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In-situ three-dimensional resin composites and their applications

A resin composite material, three-dimensional technology, used in synthetic resin layered products, coatings, chemical instruments and methods, etc., can solve problems such as poor interlayer performance, and achieve the effect of improving mechanical properties and easy control.

Active Publication Date: 2021-06-18
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor interlayer performance of fiber-reinforced resin-based composite materials at present, and use the characteristics of interpenetrating network structure to construct thermoplastic fiber structure in situ and form a three-dimensional structure with fiber cloth to improve the interlayer performance of composite materials

Method used

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  • In-situ three-dimensional resin composites and their applications
  • In-situ three-dimensional resin composites and their applications
  • In-situ three-dimensional resin composites and their applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of prepreg

[0029] Mix 50g of diphenylmethane bismaleimide (this raw material is used below), 50g of diallyl bisphenol A and 30g of polyphenylene ether (Mn: 2200), stir at 130°C until the solution is transparent and continue Stir for 30 minutes to obtain a polymer prepolymer. After cooling, dissolve it in N,N′-dimethylformamide until the solution is transparent. Weigh 120g of carbon fiber cloth (3K) and cut it into 10 cloths of the same size. , brush the prepolymer solution evenly on both sides of the fiber cloth to obtain a prepreg.

[0030] (2) Preparation of composite materials

[0031]After the dried prepregs are laminated, put them into a flat mold (the size of the mold is the same as that of the prepreg fiber cloth), heat at 150°C for about 30 minutes, and when the resin gels, add Press to 10MPa, and cure according to the temperature programming condition of 160°C / 2h+180°C / 2h+200°C / 2h to obtain a composite material laminate. If the laminate is ...

Embodiment 2

[0040] (1) Preparation of prepreg

[0041] Stir the mixture of 50g bismaleimide, 50g diallyl bisphenol A and 40g polyphenylene ether (Mn: 2200) at 130°C until the solution is transparent, then continue to stir for 30min to obtain a polymer prepolymer, cool Then dissolve it in N,N′-dimethylformamide until the solution is transparent, weigh 140g of carbon fiber cloth (3K), cut it into 10 pieces of cloth with the same size, and brush the prepolymer solution evenly onto the fiber Cloth both sides to get prepreg.

[0042] (2) Preparation of composite materials

[0043] After the dried prepregs are laminated, put them into a flat mold (the size of the mold is the same as that of the prepreg fiber cloth), heat at 150°C for about 30 minutes, and when the resin gels, add Press to 10MPa, and cure according to the temperature programming condition of 160°C / 2h+180°C / 2h+200°C / 2h to obtain a composite material laminate.

Embodiment 3

[0052] (1) Preparation of prepreg

[0053] Stir the mixture of 50g bismaleimide, 50g diallyl bisphenol A and 50g polyphenylene ether (Mn: 2200) at 130°C until the solution is transparent, then continue to stir for 30min to obtain a polymer prepolymer, cool Then dissolve it in N,N′-dimethylformamide until the solution is transparent, weigh 150g of carbon fiber cloth (3K), cut it into 10 pieces of cloth with the same size, and brush the prepolymer solution evenly onto the fiber Cloth both sides to get prepreg.

[0054] (2) Preparation of composite materials

[0055] After the dried prepregs are laminated, put them into a flat mold (the size of the mold is the same as that of the prepreg fiber cloth), heat at 150°C for about 30 minutes, and when the resin gels, add Press to 10MPa, and cure according to the temperature programming condition of 160°C / 2h+180°C / 2h+200°C / 2h to obtain a composite material laminate.

[0056] Table 3 shows the mechanical properties of the composite ma...

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Abstract

The invention discloses an in-situ three-dimensional resin composite material and its application. It mainly uses a thermosetting resin system, polyphenylene ether, curing agent and fiber cloth as raw materials, and obtains a composite material with an in-situ three-dimensional weaving structure through hot-press curing treatment. Material. The composite material prepared by the invention has excellent bending strength and interlaminar shear performance, and is obviously superior to the mechanical properties of the composite material without adding polyphenylene ether. The technology of the invention effectively solves the problem of poor strength of the fiber-reinforced composite material layer, and the prepared composite material has outstanding application value in aviation, aerospace and other fields.

Description

technical field [0001] The invention relates to the field of high-performance resin-based composite materials, and specifically designs an in-situ three-dimensional resin composite material and a preparation method thereof. Background technique [0002] As a high-strength and lightweight material, fiber-reinforced resin-based composites are widely used in aviation, aerospace and other fields. However, as a fiber-reinforced composite material, its biggest problem is the delamination phenomenon between the material layers, which will lead to a significant reduction in the structural strength and stiffness of the material, seriously affecting its performance, and greatly limiting its application in aerospace primary and secondary load-bearing structures. application. In practical applications, the delamination phenomenon of composite materials can be weakened by toughening the interlayer of composite materials. At present, the methods of interlayer toughening of composite mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/06B32B37/10B32B9/00B32B9/04B32B17/04B32B17/12B32B27/04B32B27/28C08L79/08C08L71/12C08L63/00C08K7/06
CPCB32B5/02B32B5/26B32B37/06B32B37/10B32B2038/0076B32B2250/20B32B2255/02B32B2255/26B32B2262/101B32B2262/106B32B2307/546B32B2307/558C08L79/085C08L2205/04C08L71/123C08K7/06C08L63/00
Inventor 袁莉王泽浩梁国正顾嫒娟
Owner SUZHOU UNIV