Composite material function modification method based on co-curing and reaction inductive phase separation

A composite material and induced phase technology is applied in the field of functional modification of composite materials, which can solve the problems that the electrical and thermal conductivity of resin cannot be effectively improved, the electrical conductivity of resin cannot be improved, and carbon nanotubes are difficult to enter, and the co-curing process is simple and cost-effective. Low, use-reduced effects

Active Publication Date: 2015-11-25
SHANDONG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

The fundamental defect of these two types of process methods is: for the former, the electrical and thermal conductivity modification only occurs on the interface between the fiber bundle and the surrounding resin or the interface between the fiber fabric and the surrounding resin, and the resin between the fiber bundles or between the fiber fabrics Relative to the enriched area, the electrical and thermal conductivity of the resin cannot be effectively improved, resulting in the inability to establish an effective conductive network in the thickness direction of the laminate; for the latter, the electrical and thermal conductivity modification only occurs at the lamination interface of two adjacent prepregs On the other hand, it is difficult for carbon nanotubes to enter the resin-rich area inside each ply prepreg, which cannot improve the resin conductivity inside each ply prepreg, and therefore cannot establish an effective conductive network in the thickness direction of the ply.

Method used

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  • Composite material function modification method based on co-curing and reaction inductive phase separation

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1: Preparation of carbon fiber composite materials with lightning strike and deicing functions based on the E51 / PEI / CNTs hybrid system

[0040] Dissolve polyetherimide (PEI) in dichloromethane, and evaporate most of the solvent at room temperature; add carbon nanotubes to liquid epoxy resin E51 at a ratio of 1 to 5 wt%, and use mechanical stirring and ultrasonic dispersion, etc. The device is stirred evenly. Add PEI into the liquid epoxy resin mixed with carbon nanotubes in the proportion of 10-30wt%, and use mechanical stirring and ultrasonic dispersion to stir evenly to obtain a stable E51 / PEI / CNTs mixed system. Cut the carbon fiber prepreg and lay it up according to [45° / 0° / -45° / 90°] to obtain a laminated prepreg structure. Cut the dry carbon fiber cloth and lay up layers according to [45° / 0° / -45° / 90°] to obtain a dry carbon fiber preform. The laminated prepreg structure and dry carbon fiber preform are brought together. In the prepared E51 / PEI / CNTs materi...

Embodiment 2

[0044] Example 2: Preparation of carbon fiber composite materials with lightning strike and deicing functions based on the E51 / PES / CNTs hybrid system

[0045] Add carbon nanotubes into liquid epoxy resin E51 at a ratio of 1 to 5 wt%, and stir evenly with devices such as mechanical stirring and ultrasonic dispersion; Heat-melt it into the liquid epoxy resin mixed with carbon nanotubes at high temperature, and use mechanical stirring and ultrasonic dispersion to stir evenly to obtain a stable E51 / PES / CNTs mixed system. According to the method of Example 1, a carbon fiber composite material with a lightning-resistant and deicing surface functional layer was obtained.

Embodiment 3

[0046] Example 3: Preparation of a structure-function integrated composite material with wave-absorbing and stealth functions

[0047] The functional particles in the above-mentioned Example 1 were replaced with carbonyl iron powder and FeNi nano-powder with a content of 1 to 5 wt%. According to the method of Example 1, a composite material with a surface functional layer was obtained. The test results showed that: Compared with the composite material control group of particles, the composite material of the present invention has higher microwave absorption effect and higher interlayer crack resistance performance.

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Abstract

The invention discloses a composite material function modification method based on co-curing and reaction inductive phase separation. Thermosetting resin serves as the carrier, thermoplastic resin serves as second-phase modified thermosetting resin, electric conduction and heat conduction nanoparticles serve as the function phase, a co-curing molding process is adopted, and based on the reaction inductive phase separation technology, a carbon fiber composite laminated plate which is provided with a surface function layer is prepared. Through the method, the low-cost and multi-functional carbon fiber composite laminated plate is obtained, and the design and preparation of a composite material by way of integration of structure and function are achieved.

Description

technical field [0001] The invention relates to the field of preparation of fiber reinforced materials, in particular to a method for functional modification of composite materials based on co-curing and reaction-induced phase separation. Background technique [0002] Advanced fiber-reinforced resin-based composites have been widely used in aviation and aerospace fields due to their high specific strength and specific modulus, strong designability, and good corrosion resistance. Resin-based composite laminates are the main form of application structure. Today, the aviation and aerospace industries are not limited to the improvement of the mechanical properties of fiber-reinforced resin-based composite materials, but to integrate more functions on the basis of ensuring the structural integrity of composite materials, and to prepare multi-functional structures with integrated structure and function. Advanced resin matrix composites. [0003] Resin-based composite laminates a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L79/08C08L81/06C08K7/24C08K7/06C08K3/08C08K3/28C08K3/22
Inventor 董琪贾玉玺万国顺郭云力
Owner SHANDONG UNIV
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