Method for thermally modifying wood by oil palm oil

A technology of oil palm oil and thermal modification, which is applied in the field of thermally modified wood with oil palm oil, can solve the problem that the flexural strength and impact toughness of thermally modified wood are reduced, the scope of use of thermally modified wood is limited, and it is difficult to tenon It can solve problems such as furniture with a 900-foot structure, and achieve the effect of fast heat transfer, convenient industrial application, and shortened processing cycle.

Active Publication Date: 2011-08-17
RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The use of heat treatment can effectively improve its dimensional stability and corrosion resistance, but the flexural strength and impact toughness of the thermally modified wood are significantly reduced. For example, if it is treated at 200 ° C for 3 hours, the flexural strength of rubber tree wood will lose 30%. The wood becomes brittle, and the mortise and tenon joints are easy to break during the production of wood products. It is only suitable for wood products with panel structure, and it is difficult to use in traditional mortise and tenon structure furniture. Big

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  • Method for thermally modifying wood by oil palm oil

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Effect test

Embodiment 1

[0013] The present invention is further illustrated below with non-limiting examples. Embodiment one: oil palm oil thermally modified rubber wood

[0014] 1) Take rubber wood gauge timber with a moisture content of 20% and a thickness of 3.5 cm, stack it firmly, and put it into a treatment tank.

[0015] 2) Heat the oil palm oil to 180°C, and then inject it into the treatment tank through the valve to continuously supply heat to the oil palm oil and heat the wood.

[0016] 3) After the wood temperature reaches 180°C, increase the oil temperature to increase the wood temperature at a rate of 20°C / h, and when the wood temperature reaches 200°C, maintain for 3 hours to thermally modify the wood.

[0017] 4) Stop the heat supply, immediately discharge the high-temperature palm oil from the treatment tank, inject atomized water to gradually cool the wood to 130°C, wait for it to cool down to room temperature naturally, and the treatment is completed, open the treatment tank, and u...

Embodiment 2

[0018] Embodiment 2 Oil palm oil thermally modified acacia mazhan

[0019] 1) Take acacia timber with a moisture content of 12-15°C and a thickness of 3.0 cm, stack it firmly, and put it into a treatment tank.

[0020] 2) Heat the oil palm oil to 155°C, and then inject it into the treatment tank through the valve to continuously supply heat to the oil palm oil and heat the wood.

[0021] 3) After the wood temperature reaches 180°C, increase the oil temperature to increase the wood temperature at a rate of 15°C / h, and when the wood temperature reaches 200°C, keep the wood for 2 hours for thermal modification.

[0022] Cooling process is identical with embodiment one;

Embodiment 3

[0023] Embodiment three: thermally modified lychee wood with oil palm oil

[0024] 1) Take lychee timber with a moisture content of less than 12% and a thickness of 2.5 cm, stack it firmly, and put it into a treatment tank.

[0025] 2) Heat the oil palm oil to 150°C, and then inject it into the treatment tank through the valve to continuously supply heat to the oil palm oil and heat the wood.

[0026] 3) After the wood temperature reaches 180°C, increase the oil temperature to increase the wood temperature at a rate of 10°C / h. When the wood temperature reaches 200°C, keep the oil for 3 hours for thermal modification.

[0027] Cooling process is identical with embodiment one;

[0028] According to the national standard "GB1936.1-91 Test method for flexural strength of wood", the mechanical properties of rubber wood steam heat-treated and oil palm oil heat-treated materials obtained by testing different treatment temperatures for 3 hours are shown in Table 1. Compared with rubb...

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Abstract

The invention relates to a method for thermally modifying wood by oil palm oil. The method comprises the following steps of: stacking the wood stably, and then placing the wood stack in a treating tank; heating up the oil palm oil and then filling to the treating tank, completely covering the wood by the oil palm oil, heating up the wood, and keeping the temperature for 0.5-3 hours for thermally modifying the wood when the temperature of the wood reaches 200-215 DGE C; and stopping heat supply, then discharging the oil palm oil immediately, filling atomized water into the treating tank to gradually cool the wood, and then naturally cooling the wood to the room temperature (30 DEG C) so as to complete the treatment. The method in the invention is simple in process; the wood is isolated from the air by the oil palm oil; the wood is effectively prevented from oxidation and degradation; the thermal treatment features in fast heating speed, short treating period and low cost; the treated wood features in increased size stability, small bending resistance intensity loss, high corrosion resistance, high intensity, good durability and the like; and the wood is convenient for industrial application, and can be widely used for the indoor and outdoor furniture, landscapes, finishing materials and the like.

Description

technical field [0001] The invention relates to a method for thermally modifying wood with vegetable oil, in particular to a method of using oil palm oil as a heating medium, using vegetable oil to isolate oxygen in the air during the thermal modification of wood, and reducing the oxidative degradation of wood during the thermal modification Compared with the method of thermally modifying wood in steam, it has the characteristics of reducing the loss of wood bending strength and improving the corrosion resistance, and belongs to the field of wood science and technology. Background technique [0002] Thermally modified wood is modified by heat treatment of wood in a high-temperature (usually 160-220°C) low-oxygen environment. During the heat treatment process, the main components of wood, hemicellulose and cellulose, degrade to varying degrees, rearrange lignin macromolecules, and cell wall The hydroxyl group decreases, the moisture absorption performance decreases, and the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/00
Inventor 李家宁林位夫谢贵水李民李晓文秦韶山安锋周立军王纪坤
Owner RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI
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