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Graphene oxide flame-retardant straw material and preparation method therefor

A technology of graphene and straw, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., to achieve excellent fire and flame retardancy, simple preparation process, and improved flame retardancy

Active Publication Date: 2015-10-21
JILIN JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This study has not been reported at home and abroad

Method used

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Experimental program
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Effect test

Embodiment 1

[0018] 1) Remove the pith part of the straw, use the fiber part of the straw as the main raw material, dry it at 100°C and grind it until the particle size is less than 100 μm to obtain straw powder;

[0019] 2) Ultrasonic dispersion of graphene oxide in deionized water for 3 hours to obtain a graphene oxide aqueous solution with a uniform dispersion concentration of 0.2mg / ml-1.5mg / ml;

[0020] 3) Mix straw powder and graphene oxide aqueous solution at a ratio of 5:100 (g / ml) and then ultrasonically disperse for 10 minutes;

[0021] 4) The composite material was mechanically stirred and evaporated at 90° C. until the mixture was viscous, and then dried at 55° C. for 12 hours to obtain graphene oxide-coated straw powder.

Embodiment 2

[0023] 1) Remove the pith part of the straw, use the fiber part of the straw as the main raw material, dry it at 100°C and grind it until the particle size is less than 100 μm to obtain straw powder;

[0024] 2) Ultrasonic dispersion of graphene oxide in deionized water for 3 hours to obtain a graphene oxide aqueous solution with a uniform dispersion concentration of 0.2mg / ml-1.5mg / ml;

[0025] 3) Mix straw powder and graphene oxide aqueous solution at a ratio of 5:150 (g / ml) and then ultrasonically disperse for 20 minutes;

[0026] 4) The composite material was mechanically stirred and evaporated at 90° C. until the mixture was viscous, and then dried at 55° C. for 12 hours to obtain graphene oxide-coated straw powder.

Embodiment 3

[0028] 1) Remove the pith part of the straw, use the fiber part of the straw as the main raw material, dry it at 100°C and grind it until the particle size is less than 100 μm to obtain straw powder;

[0029] 2) Ultrasonic dispersion of graphene oxide in deionized water for 3 hours to obtain a graphene oxide aqueous solution with a uniform dispersion concentration of 0.2mg / ml-1.5mg / ml;

[0030] 3) Mix straw powder and graphene oxide aqueous solution at a ratio of 5:200 (g / ml) and then ultrasonically disperse for 30 minutes;

[0031] 4) The composite material was mechanically stirred and evaporated at 90° C. until the mixture was viscous, and then dried at 55° C. for 12 hours to obtain graphene oxide-coated straw powder.

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Abstract

The invention provides a graphene oxide flame-retardant straw material and a preparation method therefor. After drying straw fiber, mechanically grinding the straw fiber till the granularity is less than 100 [mu]m; putting graphene oxide in deionized water and carrying out ultrasonic dispersion for 3 hours to obtain a uniform graphene oxide aqueous solution with dispersion concentration of 0.2-1 mg / ml; pouring mechanically ground straw powder into the graphene oxide aqueous solution and carrying out ultrasonic dispersion for 30 minutes; and stirring and evaporating the dispersed mixed system at 90 DEG C till the system is thick and drying the system at 60 DEG C to remove residual water so as to obtain the graphene oxide flame-retardant straw material coated with one or more layers of graphene oxide. The graphene oxide flame-retardant straw material is simple in preparation process and environmental-friendly, provides a novel path for developing application of straws in the field of building materials, and has a broad application prospect.

Description

Technical field: [0001] The invention relates to a graphene oxide flame-retardant straw material and a preparation method thereof, belonging to the technical field of fire-resistant and flame-resistant building materials. Background technique: [0002] my country is a large agricultural country with abundant straw resources, wide distribution, many types and huge output. According to statistics, my country's annual output of crop straw is 700 million tons, ranking first in the world, accounting for about 30% of the world's total straw. According to the survey, the current utilization rate of straw in my country is about 33%, and most of them are not treated, and only about 2.6% are used after technical treatment. The application of straw in the field of building materials is mainly in blocks and plates. However, in the application process, there are problems such as product flammability, poor corrosion resistance, and low added value. Therefore, it is of practical signi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/24C04B20/10
CPCY02W30/91
Inventor 胡洪亮肖力光刘清顺陈光
Owner JILIN JIANZHU UNIVERSITY
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