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Method for preparing magnetic timber

A technology for magnetic wood and wood, which is applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of complex process, high cost, poor magnetic uniformity of magnetic wood, etc., and achieves simple operation, low cost, and magnetic uniformity. good effect

Inactive Publication Date: 2008-05-21
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reported preparation methods have high cost and complicated process, and the magnetic uniformity of magnetic wood is not good.

Method used

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  • Method for preparing magnetic timber
  • Method for preparing magnetic timber

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Weigh FeCl proportionally 3 and FeCl 2 Formulated as Fe 3+ and Fe 2+ The mixed iron salt solution, the total concentration of iron ions is 0.12mol / L, Fe 3+ : Fe 2+ The molar ratio of the solution is 1.2:1.0. After completely dissolving, the washed and dried Chinese fir sawdust is immersed in the solution. The immersion temperature is 30°C, the immersion pressure is 0.1MPa, and the immersion time is 3 hours. After taking out the pre-impregnated sawdust, dip it into 0.6mol / L ammonia solution for 3 hours for hydrolysis, the hydrolysis temperature is 25°C, and the hydrolysis pressure is 0.1MPa. is 0.01MPa, and the time is 12 hours, that is, the compounded Fe 3 o 4 composite sawdust.

Embodiment 2

[0019] Weigh Fe2(SO 4 ) 3 and FeSO 4 Formulated as Fe 3+ and Fe 2+ The mixed iron salt solution, the total concentration of iron ions is 1.0mol / L, Fe 3+ : Fe 2+ The molar ratio is 1.5:1.0. After completely dissolving, the washed and dried cedar wood pieces are immersed in the solution. The immersion temperature is 50°C, the immersion pressure is 1.0MPa, and the immersion time is 24 hours. After taking out the pre-impregnated wood block, dip it into 2.0mol / L ammonia solution for 24 hours and hydrolyze it for 24 hours, the hydrolysis temperature is 35°C, and the hydrolysis pressure is 0.5MPa. After taking it out, put the block into the drying device for drying, and the drying temperature is 100°C , the pressure is 0.1MPa, and the time is 10 hours, that is, the compounded Fe 3 o 4 Composite Lumber.

Embodiment 3

[0021] Weigh Fe(NO 3 ) 3 and Fe(NO 3 ) 2 Formulated as Fe 3+ and Fe 2+ The mixed iron salt solution, the total concentration of iron ions is 2.0mol / L, Fe 3+ : Fe 2+ The molar ratio is 1.8:1.0. After completely dissolving, the washed and dried red oak chips are immersed in the solution. The immersion temperature is 60°C, the immersion pressure is 1.5MPa, and the immersion time is 5 hours. After taking out the pre-impregnated wood block, dip it into 4.0mol / L ammonia solution for 5 hours for hydrolysis, the hydrolysis temperature is 30°C, and the hydrolysis pressure is 1.0MPa. After taking it out, put the block into the drying device for drying, and the drying temperature is 120°C , the pressure is 0.05MPa, and the time is 1 hour, that is, the compounded Fe 3 o 4 composite sawdust.

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Abstract

The invention provides a preparation method of a magnetic wood, which is characterized in that magnetic material Fe3O4 is synthesized to holes of the wood by using an in-situ chemical synthesize method of pretreatment, dipping with ferric salt solution, hydrolysis and drying to prepare the synthesized magnetic wood with better magnetic performance. The preparation method of the invention has simple operation and low cost and the magnetic wood prepared by the method show good physical and chemical performance, thereby having wider application scope, for example, being used for absorption and screening of electromagnetic wave, etc.

Description

Technical field: [0001] The invention relates to a preparation method of magnetic wood with unique structure and good performance. The composite magnetic material can be used in the fields of wave absorption, electromagnetic shielding, special decoration, electronic packaging and the like. Background technique: [0002] With the continuous development of science and technology, the compounding of wood has become a hot spot in the field of materials science research. The inorganic compound modification technology of wood has also made great progress in improving wood strength, humidity sensitivity, and heat resistance. Expanding the field of wood functional modification and endowing wood with new functionality is an effective way to further increase the added value of wood. [0003] Magnetic wood is a composite material that combines wood and magnetic functional properties by adding magnetic materials to wood. In addition to magnetic properties, the material also exhibits p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/04B27K3/26B27K3/32
Inventor 吴国元高洪林
Owner YUNNAN UNIV
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