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Preparing method for environment-friendly resin reinforced flame-retardant modified wood

An environmentally friendly resin and wood technology, applied in wood treatment, humidity control wood, impregnated wood, etc., can solve problems such as poor environmental protection, environmental and human health hazards, and achieve excellent performance, improved physical and mechanical properties, and strong loss resistance. Effect

Inactive Publication Date: 2018-01-19
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, aldehyde-based resin modifiers are poor in environmental protection, and there are problems with the release of harmful substances such as free formaldehyde and phenols, which are harmful to the environment and human health.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] A preparation method based on environmental protection resin reinforcement, fire-retardant modified wood, comprising the following steps:

[0030] (1) Constant temperature and humidity treatment of wood: Place the plantation poplar or fir samples in a constant temperature and humidity box at a temperature of 20°C and a humidity of 65%, and perform humidity control treatment until the moisture content of the wood is 9-11%. .

[0031] (2) Modification solution preparation: Weigh 20% to 40% furfuryl alcohol, 1% to 7% ammonium dihydrogen phosphate (flame retardant), 1% to 5% maleic anhydride (catalyst), 10% ethanol and 38% to 68% distilled water.

[0032] Preheat distilled water to 30-40°C with a magnetic stirrer, then add maleic anhydride and ammonium dihydrogen phosphate in turn, mix well, wait until the solution drops to room temperature 20°C, then add furfuryl alcohol and absolute ethanol, stir for 30-60 Minutes, furfuryl alcohol ammonium dihydrogen phosphate enhanced...

Embodiment 1

[0049] First, preheat 53ml of distilled water to 40°C, then dissolve 2g of maleic anhydride and 5g of ammonium dihydrogen phosphate in it successively, and mix evenly; when the solution drops to room temperature, slowly add 30g of furfuryl alcohol and 10g of ethanol, and stir magnetically for 30min to obtain modifier fluid.

[0050] Process the Italian I-214 poplar wood into a sample with a size of 20mm × 20mm × 300mm, dry it to a moisture content of about 10%, place the wood sample neatly in the impregnation treatment tank, and immerse it in the above-mentioned modification solution , first evacuate to 0.08MPa, keep the vacuum for 30min, release the vacuum, pressurize to 1MPa, and keep the pressure for 3h. Release the pressure, take out the test piece, and dry the surface with absorbent paper. Wrap the sample with aluminum foil, place it in a vacuum drying oven at 103°C for 3 hours, and remove the aluminum foil after the furfuryl alcohol resin is cured. After the sample was...

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PUM

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Abstract

The invention relates to a wood preparing method based on environment-friendly resin reinforcement and flame-retardance modifying. The method comprises the following steps: furfuryl alcohol, maleic anhydride (catalysts), ethanol and ammonium dihydrogen phosphate (flame retardants) ) are used as raw materials, the raw materials are used to prepare an organic-inorganic composite wood modified solution according to a certain ratio; the modified solution is used for carrying out dipping treatment on artificial forest wood, and furfuryl alcohol resin and ammonium dihydrogen phosphate are fixed inside the wood through the solidifying and drying treatment, and the modified wood is finally obtained. According to the method, the dimensional stability, the density, the bending-resistant elasticity modulus and the anti-wrinkle compressive strength of the wood can be improved, the flame retardant is not prone to run off, the loss resistance is high, and the method is green and environment-friendly; and meanwhile, the wood is endowed with good flame-retardancy and dimensional stability, and the method has the advantages of remarkably improving the quality and the additional value of the artificial forest wood.

Description

technical field [0001] The invention belongs to a method for preparing fire-retardant modified wood based on environment-friendly resin reinforcement. Background technique [0002] In recent years, the contradiction between the effective supply of timber resources in my country and the ever-increasing social demand has become increasingly prominent. Under the situation that my country's natural forests are completely banned and the control of imported timber is becoming more and more stringent, the efficient use of my country's abundant plantation timber resources (such as poplar, fir, eucalyptus, masson pine, paulownia, etc.) is the key to alleviating the contradiction between timber supply and demand. fundamental way. However, there are generally problems such as low density, low strength, poor dimensional stability, and poor durability of plantation wood, which greatly restricts its application. Modification of plantation wood to overcome various defects of wood and impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K1/00B27K3/08B27K3/52B27K5/04C08G65/36
Inventor 王小青孔丽琢刘君良柴宇博倪林屠坤坤管浩
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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