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High-performance fiber material with high-strength and high-toughness composite performance and preparation method of high-performance fiber material

A high-performance fiber, high-strength and high-toughness technology, applied in the direction of carbon fiber, fiber treatment, fiber type, etc., can solve the problems of not considering the interface toughness, unfavorable interface toughness, interface rigidity, etc., and achieve the suppression of the mechanical properties of the fiber itself. Effects of suppressing adverse effects and improving interfacial bond strength

Pending Publication Date: 2021-07-13
SHANDONG NON METALLIC MATERIAL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods only consider the interface bonding performance, but do not consider the toughness of the interface, and the fiber and the resin are only connected by covalent bonds, and the interface rigidity is relatively large, which is not conducive to the effective improvement of the interface toughness.

Method used

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  • High-performance fiber material with high-strength and high-toughness composite performance and preparation method of high-performance fiber material
  • High-performance fiber material with high-strength and high-toughness composite performance and preparation method of high-performance fiber material
  • High-performance fiber material with high-strength and high-toughness composite performance and preparation method of high-performance fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The aramid II fiber is directly fluorinated by the method disclosed in the prior art under a partial pressure of fluorine gas of 1kPa and a partial pressure of nitrogen gas of 10kPa, and then the fluorinated fiber is placed in a static state dissolved with a mass percentage concentration of 1% In the phenylenediamine acetonitrile solution, react at 30 °C for 30 min and then dry, and then statically soak the aramid II fibers containing amino groups in the acetonitrile of diphenylmethane diisocyanate with a concentration of 2% by mass in acetonitrile at 50 °C. The reaction was carried out for 20 min, followed by washing and drying to obtain aramid II fibers grafted with reactive porous flexible polyurea foam on the surface. The obtained fiber strength retention rate is shown in the attached table.

[0030] The obtained aramid II fiber with high composite performance was added to the epoxy resin matrix to prepare the corresponding composite material, and the interface prop...

Embodiment 2

[0032] First, the aramid II fiber is directly fluorinated by the method disclosed in the prior art under the partial pressure of fluorine gas of 0.5 kPa and the partial pressure of nitrogen gas of 5 kPa, and then the fluorinated fiber is statically soaked in a mass percentage concentration of 2% The phenylenediamine-nitrile solution was soaked and reacted at 50 °C for 60 min and then dried, and then the aramid II fiber was statically soaked in the acetonitrile solution of toluene diisocyanate with a concentration of 1% by mass, reacted at 40 °C for 60 min, and then After washing and drying, the aramid II fibers with reactive porous soft polyurea foam grafted on the surface can be obtained. The obtained fiber strength retention rate is shown in the attached table.

[0033] The obtained high-composite aramid II fiber was added to the phenolic resin system to prepare the corresponding composite material, and the interface properties of the composite material are shown in the atta...

Embodiment 3

[0035] The aramid II fabric (cloth) is directly fluorinated by the method disclosed in the prior art under a fluorine partial pressure of 5kPa and a nitrogen partial pressure of 50kPa, and then the fluorinated fiber is placed in a static state with a mass percentage concentration of dissolved In the acetonitrile solution of 5% m-phenylenediamine, react at 20 °C for 10 minutes and then dry, and then statically soak the aramid II fibers containing amino groups on the surface in 1,6-hexamethylene diisocyanate trimer with a concentration of 5% by mass. In the acetonitrile solution, the reaction was carried out at 80 °C for 5 min, followed by washing and drying to obtain the aramid II fiber grafted with reactive porous flexible polyurea foam on the surface. The obtained fiber strength retention rate is shown in the attached table.

[0036] The obtained aramid II fiber with high composite performance was added to the epoxy resin matrix to prepare the corresponding composite material...

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Abstract

The invention belongs to the technical field of high-performance fibers and preparation thereof, and particularly relates to a high-performance fiber material with high-strength and high-toughness composite performance and a preparation method of the high-performance fiber material. After fibers are directly fluorinated, C-F active sites are introduced to the surface of a fiber material, then a series of groups or compounds are chemically grafted to the surface of the fiber material, a soft porous foam layer having reaction activity with a base material is generated on the surface of the fiber material, and interface layer stress is dispersed and impact energy is absorbed through the porous foam layer, so that the toughness of the composite material is further improved. Meanwhile, the fiber material and the base material are tightly combined through the covalent bonds in multiple directions, the interface bonding strength of the composite material is greatly improved on the basis that the hybrid interface structure is toughened, and therefore the mechanical strength and toughness of the composite material are improved on the whole.

Description

technical field [0001] The invention belongs to the technical field of high-performance fibers and their preparation, and in particular relates to a high-performance fiber material with high-strength and high-toughness composite properties and a preparation method thereof. Background technique [0002] Fiber-reinforced resin matrix composites (FRPs) have been widely used in aerospace, defense and military fields such as spacecraft shells, vehicle lightweight protective armor, and individual soldier protection due to their outstanding advantages such as light weight, high strength, and high service stability. application. With the increasingly stringent service performance requirements of materials in various engineering fields, materials are gradually faced with more high-frequency loads, high-impulse dynamic loads and other load situations, which have put forward new requirements on the basis of the high-strength and light-weight properties of composite materials. - High t...

Claims

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Application Information

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IPC IPC(8): D06M11/09D06M13/335D06M13/395D06M13/432D06M101/30D06M101/36D06M101/40
CPCD06M11/09D06M13/335D06M13/395D06M13/432D06M2101/36D06M2101/30D06M2101/40
Inventor 宫平罗龙波吕钧炜张鹏朱晓琳钟蔚华刘向阳金子明曲志敏虢忠仁王旭刘洋
Owner SHANDONG NON METALLIC MATERIAL RES INST
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