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Silicon carbide polycrystalline shell-core wave-absorbing particles with graphene on surface, and preparation method and application thereof in textile finishing

A technology of graphene and silicon carbide, which is applied in the field of textile materials, can solve problems such as differences in absorbing performance, achieve good absorbing performance, excellent absorbing performance, and prevent secondary reflection pollution

Inactive Publication Date: 2018-08-03
武汉智达纺织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional unidirectional adsorption materials have significant anisotropy, and there are significant differences in the absorbing properties of the electric field perpendicular to and parallel to the fiber direction.

Method used

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  • Silicon carbide polycrystalline shell-core wave-absorbing particles with graphene on surface, and preparation method and application thereof in textile finishing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Fully immerse the graphite paper electrode in 98% concentrated sulfuric acid, and ultrasonically treat it for 5 minutes to obtain a pretreated graphite paper electrode, and perform electrolysis of the pretreated graphite paper electrode at a voltage of 5V in 50% dilute sulfuric acid solution After reacting for 30s, take it out, wash it with water ultrasonically, and disperse it to obtain a 3 mg / mL graphene oxide solution.

[0027] (2) Add polycarbosilane to the graphene oxide solution, fully impregnate it, take it out, and dry it at 60°C to obtain graphene oxide pretreated polycarbosilane, wherein the graphene oxide pretreated polycarbosilane The content of graphene oxide is 0.01%.

[0028] (3) Put the polycarbosilane pretreated by graphene oxide in a horizontal tube furnace, first raise the temperature to 500°C at a rate of 10°C / min, keep it warm for 1h, and then raise the temperature to 1000°C at a rate of 5°C / min, Keep it warm for 30 minutes, then raise the temp...

Embodiment 2

[0031] (1) Fully immerse the graphite paper electrode in 98% concentrated sulfuric acid, and ultrasonically treat it for 10 minutes to obtain a pretreated graphite paper electrode, and perform electrolysis of the pretreated graphite paper electrode in 60% dilute sulfuric acid solution at a voltage of 8V After reacting for 90s, take it out, wash it with water ultrasonically, and disperse to obtain a 5mg / mL graphene oxide solution.

[0032] (2) Add polycarbosilane to the graphene oxide solution, fully impregnate it, take it out, and dry it at 90°C to obtain graphene oxide pretreated polycarbosilane, wherein the graphene oxide pretreated polycarbosilane The content of graphene oxide is 0.1%.

[0033] (3) Put the polycarbosilane pretreated by graphene oxide in a horizontal tube furnace, first raise the temperature to 500°C at a rate of 10°C / min, keep it warm for 1h, and then raise the temperature to 1000°C at a rate of 5°C / min, Keep it warm for 30 minutes, then raise the temperat...

Embodiment 3

[0036] (1) Fully immerse the graphite paper electrode in 98% concentrated sulfuric acid, and ultrasonically treat it for 6 minutes to obtain a pretreated graphite paper electrode, and perform electrolysis of the pretreated graphite paper electrode at a voltage of 6V in 55% dilute sulfuric acid solution After reacting for 60s, take it out, wash it with water ultrasonically, and disperse it to obtain a 4 mg / mL graphene oxide solution.

[0037] (2) Add polycarbosilane to the graphene oxide solution, fully impregnate it, take it out, and dry it at 80°C to obtain graphene oxide pretreated polycarbosilane, wherein the graphene oxide pretreated polycarbosilane The content of graphene oxide is 0.05%.

[0038] (3) Put the polycarbosilane pretreated by graphene oxide in a horizontal tube furnace, first raise the temperature to 500°C at a rate of 10°C / min, keep it warm for 1h, and then raise the temperature to 1000°C at a rate of 5°C / min, Keep it warm for 30 minutes, then raise the temp...

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Abstract

The invention provides silicon carbide polycrystalline shell-core wave-absorbing particles with graphene on the surface, and a preparation method and an application thereof in textile finishing. The particular preparation method comprises the steps: fully immersing a graphite paper electrode in concentrated sulfuric acid, and carrying out ultrasonic treatment to obtain a pretreated graphite paperelectrode; carrying out an electro-hydrolysis reaction of the pretreated graphite paper electrode in a dilute sulfuric acid solution with the voltage of 5-8 V, taking out the graphite paper electrode,carrying out ultrasonic wave washing of the graphite paper electrode with water, and dispersing to obtain a graphene oxide solution; adding polycarbosilane into the graphene oxide solution, then fully impregnating, taking out the product, drying, and thus obtaining graphene oxide pretreated polycarbosilane; and placing the graphene oxide pretreated polycarbosilane in a horizontal tubular furnace,carrying out heat treatment at the temperature of 1250-1400 DEG C, and thus obtaining the silicon carbide polycrystalline shell-core wave-absorbing particles with graphene on the surface. The siliconcarbide polycrystalline shell-core wave-absorbing particles with graphene on the surface are mixed with auxiliary agents to form a wave-absorbing textile finishing solution, and the wave-absorbing textile finishing solution is adhered to the surface of textile base cloth to form a wave-absorbing coating layer by a coating, impregnation or spraying process.

Description

technical field [0001] The invention belongs to the technical field of textile materials, and in particular relates to a silicon carbide polycrystalline shell-core wave-absorbing particle whose surface is graphene, a preparation method thereof, and an application in textile finishing. Background technique [0002] In recent years, with the development of science and technology, a large number of electronic devices have entered daily life, and electromagnetic radiation pollution has become increasingly serious. The deteriorating electromagnetic environment will not only interfere with the normal operation of electronic instruments and equipment, but also affect human health. Microwave absorbing material, also known as microwave absorbing, refers to a type of electromagnetic function that effectively absorbs incident electromagnetic waves, converts electromagnetic energy into heat energy and consumes it, or makes electromagnetic waves interfere and cancel, thereby significantly...

Claims

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Application Information

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IPC IPC(8): D06M11/77D06M11/74C01B32/977C01B32/184
CPCC01B32/184C01B32/977C01P2004/80D06M11/74D06M11/77
Inventor 陈东进
Owner 武汉智达纺织科技有限公司
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