High-composite performance benzimidazole-containing aromatic polymer fiber and preparation method thereof

An aromatic polymer and benzimidazole technology, which is applied in the field of aromatic polymer fiber and its preparation, can solve the problems of damaged fiber body mechanical properties, chain scission, etc., achieve high composite performance and improve the effect of bonding strength

Active Publication Date: 2017-05-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present inventor has previously used the method of direct fluorination (CN102587058A, CN104911895A) and the method of derivatization and grafting on the basis of direct fluorination (CN20161031422.4) to treat the surface of aromatic polymer fibers. The composite properties of aromatic polymer fibers (the interlayer shear strength is improved), but the inventors found in further research (Cheng Z, Wu P, Li B, et al.Surface chain cleavage behavior of PBIA fiber induced by direct fluorination [J].Applied Surface Science,2016,384:480-486.), during the direct fluorination process, fluorine gas will chemically react with the amide bond on the macromolecular chain of aramid fiber, resulting in the chain scission of the macromolecular chain on the surface Occurrence, when the degree of fluorination is high, the mechanical properties of the fiber body will be damaged to a certain extent

Method used

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  • High-composite performance benzimidazole-containing aromatic polymer fiber and preparation method thereof
  • High-composite performance benzimidazole-containing aromatic polymer fiber and preparation method thereof
  • High-composite performance benzimidazole-containing aromatic polymer fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] First soak the aramid III fiber statically in 0.03% Fe at 50°C 3+ In the mixed solution that the mixed solvent of ethanol and water (wherein the volume fraction of water is 7%) made reacts 30min and dries, then the obtained unsaturated coordination Fe 3+ The fibers are soaked in ethanol solvent of polyethyleneimine with a concentration of 0.006% at 50°C for 10 minutes and then dried.

[0026] Add the obtained aramid III fiber with high composite performance into the epoxy resin matrix to prepare the corresponding composite material. The relevant properties of the obtained fiber and composite material are shown in the attached table.

Embodiment 2

[0028] First soak the aramid III fiber statically in 0.01% Cu at 10°C 2+ isopropanol and water mixed solvent (wherein the volume fraction of water is 3%) in the mixed solution that is made of reacting 5min and then drying, then the obtained unsaturated coordination Cu 2+ The fibers are soaked in ethanol solvent of polyvinylamine with a concentration of 0.001% at 70°C for 60 minutes and then dried.

[0029] Add the obtained aramid III fiber with high composite performance into the epoxy resin matrix to prepare the corresponding composite material. The relevant properties of the obtained fiber and composite material are shown in the attached table.

Embodiment 3

[0031] First soak the aramid III fiber statically in 0.1% Ni at 70°C 2+ isopropanol and water mixed solvent (wherein the volume fraction of water is 1%) in the mixed solution that is made of reacting 60min and drying, then the obtained unsaturated coordination Ni 2+ The fiber is soaked in ethylenediamine ethanol solvent with a concentration of 0.01% at 10°C for 60 minutes and then dried.

[0032] Add the obtained aramid III fiber with high composite performance into the epoxy resin matrix to prepare the corresponding composite material. The relevant properties of the obtained fiber and composite material are shown in the attached table.

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Abstract

High-composite performance benzimidazole-containing aromatic polymer fiber disclosed by the invention is prepared according to the following steps: first statically or dynamically and continuously soaking the fiber into a mixed solution of a transition metal ion-containing organic polar solvent and water for reacting, drying, then statically or dynamically and continuously soaking the fiber into a polyamino amine compound-containing ethanol solution for reacting, and performing vacuum drying to obtain the fiber having active amino groups reactive with resin on the surface; a composite material formed by the prepared aramid III fiber and epoxy resin has the interlayer shear strength of 52-58MPa and the impregnated filament strength of 5.5-5.8GPa; a composite material formed by the prepared polyimide fiber and epoxy resin has the interlayer shear strength of 35-40MPa and the impregnated filament strength of 3.3-3.5GPa. Due to adoption of a first-complexing and then-coordinating grafting method, the physical and chemical structures of a fiber body are not destroyed, the mechanical properties of the fiber body are reduced, and non-damage modification can be achieved to obtain high-composite performance aromatic polymer fiber.

Description

technical field [0001] The invention belongs to the technical field of aromatic polymer fiber and its preparation, and in particular relates to an aromatic polymer fiber containing benzimidazole with high composite performance and a preparation method thereof. Background technique [0002] Aromatic polymer fibers are high-strength and high-modulus organic fibers, mainly including aromatic polyamide fibers (such as homopolymerized aramid II and copolymerized aramid III fibers) and polyimide fibers, which have been widely used It is used in bulletproof products, building materials, special protective clothing and electronic equipment, and its composite materials made with resin have also been used in aerospace, national defense and military industries. However, due to the high crystallinity, high orientation and smooth surface structure of aromatic polymer fibers, their composite properties with resins are poor, so that the composite materials prepared by them cannot fully mee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/00D06M13/00D06M15/61D06M13/332C08J5/06C08L63/00C08L77/10D06M101/36
CPCC08J5/046C08J5/06C08J2363/00C08J2477/10D06M11/00D06M13/00D06M13/332D06M15/61D06M2101/36
Inventor 刘向阳程政王旭洪达伟罗龙波刘昌莉
Owner SICHUAN UNIV
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