Unlock instant, AI-driven research and patent intelligence for your innovation.

High strength flame-retardant composite wood containing CaCO3/Mg(OH)2 and preparation method thereof

A fire-retardant composite, high-strength technology, applied in wood treatment, impregnated wood, wood impregnation, etc., can solve the problems of poor mechanical properties, soft material, easy to burn, etc., to improve mechanical properties and flame retardant properties, and the preparation process is simple. , the effect of expanding the scope of application

Inactive Publication Date: 2016-05-04
ANHUI AGRICULTURAL UNIVERSITY
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention generates calcium carbonate and magnesium hydroxide in the internal space of wood by a hydrothermal method to prepare calcium carbonate / magnesium hydroxide / wood composite material, which can solve the disadvantages of soft material, poor mechanical properties and easy combustion of fast-growing forest wood

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High strength flame-retardant composite wood containing CaCO3/Mg(OH)2 and preparation method thereof
  • High strength flame-retardant composite wood containing CaCO3/Mg(OH)2 and preparation method thereof
  • High strength flame-retardant composite wood containing CaCO3/Mg(OH)2 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1CaCO 3 / Mg(OH) 2 / Preparation of wood composites:

[0034] (1) Wood is extracted with benzene alcohol, and it is stand-by after vacuum drying;

[0035] (2) Preparation containing 0.3mol·L -1 Ca(Ac) 2 , 0.6mol·L -1 CO(NH 2 ) 2 and 0.3mol·L -1 Mg(NO 3 ) 2 solution as a precursor;

[0036] (3) immerse the wood in step (1) into the precursor solution prepared in step (2) for 6-8h in a vacuum decompression system, so that the precursor solution is injected into the wood matrix;

[0037] (4) Pour the impregnated wood block and the remaining precursor solution in the step (3) into a stainless steel (inner cup is polytetrafluoroethylene) autoclave, the volume is not more than 75% of the volume of the autoclave, and put it into an oven for heating , from the ambient temperature to 90-120 ° C, keep for 6-12 hours, after the heating is completed, cut off the power to let the oven cool down naturally, and take out the wood after cooling to room temperature;

...

Embodiment 2

[0039] The performance test of embodiment 2 composite wood

[0040] For the prepared CaCO 3 / Mg(OH) 2 / Testing and testing of wood composite materials, including optical microscope to observe the internal structure of wood, use X-ray diffractometer (XRD) to measure the composition of wood, and adopt mechanical testing machine to measure material (untreated wood), the composite of the present invention The compressive strength and elastic modulus of wood, the test method: use sandpaper to grind the surface of the wooden block test block to remove the surface deposits, put it into the center of the spherical movable support of the WDW microcomputer-controlled universal mechanical testing machine (Changchun Testing Machine Factory), Uniform pressure is applied to destroy the sample within 2 minutes, and the axial compressive strength, elastic modulus and proportional limit of the wood block are tested.

[0041] The results showed that under the optical microscope, the internal ...

Embodiment 3

[0044] Combustion performance analysis of embodiment 3 composite wood

[0045] Heat release rate (HRR) refers to the rate at which a material releases heat per unit area. HRR can be used as the risk index of materials encountering fire, and its peak value (pk-HRR) is an important parameter for judging the scale, development and fire extinguishing conditions of fire; The sum of the heat released; the total smoke release (TSP) indicates the total amount of smoke produced by the sample during combustion or cracking.

[0046] In this example, the heat release rate (HRR), total heat release (THR) and (total smoke release) of the composite wood of the present invention and the material (untreated wood) were respectively measured.

[0047] Experimental results: if Figure 4 As shown, the heat release rate (HRR) of the composite material decreases, and the peak heat release rate (135kW / m 2 ) than material (190kW / m 2 ) was reduced by about 41%, indicating that the flame retardancy ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
elastic modulusaaaaaaaaaa
elastic modulusaaaaaaaaaa
elastic modulusaaaaaaaaaa
Login to View More

Abstract

The invention relates to a high strength flame-retardant composite wood containing CaCO3 / Mg(OH)2 and a preparation method thereof. The preparation method comprises the following steps: subjecting woods to benzene-alcohol extraction, drying woods in vacuum, saving wood for later use; preparing a precursor solution; and impregnating the precursor solution into the woods in a vacuum decompression system. After tests, people find that the provided preparation method improves the mechanical properties and flame retardant performance of the fast growing woods, and enlarges the application range of fast growing woods. The processed low class woods will have a similar performance of high class woods. At the same time, no adverse effect is generated on the original inner structure of woods. The composite material is prepared through a hydrothermal method, and the preparation technology is simple.

Description

technical field [0001] The invention relates to the field of composite material production, in particular to a CaCO-containing 3 / Mg(OH) 2 High-strength flame-retardant composite wood and its preparation method and application. Background technique [0002] At present, my country's non-renewable resources are increasingly depleted and the environment is overwhelmed. In order to ensure sustainable development, renewable and non-polluting biomass resources and biomass materials should be fully utilized. Wood is the most typical biomass material in nature, and it is widely used in construction, decoration and furniture manufacturing. However, at present, my country's high-quality wood resources are seriously lacking, and the import of high-quality wood exceeds 40% of consumption, and there is a large supply in the wood market. gap. The area of ​​fast-growing forests in my country has exceeded 0.53 hectares, ranking first in the world. However, the shortcomings of fast-growing...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/02B27K3/52
CPCB27K3/02B27K3/08B27K3/52B27K2240/30
Inventor 姚晓林孙金华王青松黄勇同黎昌海
Owner ANHUI AGRICULTURAL UNIVERSITY