A kind of method of phenolic resin strengthening Chinese fir wood

A technology for phenolic resin and fir, which is applied in the field of functional improvement and high-value utilization of wood, can solve the problems of affecting resin permeability, low impregnation efficiency, and high equipment requirements, and achieves simplifying impregnation process and improving impregnation efficiency and uniformity. , the effect of low equipment requirements

Active Publication Date: 2020-08-07
XIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing method needs to provide additional pressure, which has the disadvantages of complex process, high equipment requirements, and high energy consumption; and because the resin itself has a certain molecular weight, and there are occluded pits in Chinese fir, which in turn affects the penetration of the resin in the wood, resulting in impregnation efficiency. low, poor uniformity

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  • A kind of method of phenolic resin strengthening Chinese fir wood

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Embodiment 1

[0028] A method for strengthening Chinese fir wood with phenolic resin according to the present invention is a method for strengthening Chinese fir wood by using small molecule synthetic raw materials for synthesizing phenolic resin to in-situ polymerize and in-situ solidify in Chinese fir wood to generate phenolic resin to strengthen Chinese fir wood, specifically comprising the following steps step:

[0029] S1. Pretreatment of Chinese fir wood: Saw Chinese fir wood according to specifications: length×width×height are 10mm×10mm×200mm, and then dry according to the wood drying standard until the moisture content is 12%.

[0030] S2. Preparation of phenolic resin in-situ polymerization reaction liquid: according to the formula, accurately weigh each component of the reaction liquid in parts by weight, mix 94.1 parts of molten phenol, 5.5 parts of resorcinol, and 121.74 parts of mass fraction to 37% Formaldehyde aqueous solution, 4 parts of sodium hydroxide as catalyst a, 12 pa...

Embodiment 2

[0034] A method for strengthening Chinese fir wood with phenolic resin according to the present invention is a method for strengthening Chinese fir wood by using small molecule synthetic raw materials for synthesizing phenolic resin to in-situ polymerize and in-situ solidify in Chinese fir wood to generate phenolic resin to strengthen Chinese fir wood, specifically comprising the following steps step:

[0035] S1. Pretreatment of Chinese fir wood: Saw Chinese fir wood according to specifications: length×width×height are 20mm×20mm×400mm, and then dry according to the wood drying standard until the moisture content is 10%.

[0036] S2. Preparation of phenolic resin in-situ polymerization reaction solution: according to the formula, accurately weigh each component of the reaction solution in parts by weight, and mix 94.1 parts of molten phenol, 11 parts of resorcinol, and 178.55 parts of resorcinol with a mass fraction of 37%. formaldehyde solution, 11.2 parts of potassium hydrox...

Embodiment 3

[0040] A method for strengthening Chinese fir wood with phenolic resin according to the present invention is a method for strengthening Chinese fir wood by using small molecule synthetic raw materials for synthesizing phenolic resin to in-situ polymerize and in-situ solidify in Chinese fir wood to generate phenolic resin to strengthen Chinese fir wood, specifically comprising the following steps step:

[0041] S1. Pretreatment of Chinese fir wood: saw Chinese fir wood according to specifications: length×width×height is 40mm×40mm×800mm, then dry according to the wood drying standard until the moisture content is 8%;

[0042] S2. Preparation of phenolic resin in-situ polymerization reaction solution: according to the formula, accurately weigh each component of the reaction solution in parts by weight, and mix 94.1 parts of molten phenol, 16.5 parts of resorcinol, and 202.91 parts of resorcinol with a mass fraction of 37%. Formaldehyde aqueous solution, 12 parts of sodium hydroxi...

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Abstract

The invention discloses a method for intensifying Chinese fir wood through phenolic resin. The method is a method which utilizes small molecule raw materials for synthesizing the phenolic resin to perform in-situ polymerization and in-situ curing integrally in the Chinese fir wood and generate the phenolic resin so as to intensify the Chinese fir wood. The method specifically includes the following steps that S1, pretreatment of the Chinese fir wood is performed; S2, in-situ polymerization reaction liquid of the phenolic resin is prepared; S3, the in-situ polymerization reaction liquid of thephenolic resin is dipped into the Chinese fir wood; and S4, an in-situ polymerization and curing reaction of the in-situ polymerization reaction liquid of the phenolic resin is performed, and the Chinese fir wood intensified through the phenolic resin is obtained. The method for intensifying the Chinese fir wood through the phenolic resin achieves integration of polymerization and curing of a modifying agent in the Chinese fir wood, the dipping effect and the uniformity degree of the modifying agent in the wood are remarkably improved, the intensifying modification process of the Chinese fir wood is simplified, and the intensified Chinese fir wood obtained due to modification has good mechanics performance.

Description

technical field [0001] The invention relates to the technical field of wood functional improvement and high-value utilization, in particular to a method for strengthening fir wood with phenolic resin. Background technique [0002] Plantation timber is the main raw material of my country's timber industry. The high-efficiency and high-quality utilization of plantation timber is of great significance to solve the problems of shortage of timber resources and high dependence on imports in my country. Chinese fir is one of the important fast-growing forest tree species in the south. According to the statistics of the State Forestry Administration, the area of ​​Chinese fir forest accounts for about 1 / 4 of the national artificial forest area, accounting for 1 / 2 of the southern artificial forest area, and 1 / 4 of the national commercial forest is Chinese fir . It can be clearly seen from the above data that Chinese fir occupies a very important position in terms of wood processing,...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B27K3/08B27K3/36
CPCB27K3/08B27K3/36
Inventor李萍左迎峰吴义强吕建雄赵星屠茹茹
OwnerXIANGNAN UNIV