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Magnesium-aluminum layered double hydroxide/graphene oxide/wood-based composite material as well as preparation method and application thereof

A technology of hydroxide and composite materials, which is applied in the field of wood composite materials, can solve the problems of lack of research on fire early warning, and achieve the effects of preventing fire from spreading, low energy consumption, and prolonging the alarm time

Inactive Publication Date: 2020-06-12
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is still a lack of research on wood fire early warning

Method used

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  • Magnesium-aluminum layered double hydroxide/graphene oxide/wood-based composite material as well as preparation method and application thereof
  • Magnesium-aluminum layered double hydroxide/graphene oxide/wood-based composite material as well as preparation method and application thereof
  • Magnesium-aluminum layered double hydroxide/graphene oxide/wood-based composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step S1: Immerse poplar wood in an aqueous solution containing 0.06 mol / L magnesium nitrate, 0.03 mol / L aluminum nitrate and 0.5 mol / L urea, and react at a low temperature of 120 °C for 24 h under hydrothermal conditions;

[0040] Step S2: The poplar treated in step S1 is vacuum-dried at 50° C. for 12 hours, and the wood modified with magnesium-aluminum double hydroxide can be obtained;

[0041] Step S3: adding 60 mg of graphene oxide to 30 mL of water, and after 1 h of mechanical stirring and 30 min of ultrasonic treatment, a graphene oxide suspension can be obtained;

[0042] Step S4: drop the graphene oxide suspension dropwise on the surface of the wood modified with magnesium-aluminum layered double hydroxide, and then place the wood to dry at 50° C. for 4 hours; repeat the dropping-drying process 3 times The magnesium-aluminum layered double hydroxide / graphene oxide / wood-based composite material is prepared.

Embodiment 2

[0044] Step S1: Immerse poplar wood in an aqueous solution containing 0.06 mol / L magnesium nitrate, 0.03 mol / L aluminum nitrate and 0.5 mol / L urea, and react at a low temperature of 120 °C for 24 h under hydrothermal conditions;

[0045] Step S2: The poplar treated in step S1 is vacuum-dried at 50° C. for 12 hours, and the wood modified with magnesium-aluminum double hydroxide can be obtained.

Embodiment 3

[0047] Step S1: Immerse poplar wood in an aqueous solution containing 0.06 mol / L magnesium nitrate, 0.03 mol / L aluminum nitrate and 0.5 mol / L urea, and react at a low temperature of 120 °C for 24 h under hydrothermal conditions;

[0048] Step S2: The poplar treated in step S1 is vacuum-dried at 50° C. for 12 hours, and the wood modified with magnesium-aluminum double hydroxide can be obtained;

[0049] Step S3: adding 60 mg of graphene oxide to 30 mL of water, and after 1 h of mechanical stirring and 30 min of ultrasonic treatment, a graphene oxide suspension can be obtained;

[0050]Step S4: Add the wood treated in step S2, 60 mg of dopamine hydrochloride, and 36 mg of trimethylolmethylamine to the graphene oxide suspension treated in step S3, stir in a water bath at 60°C for 12 h, and then take out the wood and rinse with clean water After cleaning, it was dried at 50 °C to obtain a magnesium-aluminum layered double hydroxide / graphene oxide / wood-based composite material prep...

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Abstract

The invention belongs to the technical field of wood composite materials, and provides a preparation method of a magnesium-aluminum layered double hydroxide / graphene oxide / wood-based composite material, which comprises the following steps: immersing wood in an aqueous solution containing magnesium salt, aluminum salt and urea, and carrying out a reaction under low-temperature hydrothermal conditions; and carrying out vacuum drying on the wood for 12 h at the temperature of 50 DEG C, thereby preparing the magnesium-aluminum layered double hydroxide modified wood; adding graphene oxide into water, and carrying out mechanical stirring and ultrasonic treatment to obtain a graphene oxide suspension; dropping the graphene oxide suspension on the surface of the wood, drying the wood at 50 DEG C for 3 hours, and repeating the operations for 3-6 times. The composite wood with fire early warning and flame retarding functions is prepared by adopting a low-temperature hydrothermal reaction combined with a dripping method, the process is simple, the energy consumption is low, the material structure is stable, and meanwhile, the synergistic flame retarding effect of graphene oxide and inorganicmetal is realized.

Description

technical field [0001] The invention relates to the technical field of wood composite materials, in particular to a magnesium-aluminum layered double hydroxide / graphene oxide / wood-based composite material and a preparation method and application thereof. Background technique [0002] As an important material that has the closest relationship with human beings and the most harmonious development with the environment, wood has been widely used in all aspects of human life, such as building decoration, indoor and outdoor decoration, furniture manufacturing, packaging materials, etc. However, wood, as a natural organic polymer material, is very easy to burn when exposed to open fire, which greatly limits the application range of wood, especially as a building material in densely populated areas and high-rise buildings. According to statistics from the Ministry of Emergency Management, in 2018, a total of 237,000 fires were reported nationwide, killing 1,407 people and injuring 7...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/02B27K3/12B27K3/52B27K5/04B27K5/00
CPCB27K3/02B27K3/12B27K3/52B27K5/0075B27K5/04B27K2240/30
Inventor 孙庆丰蔡泰龙王喆蓝朱悦姜奕宁
Owner ZHEJIANG FORESTRY UNIVERSITY
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