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Method for preparing ultraviolet-aging-resistant functional type wood through physical vapor deposition method

A physical vapor deposition and UV-resistant technology, which is applied in wood treatment, vapor phase impregnation, impregnated wood, etc., can solve problems such as difficult construction, achieve low cost, prolong service life, and simple preparation process

Active Publication Date: 2019-02-01
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this method almost needs to be carried out at a high temperature of several hundred degrees Celsius, it is difficult to be used in the construction of coating structures on wood surfaces.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Put the poplar wood specimen (30mm×30mm×5mm in length, width, and thickness) into an ultrasonic cleaning machine, ultrasonically clean the surface for 8-10 minutes, and dry the cleaned poplar wood specimen in a drying oven at 103°C until it is absolutely dry ,spare. Weigh a certain amount of melamine powder, spread it evenly in a quartz boat, place the quartz boat in the high temperature zone of an open-type tubular resistance furnace, and place the poplar wood specimen in the deposition zone of the tube furnace. Continuously feed nitrogen into the tube furnace at a certain flow rate until all the air in the quartz tube is exhausted. Heat the tube furnace from room temperature to 550-600°C at a heating rate of 5-10°C / min, and keep it warm for 20-30min. Slowly feed nitrogen gas into the tube furnace at a flow rate of 100-800 mL / min, stop the gas feeding for 10-40 seconds, and let stand for several minutes. Repeat the above deposition operation 3 times to obtain the sur...

example 2

[0020] Put the poplar wood specimen (30mm×30mm×5mm in length, width, and thickness) into an ultrasonic cleaning machine, ultrasonically clean the surface for 8-10 minutes, and dry the cleaned poplar wood specimen in a drying oven at 103°C until it is absolutely dry ,spare. Weigh a certain amount of urea drug granules, spread them evenly in a quartz boat, place the quartz boat in the high temperature zone of an open-type tubular resistance furnace, and place the poplar wood specimen in the deposition zone of the tube furnace. Continuously feed nitrogen into the tube furnace at a certain flow rate until all the air in the quartz tube is exhausted. Heat the tube furnace from room temperature to 500-550°C at a heating rate of 5-10°C / min, and keep it warm for 20-30min. Slowly feed nitrogen gas into the tube furnace at a flow rate of 100-800 mL / min, stop the gas feeding after 10-40 seconds, and let stand for several minutes. Repeat the above deposition operation 5 times to get the...

example 3

[0022] Load the prepared surface with g-C 3 N 4 The ultraviolet aging-resistant functional wood is placed in the LZW-050A ultraviolet aging test box produced by Shanghai Yiheng Technology Co., Ltd. for accelerated ultraviolet aging test. The test environment temperature is set at 60°C and the radiation intensity is 0.77W / m 2 , the test time is 15 days. According to the CIELAB color system, the NF333 spectrophotometer produced by Beijing Kameister Company was used to measure the surface color of the wood after the aging test, and the results showed that the surface was loaded with g-C 3 N 4 Compared with the pre-experiment, the overall color difference of the UV-absorbing-coated wood is less than 8%, while the surface overall color difference of the wood without any treatment is as high as 25%.

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Abstract

The invention discloses a method for preparing ultraviolet-aging-resistant functional type wood through a physical vapor deposition method. The method mainly aims at solving the problems that the woodsurface is aged under ultraviolet radiation, and the high-temperature condition of a conventional physical vapor deposition method is not applicable to the construction of a coating structure on thewood surface. The method comprises the steps that firstly, a tube type resistance furnace is refitted, and a high-temperature area and a deposition area are defined through division; a g-C3N4 precursor and the wood are placed in the different areas of the tube type resistance furnace; after air in a quartz tube is exhausted through nitrogen gas, the temperature is raised at the set technological parameters; and after the certain temperature is reached, physical vapor deposition operation is started, and the surface of the wood is uniformly loaded with g-C3N4, so that a protective coating capable of absorbing ultraviolet rays is formed. After an accelerated ultraviolet aging test lasting for 15 days is completed, compared with the condition before treatment, the total color difference of the product is less than 8% which is far less than the value, namely 25%, of wood which is not subjected to modification treatment; and the surface of the wood is well protected. The method has the advantages of being simple in preparation technological process, low in raw material cost, environmentally friendly and the like.

Description

technical field [0001] The invention relates to a preparation method of ultraviolet aging-resistant functional wood. Background technique [0002] As a natural, renewable and environmentally friendly organic polymer material, wood has been widely used in interior decoration and construction because of its good processing performance and natural texture structure with aesthetic characteristics. However, due to the degradation of lignin in the main component of wood under ultraviolet radiation, the color of the wood surface will change, and further under the action of rainwater, wind erosion, etc., the wood surface structure will become loose and porous, and the mechanical strength will decrease, seriously shortening the lifespan of the wood. [0003] Photocatalyst is a general term for a class of chemical substances that can play a catalytic role under the excitation of photons. Among them, photocatalysts that can absorb electromagnetic waves in the ultraviolet range are al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/02B27K5/00B27K3/16
CPCB27K3/0271B27K3/16B27K5/0065
Inventor 郭明辉袁炳楠张坤
Owner NORTHEAST FORESTRY UNIVERSITY
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