Graphene/boron nitride fiber composite and preparation method thereof

A boron nitride fiber and composite material technology, which is applied in fiber processing, textiles and papermaking, etc., can solve the problems of poor moisture resistance of boron nitride fibers, and achieve the effects of large application value, uniform distribution and high interface adhesion strength.

Inactive Publication Date: 2018-04-03
HANGZHOU GAOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the particularity of the preparation process and the characteristics of the material itself, the moisture resistance of boron nitride fiber is poor

Method used

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  • Graphene/boron nitride fiber composite and preparation method thereof
  • Graphene/boron nitride fiber composite and preparation method thereof
  • Graphene/boron nitride fiber composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) The surface of the boron nitride fiber is repeatedly coated and dried with an aqueous dispersion of graphene oxide, and the number of cycles is 15 times to obtain a boron nitride fiber coated with graphene oxide on the surface. The thickness of the graphene oxide layer is 3 μm;

[0028] (2) The boron nitride fiber coated with graphene oxide obtained in step (3) is placed in water for surface swelling, and then the fibers are overlapped and dried to form a non-woven fabric, and the drying temperature is lower than 100°C.

[0029] (3) The graphene oxide crosslinked boron nitride fiber obtained in step (2) was placed in a closed kettle containing hydrazine hydrate, and reduced at 80° C. for 12 hours.

[0030] Through the above steps, the graphene is coated on the surface of the boron nitride fiber, and the surface of the boron nitride fiber and the graphene sheet are connected by van der Waals force and hydrogen bond. The boron nitride fibers are cross-linked through ...

Embodiment 2

[0034] (1) Use the N,N-dimethylformamide dispersion of graphene oxide to repeatedly coat and dry the surface of the boron nitride fiber, the number of cycles is 13 times, and obtain the boron nitride fiber coated with graphene oxide on the surface . The thickness of the graphene oxide layer is 3 μm;

[0035] (2) placing the graphene oxide-coated boron nitride fiber obtained in step (1) in water for surface swelling, and then overlapping the fibers with each other and drying to form a non-woven fabric at a drying temperature lower than 100°C.

[0036] (3) The graphene oxide crosslinked boron nitride fiber obtained in step (2) was placed in a closed kettle containing hydrazine hydrate, and reduced at 80° C. for 12 hours.

[0037] Through the above steps, the graphene is coated on the surface of the boron nitride fiber, and the surface of the boron nitride fiber and the graphene sheet are connected by van der Waals force and hydrogen bond. The boron nitride fibers are cross-lin...

Embodiment 3

[0039] (1) The surface of the boron nitride fiber was repeatedly coated and dried by using the ethanol dispersion of graphene oxide, and the number of cycles was 16 times to obtain a boron nitride fiber coated with graphene oxide on the surface. The thickness of the graphene oxide layer is 3 μm;

[0040] (2) The boron nitride fiber coated with graphene oxide obtained in step (3) is placed in water for surface swelling, and then the fibers are overlapped and dried to form a non-woven fabric, and the drying temperature is lower than 100°C.

[0041] (3) Place the graphene oxide crosslinked boron nitride fiber obtained in step (2) in a closed kettle containing hydroiodic acid, and reduce it at 90° C. for 18 hours.

[0042] Through the above steps, the graphene is coated on the surface of the boron nitride fiber, and the surface of the boron nitride fiber and the graphene sheet are connected by van der Waals force and hydrogen bond. The boron nitride fibers are cross-linked throug...

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Abstract

The invention discloses a graphene / boron nitride fiber composite and a preparation method of the graphene / boron nitride fiber composite, and a boron nitride fiber is crosslinked through the swelling and fusing actions of a graphene oxide coating on the surface of the boron nitride fiber. The graphene oxide serves as a sizing agent and a crosslinking agent, the boron nitride fiber is evenly coated,the crosslinking process is rapid and simple, and the crosslinking strength is high. A graphene oxide crosslinking layer is transformed into a graphene crosslinking layer through the further reduction, so that the mutual action between the boron nitride fibers is reinforced, the contact resistance between the fibers is reduced, and the boron nitride fiber shows an excellent mechanical property and electric conduction and heat conduction properties, and can be used in a reinforced phase of the composite. The method for crosslinking the boron nitride fiber through the graphene has a huge research value and a broad application prospect.

Description

technical field [0001] The invention belongs to the field of composite fibers, in particular to a graphene-boron nitride fiber composite material and a preparation method thereof. Background technique [0002] As a new type of high-temperature ceramic fiber, boron nitride fiber has unusual comprehensive properties, such as high temperature resistance, chemical corrosion resistance, excellent dielectric properties, and good chemical compatibility with the material interface, and has become a ceramic matrix composite material. One of the best reinforcement materials for radomes, it occupies an indispensable and important position in the fields of aviation, aerospace and missile weapon technology. In China, the preparation method of boron nitride fiber is mainly the inorganic chemical conversion method. Due to the particularity of the preparation process and the characteristics of the material itself, the moisture-proof performance of the boron nitride fiber is poor. Water wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/74
CPCD06M11/74
Inventor 高超陈琛韩燚李拯
Owner HANGZHOU GAOXI TECH CO LTD
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