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Method for preparing poplar fiber /Al2O3 nano composite material

A nano-composite material and poplar fiber technology, which is applied in the field of poplar fiber/Al2O3 nanocomposite material preparation to achieve the effect of solving poor dimensional stability

Inactive Publication Date: 2010-06-23
NANJING FORESTRY UNIV
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  • Abstract
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Problems solved by technology

But wood fiber sol-gel modification has not been reported

Method used

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  • Method for preparing poplar fiber /Al2O3 nano composite material
  • Method for preparing poplar fiber /Al2O3 nano composite material
  • Method for preparing poplar fiber /Al2O3 nano composite material

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Experimental program
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Embodiment Construction

[0025] The test piece was cut from the prepared composite material, with a size of 10cm×10cm×6mm, and the CONE experiment was carried out on it with a cone calorimeter from FireTesting Technology in the UK; in order to make the experimental temperature close to the actual fire temperature, the thermal radiation power of 50kW was used in this experiment .m -2 ;In order to reduce the influence of the outside world, wrap all the surfaces of the sample except the heating surface with aluminum foil, put them in the stainless steel sample holder, and use heat-insulating cotton to block the heat transferred from the back of the sample to the outside.

[0026] Heat release rate HRR. Blank fiberboard with poplar fiber / Al 2 o 3 The HRR-t curve of inorganic nanocomposites is shown in figure 1 . Blank fiberboard and poplar fiber / inorganic nano-Al 2 o 3 The heat release characteristic values ​​of the composite materials are shown in Table 2.

[0027] Table 2 The heat release charact...

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Abstract

The invention relates to a method for preparing a poplar fiber / Al2O3 nano composite material. The poplar fiber / Al2O3 nano composite material is prepared by a sol-gel technique, and the heat release rate, the total heat release amount, the ignition time and the like are researched by utilizing a cone calorimeter. Experimental results show that after the nano composite material is modified by inorganic nano Al2O3, heat release peak values generated at 45s and 175s are obviously weakened, the heat release speed is obviously reduced, the average heat release speed is reduced by 38 percent, the heat release speed peak value drops by 25 percent, the total heat release is reduced by 38 percent, and the ignition time is prolonged by one time. The fire resistance of the poplar fiber / Al2O3 nano composite material is obviously improved.

Description

technical field [0001] What the present invention relates to is a kind of poplar fiber / Al 2 o 3 Nanocomposite preparation method, belonging to poplar wood fiber / Al 2 o 3 field of nanocomposite technology. Background technique [0002] Plant fiber is a kind of hydrophilic material, and the wood composite material made of plant fiber without waterproof treatment has great hygroscopicity and water absorption, and the dimensional stability of the product is poor. After the board absorbs water, it will deform, reduce its strength, increase heat transfer and electrical conductivity, and it is easy to decay, which affects the use range and service life of the material. In addition, wood is a flammable material, and wood composites made of it also have this fatal flaw, which limits the scope of use of wood composites. So far, many researchers in the wood industry have done a lot of research work on the modification of wood composite materials, in order to improve the dimensiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/12B27N3/18B27N7/00
Inventor 徐莉周晓燕姜维娜杨星
Owner NANJING FORESTRY UNIV
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