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Furfuryl alcohol resin gas-phase modification method for wood material

A technology of wood material and furfuryl alcohol resin, which is applied in the functionalization and modification field of wood material, can solve the problems of increasing drying difficulty, increasing drying cost, increasing production cost, etc., so as to avoid the loss of modified solution and reduce drying energy. The effect of reducing consumption and reducing waste of raw materials

Active Publication Date: 2020-04-28
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its main defects: 1) The presence of water significantly increases the drying cost; 2) After furfuryl alcohol is cured, it blocks the passage of water in and out of the wood, which increases the drying energy consumption and degrades the drying quality.
It has the following defects: 1) Furfuryl alcohol is not diluted, although the modification effect is good, but the furfuryl alcohol consumption in the modification process is large, and the cost is high; 2) No stabilizer or co-solvent is added, so that the furfuryl alcohol modified solution is stored And it is easy to pre-polymerize during use, which affects the effective penetration of the modified solution in wood
However, it has the following defects: 1) The loss of furfuryl alcohol modified liquid is serious during the curing process, and the curing rate is low, resulting in material waste and increased production costs; 2) The modified solution enters the interior of the material, and the furfuryl alcohol is cured to block the water in and out Channels of wood and bamboo make drying more difficult

Method used

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  • Furfuryl alcohol resin gas-phase modification method for wood material
  • Furfuryl alcohol resin gas-phase modification method for wood material
  • Furfuryl alcohol resin gas-phase modification method for wood material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This embodiment provides a gas-phase furfuryl alcohol resin modification method for wood materials.

[0030] 1. Modified object: Chinese fir plantation ( Cunninghamia lanceolata ).

[0031] 2. The specific process steps are as follows:

[0032] S1. Sample preparation, the specific steps: a) Process the fir into a 20 mm×20 mm×20 mm (T×R×L) sample and then sand it; b) Dry the sample in an oven at 103°C until it is absolutely dry In dry state, while at 22-25℃, prepare maleic anhydride solution with a concentration of 4.5wt% with water;

[0033] S2. Put the sample in a small vacuum reactor, first vacuum with a vacuum pump for 30 minutes to a vacuum of -0.09 MPa, then use the negative pressure in the reactor to suck in the prepared maleic anhydride solution, and then use industrial nitrogen Pressurize to 1.0 MPa, hold the pressure for 40 minutes;

[0034] S3. Take out the sample and dry it at 60°C for 2 hours, then raise it to 80°C for 2 hours, and then dry it at 103°C for 20 hours...

Embodiment 2

[0051] This embodiment provides a gas-phase furfuryl alcohol resin modification method for wood materials.

[0052] 1. Modification object: plantation poplar ( Populus spp ).

[0053] 2. The specific process steps are as follows:

[0054] S1. Sample preparation, the specific steps: a) Process the poplar wood into a 20 mm×20 mm×20 mm (T×R×L) sample and then sand it; b) Dry the sample in an oven at 103℃ In an absolutely dry state, at the same time, at 22-25℃, prepare a maleic anhydride solution with a concentration of 1.5wt% with water;

[0055] S2. Put the sample in a small vacuum reactor, first vacuum with a vacuum pump for 30 minutes to a vacuum of -0.09 MPa, then use the negative pressure in the reactor to suck in the prepared maleic anhydride solution, and then use industrial nitrogen Pressurize to 1.0 MPa, hold the pressure for 40 minutes;

[0056] S3. Take out the sample and dry it at 60°C for 2h, then raise it to 80°C for 2h, and then dry it at 103°C for 20h;

[0057] S4. Put th...

Embodiment 3

[0067] This embodiment provides a gas-phase furfuryl alcohol resin modification method for wood materials.

[0068] 1. Modification object: plantation poplar ( Populus spp ).

[0069] 2. The specific process steps are as follows:

[0070] S1. Sample preparation, the specific steps: a) Process the poplar wood into a 20 mm×20 mm×20 mm (T×R×L) sample and then sand it; b) Dry the sample in an oven at 103℃ In an absolutely dry state, at the same time, at 22-25℃, prepare a maleic anhydride solution with a concentration of 6.0wt% with water;

[0071] S2. Put the sample in a small vacuum reactor, first vacuum with a vacuum pump for 30 minutes to a vacuum of -0.09 MPa, then use the negative pressure in the reactor to suck in the prepared maleic anhydride solution, and then use industrial nitrogen Pressurize to 1.0 MPa, hold the pressure for 40 minutes;

[0072] S3. Take out the sample and dry it at 60°C for 2h, then raise it to 80°C for 2h, and then dry it at 103°C for 20h;

[0073] S4. Put th...

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Abstract

The invention discloses a furfuryl alcohol resin gas-phase modification method for a wood material. According to the method, a two-step modification process is adopted, that is, an organic weak acid solution is injected into wood, bamboo and other wood materials in a vacuum pressure impregnation mode, then furfuryl alcohol gas is deposited in the cell walls of the wood materials through a vapor deposition method; then heating and curing are conducted, and therefore the performance of the wood materials is improved. The method can significantly improve the furfuryl alcohol curing effect, reducethe raw material loss and reduce the drying difficulty, and has a good application prospect.

Description

Technical field [0001] The invention belongs to the technical field of functionalization and modification of wooden materials, and specifically relates to a two-step method for gas-phase modification of furfuryl alcohol to treat wooden materials such as wood and bamboo. Background technique [0002] Furfuryl alcohol resin modification technology is to make furfuryl alcohol into the wood material through a certain method, and solidify furfuryl alcohol inside the material into furfuryl alcohol resin under the conditions of catalyst and heating. This technology can significantly improve the physical, mechanical and biological durability of wood, bamboo and other wooden materials. [0003] Some methods for modifying furfuryl alcohol resins of wood materials have been proposed in the prior art. For example, patent US 2002 / 0192400A1 uses wood as a modified object in order to improve the dimensional stability and corrosion resistance of wood. The furfuryl alcohol modification solution us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/50B27K5/00
CPCB27K3/50B27K3/08B27K5/00
Inventor 余雁刘明辉王汉坤张雪霞郭飞
Owner FUJIAN AGRI & FORESTRY UNIV
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