa+160°...

Embodiment 2

[0040] (1) Dissolve 8 parts of thermoplastic engineering plastic polyetherimide (PEI) in N,N-dimethylacetamide solvent to make a 1.0wt% solution, and then add 60 parts of epoxy resin E-31 , 15 parts of epoxy resin E-51, 25 parts of epoxy resin F-51 and 22.2 parts of curing agent boron trifluoride monoethylamine are added to the above solution and mixed evenly;

[0041] (2) Remove the solvent from the solution in (1) at a certain 130°C under normal pressure for 20 minutes, and then remove the solvent at 130°C under vacuum for 15 minutes, prepare the resin system with the solvent removed into a resin film, and melt the resin film using conventional techniques Impregnation method, hot-melt lamination of resin film and 227 parts of carbon fiber to prepare carbon fiber reinforced epoxy resin prepreg;

[0042] (3) According to the required size of the material, cut the prepreg in (2), stack and lay it up, put it into the mold, and cure it at 130°C / 2h / 0.5MPa+170°C / 2h / 3.0MPa;

[0043...

Embodiment 3

[0045] (1) Dissolve 12 parts of thermoplastic engineering plastics polysulfone (PSF) in N-methyl-2-pyrrolidone solvent to make a 2.0wt% solution, then mix 50 parts of epoxy resin E-51, 50 parts of ring Add epoxy resin E-20 and 22.2 parts of curing agent 4,4'-diaminodiphenylsulfone to the above solution, and mix well;

[0046] (2) Remove the solvent from the solution in (1) at 140°C under normal pressure for 30 minutes, then remove the solvent at 140°C under vacuum for 20 minutes, and prepare a resin film from the solvent-removed resin system, using the conventional resin film melt impregnation method , the resin film is hot-melt-laminated with 226 parts of carbon fiber to prepare a carbon fiber-reinforced epoxy resin prepreg;

[0047] (3) According to the required size of the material, cut the prepreg in (2), lay up the layers, put it into the mold, and put it into the mold at 140°C / 2h / 0.5MPa+160°C / 2h / 4MPa+180°C / 2h / Curing reaction at 4MPa;

[0048] (4) Decrease the temperat...

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PUM

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Abstract

The invention belongs to the technical field of high polymer composite materials and relates to a carbon fiber reinforced toughened epoxy resin composite material and its preparation method. The high polymer material is prepared from the following components, by weight, 100 parts of epoxy resin, 8-120 parts of a curing agent, 0.5-1.5 parts of a promoter, 160-500 parts of carbon fiber and 5-55 parts of thermoplastic. According to the invention, engineering thermoplastic is selected as a flexibilizer, and an appropriate solvent is selected; the engineering thermoplastic is made into a solution, and the solution is uniformly mixed with epoxy resin, the curing agent and the promoter; the solvent is removed; the resin system with the solvent removed is made into a resin film; by a routine resin film melt impregnation method, the resin film and carbon fiber undergo hot melting to be combined so as to prepare a carbon fiber reinforced epoxy resin prepreg; and furthermore, the highly-toughened carbon fiber reinforced toughened epoxy resin composite material is prepared.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and relates to a carbon fiber reinforced epoxy resin composite material and a preparation method thereof. Background technique [0002] Carbon fiber reinforced epoxy resin composite material is a high-performance composite material with epoxy resin as the matrix and carbon fiber as the reinforcement. It is mainly used in aerospace, transportation, medical, energy, sports and leisure and other fields. With the continuous advancement of science and technology such as aerospace, carbon fiber reinforced epoxy resin composites have attracted increasing attention, but the weakness of poor impact toughness has also affected its wide application. Therefore, the epoxy resin matrix and its composite materials are increasingly developing in the direction of high toughness. [0003] The general-purpose epoxy resin is brittle after curing, and its impact toughness, flexural strength and h...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L63/02C08L79/08C08L81/06C08L61/16C08L71/10C08K7/06C08K3/04C08J5/04B32B27/04B32B27/38B32B37/08
Inventor 杨桂生刘明昌
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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