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A magnetically responsive wood/fe 3 o 4 Preparation method of composite material

A composite material, magnetic response technology, applied in the direction of wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of long preparation period, complicated process, poor bonding between magnetic substances and wood matrix, etc. Easy-to-operate effects

Inactive Publication Date: 2016-08-31
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of the existing magnetic response wood preparation process complex, long preparation cycle and poor combination of magnetic substances and wood substrates, and to provide a magnetic response wood / Fe 3 o 4 Preparation method of composite material

Method used

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  • A magnetically responsive wood/fe <sub>3</sub> o <sub>4</sub> Preparation method of composite material
  • A magnetically responsive wood/fe <sub>3</sub> o <sub>4</sub> Preparation method of composite material
  • A magnetically responsive wood/fe <sub>3</sub> o <sub>4</sub> Preparation method of composite material

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specific Embodiment approach 1

[0030] Specific implementation mode 1: This implementation mode is a magnetic response wood / Fe 3 o 4 The preparation method of the composite material is specifically completed according to the following steps:

[0031] 1. Ultrasonic treatment: ultrasonically treat the wood substrate in distilled water, ethanol and acetone for 20-25 minutes respectively, and then dry it naturally at room temperature for 24-48 hours to obtain the wood substrate after ultrasonic treatment;

[0032] 2. Carry out chitosan modification: immerse the wood substrate after ultrasonic treatment in 0.2%~1.0% chitosan solution for 10min~30min, dry at 30℃~40℃ for 5min~15min to obtain chitosan modification After the wood substrate;

[0033] The surface area of ​​the wooden substrate described in step 2 and the volume ratio of the chitosan solution of 0.2%~1.0% are (0.1cm 2 ~1.0cm 2 ): 1mL;

[0034] 3. Loading iron salt solution: immerse the chitosan-modified wood substrate into the iron salt solution fo...

specific Embodiment approach 2

[0046] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the solvent in the 0.2%-1.0% chitosan solution described in step 2 is 0.5wt%-2.5wt% acetic acid. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0047] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the iron salt solution described in step three is FeCl 2 solution and FeCl 3 The mixed liquor of the solution; FeCl in the described iron salt solution 2 The concentration of the solution is 0.0375mol / L~0.9mol / L, FeCl in the iron salt solution 3 The concentration of the solution is 0.0625mol / L-1.5mol / L. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a magnetic-response wood / Fe3O4 composite material, and relates to a method for in-situ growth of Fe3O4 on the surface of wood. The invention aims to solve the defects that conventional magnetic-response wood preparation is complicated in process, long in preparation cycle and poor combination of a magnetic material with a wood substrate. The preparation method comprises the steps: one, carrying out ultrasonic treatment; two, carrying out chitosan modification; three, loading with a ferric salt solution; four, dipping into an aqueous solution of ammonia; and five, drying to obtain the magnetic-response wood / Fe3O4 composite material. The obtained magnetic-response wood / Fe3O4 composite material has the magnetic moment of 14.065 memu-57.460 memu; a specific magnetic 'identity' can be endowed to each kind of wood, and an anti-counterfeit label is pasted on the wood. Provided is the preparation method which can obtain the magnetic-response wood / Fe3O4 composite material.

Description

technical field [0001] The invention relates to a method for in-situ growth of Fe on the surface of wood 3 o 4 Methods. Background technique [0002] With the development of science and technology, the compounding of inorganic nanoparticles and wood has become the focus and hotspot in the field of material science research, especially in the improvement of wood strength, high-efficiency antibacterial wood, flame-retardant wood, and electromagnetic shielding wood. In order to enrich the functional improvement of wood and further improve the high value-added utilization of wood, it is the key research aspect of wood improvement today to exert special functions such as "response" and "intelligence". [0003] The existing technology for preparing magnetic wood has problems such as complex process, long cycle time, poor combination of magnetic substance and wood matrix, and the like. Contents of the invention [0004] The purpose of the present invention is to solve the shor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27M1/08B27K3/02B27K3/36B27K3/26B27K5/00B27K5/04
CPCB27K3/02B27K3/16B27K3/26B27K3/36B27K5/00B27K5/04
Inventor 李坚惠彬李国梁韩光辉李莹莹
Owner NORTHEAST FORESTRY UNIVERSITY
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