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Method for preparing polymerizable wood modifier having polar long ether chain and two terminal alkenyls

A double-terminal alkenyl and modifier technology, which is applied in the field of wood modifier preparation, can solve the problems of high price, weak interfacial interaction between polymer and wood matrix, toxicity of wood modifier, etc., to maintain natural Effects of texture, strong interaction, and easy preparation

Inactive Publication Date: 2011-07-20
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problems that the wood modifier prepared by the existing method is toxic, expensive, and the interface interaction between the formed polymer and the wood matrix is ​​weak, and provides a kind of compound containing polar long ether chain and double-terminal alkenyl The preparation method of polymerizable wood modifier

Method used

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  • Method for preparing polymerizable wood modifier having polar long ether chain and two terminal alkenyls
  • Method for preparing polymerizable wood modifier having polar long ether chain and two terminal alkenyls
  • Method for preparing polymerizable wood modifier having polar long ether chain and two terminal alkenyls

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specific Embodiment approach 1

[0012] Specific embodiment one: the preparation method of the polymerizable wood modifier containing polar long ether chain and double-terminal alkenyl in this embodiment is carried out according to the following steps: 1. The organic monomer is passed through the column through alumina to obtain purified Organic monomer; 2. Mix the purified organic monomer and polyethylene glycol in a molar ratio of 2:1 to obtain a mixture, then add toluene and triethylamine, mix well, and pour it into a three-port with stirring device and reflux device 3. Place the three-necked flask with a stirring device and a reflux device in an oil bath at 80-90°C, feed nitrogen gas at the same time, and stir and reflux for 8-10 hours to obtain solution A; 4. Then pour into solution A Add a HCl solution with a concentration of 1 to 2 mol / L until the pH value is neutral, and then perform rotary steaming; 5. Dissolve the product after rotary steaming in ethyl acetate, and wash it with saturated saline for 2...

specific Embodiment approach 2

[0014] Embodiment 2: This embodiment differs from Embodiment 1 in that: the average molecular weight of the polyethylene glycol in step 2 is 400-600 Da. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volume ratio of toluene to the mixture in step 2 is 4-7:1. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a polymerizable wood modifier having a polar long ether chain and two terminal alkenyls, which relates to a method for preparing a wood modifier. The invention aims to solve the technical problem that the wood modifier prepared by the conventional method is toxic and expensive, and the technical problem that the interaction force between the formed polymer and the wood interface is small. The preparation method comprises: 1, preparing a purified organic monomer; 2, mixing the purified organic monomer and polyethylene glycol, and adding methylbenzene and triethylamine; 3, placing the mixture in an oil bath pot, introducing nitrogen and stirring; 4, adding HCl solution till the pH value is 7 and performing rotary evaporation; 5, dissolving the product obtained after rotary evaporation in ethyl acetate, and washing with saturated salt solution; and 6, separating an organic phase by a separating funnel and performing rotary evaporation again to obtain the wood modifier. The wood modifier prepared by the invention is colorless and odorless, the preparation process is simple, the yield is high, and the interaction force between the formed polymer and the wood interface is big. The method is used in the field of wood modification.

Description

technical field [0001] The invention relates to a preparation method of a wood modifier. Background technique [0002] Wood is a natural and renewable biomass composite material. Its natural beautiful texture, unique honeycomb structure and chemical components endow it with a good strength-to-weight ratio, making it a material that humans have relied on for thousands of years. One of the raw materials. However, wood also has its own inherent natural defects, such as easy size deformation, easy decay and degradation, easy thermal degradation, etc., which seriously reduces the use efficiency of wood and poor durability. [0003] In order to improve the inherent defects of wood, researchers have explored the use of various modifiers, such as the use of preservatives to improve the antiseptic performance of wood, flame retardants to improve the fire resistance of wood, and dimensional stabilizers to improve the dimensional stability of wood, etc. However, these wood modifiers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/00B27K3/34
Inventor 李永峰刘一星董晓英
Owner NORTHEAST FORESTRY UNIVERSITY
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