Production method of compressed compact carbonized wood

A wood and carbonization technology, which is applied in the direction of pressurized wood treatment, wood treatment, impregnated wood, etc., can solve the problems that the mechanical strength and waterproof dimensional stability of wood cannot be simultaneously improved

Inactive Publication Date: 2017-03-15
SHANDONG AGRICULTURAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that existing wood modification methods cannot simultaneously improve wood mechanical strength and waterproof dimensional stability, and provides a method for preparing compressed and dense carbonized wood

Method used

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  • Production method of compressed compact carbonized wood
  • Production method of compressed compact carbonized wood
  • Production method of compressed compact carbonized wood

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specific Embodiment approach 1

[0035] Specific implementation mode one: the preparation method of compressed and compacted carbonized wood in this embodiment comprises the following steps:

[0036] 1. Wood softening pretreatment:

[0037] Expose the wood to NaOH and Na 2 SO 3 In the mixed aqueous solution, heat treatment at 80-90°C for 5-10h, and then wash the wood with distilled water at room temperature until it is neutral to obtain softened wood;

[0038] 2. Compression treatment of softened wood:

[0039] Put the softened wood in a hot press, compress the wood thickness to 20%-25% of the original under the pressure of 3-5MPa at room temperature, then raise the temperature step by step, first raise the temperature to 60-80°C and keep the pressure for 8-10h, Then continue to heat up to 100-120°C and keep the pressure for 24-48h;

[0040] 3. Wood high temperature carbonization treatment:

[0041] Put the treated wood in step 2 in a high-temperature carbonization box, raise the temperature to 130-150°C...

specific Embodiment approach 2

[0043] Embodiment 2: This embodiment differs from Embodiment 1 in that: the mass concentration of NaOH in the mixed aqueous solution described in step 1 is 1%-5%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0044] Embodiment 3: This embodiment differs from Embodiment 1 in that: the mass concentration of NaOH in the mixed aqueous solution described in step 1 is 2%-4%. Others are the same as in the first embodiment.

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Abstract

A production method of compressed compact carbonized wood relates to wood modification methods and mainly solves the problem that existing wood modification methods cannot improve the mechanical strength and the waterproof dimensional stability of wood. The method comprises, I, wood softening pretreatment including immersing and heating wood in a pretreatment solution and then washing the wood to obtain softened wood, II, softened wood compression, and III, high-temperature wood carbonization. The production method of the compressed compact carbonized wood can solidify compressed deformation of wood, avoid resilience and reinforce cellulose framework structures to strengthen wood. Wood modified through the method obtains obvious enhancement in mechanical strength and dimensional stability. The production method of the compressed compact carbonized wood is applied to wood modification.

Description

technical field [0001] The invention relates to a method for modifying wood. Background technique [0002] Because of its unique composition, wood is easy to absorb water and cause swelling and deformation, and it is easy to be rotten and degraded by mold erosion; it is also low in density and poor in strength due to its loose porous structure, and fast-growing tree species (such as poplar, fir, etc.) This is especially true of density and strength. In order to improve the strength of wood and prolong the service life of wood (to improve its durability such as waterproofing and anti-corrosion), people use a variety of methods to modify wood. In general, it mainly includes the following: one. Wood density is increased, mechanical properties are improved, and durability is partially improved, but this method will cause high brittleness of wood due to polymer filling, and cannot fundamentally prevent moisture from penetrating into wood, so that wood will still absorb water and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/32B27K5/00
CPCB27K3/32B27K5/007B27K5/0085B27K5/065B27K5/001B27M1/02B27M1/06
Inventor 董晓英李永峰
Owner SHANDONG AGRICULTURAL UNIVERSITY
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