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Method for preparing electromagnetic shielding flame-retardant fiberboard

A flame-retardant fiber and electromagnetic shielding technology, which is applied in the field of decorative materials, can solve the problems of lack of electromagnetic shielding effect and poor water resistance, and achieve the effects of improving internal bonding strength, isolating oxygen flame-retardant area, and improving thermal stability

Inactive Publication Date: 2019-01-11
佛山齐安建筑科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is that the current fiberboard has poor water resistance and does not have electromagnetic shielding effect.

Method used

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  • Method for preparing electromagnetic shielding flame-retardant fiberboard

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Embodiment Construction

[0023]Mix rice straw and bean straw with a mass ratio of 1:5, put them into a pulverizer and pulverize them for 4 to 5 hours, pass through a 200-mesh sieve to obtain fiber scraps, take trimethylmethoxysilane with 2% mass of fiber scraps, and use Dissolve trimethylmethoxysilane in acetone to prepare a trimethylmethoxysilane solution with a mass fraction of 5%, mix fiber scraps and burned rice husk ash at a mass ratio of 5:1, and then impregnate Soak in trimethylmethoxysilane solution at room temperature for 4-5 hours, filter, remove the filtrate to obtain modified fiber scraps, and set aside; add 100-120g ammonium polyphosphate, 230-250mL absolute ethanol, 100-200mL distilled water, stir and mix for 20-25min, continue to add ammonia water with a mass fraction of 35% to the beaker to adjust the pH to 10.2-10.4, to obtain retardant fuel, add 20-25g methyl triethoxy to the retardant fuel For silane, heat the beaker in a water bath to 45-60°C, keep it warm for 2-3 hours, filter and...

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Abstract

The invention discloses a method for preparing an electromagnetic shielding flame-retardant fiberboard, which belongs to the technical field of a decoration material. In the invention, silicon gel coated ammonium polyphosphate is used to prepare silicon gel microencapsulated ammonium polyphosphate, an element in the silicon gel microencapsulated ammonium polyphosphate has high thermal stability, and the amount of a flame retardant is reduced. In the process of copolymerization of acrylonitrile and butadiene, due to the existence of active reaction points in the nanographite sheets, the graphite sheet layer is nanodispersed in a rubber matrix under emulsion blending, a certain intercalation structure is existed, the potential active sites on the nanographite sheet are in full contact with the rubber molecules, self-vulcanization is carried out, so that the interference field forms eddy currents in an elastic material, and reflection is generated on the surface of the elastic material, and the shielding effect can be achieved, moreover, the copper powder with high magnetic permeability is added to the nano-reinforced nitrile rubber, the eddy current effect is increased, and the electromagnetic shielding effect is increased.

Description

technical field [0001] The invention discloses a preparation method of an electromagnetic shielding flame-retardant fiberboard, which belongs to the technical field of decorative materials. Background technique [0002] Fiberboard, also known as density board, is a wood-based panel made of wood fiber or other vegetable fiber and applied with urea-formaldehyde resin or other suitable adhesives. Adhesives and or additives may be applied during the manufacturing process. Fiberboard has the advantages of uniform material, small vertical and horizontal strength difference, not easy to crack, etc., and has a wide range of uses. It takes about 2.5-3 cubic meters of wood to make 1 cubic meter of fiberboard, which can replace 3 cubic meters of sawn timber or 5 cubic meters of logs. The development of fiberboard production is an effective way to comprehensively utilize wood resources. [0003] Usually, according to the product density, it can be divided into two categories: non-com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08K9/10C08K3/32C08K9/04C08K3/34C08K3/26C08J7/04C09D109/02C09D5/24
CPCC08J7/0427C08J2397/02C08J2409/02C08K2003/323C08L97/02C08L2205/025C08L2205/16C09D5/24C09D109/02C08K9/10C08K3/32C08K9/04C08K3/346C08K3/26
Inventor 战英权章红英王素香
Owner 佛山齐安建筑科技有限公司
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