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Method for manufacturing benzylation bamboo engineering material

A technology of engineering materials and manufacturing methods, applied in the pretreatment of molding materials, manufacturing tools, wood treatment, etc., can solve problems such as difficult gluing, poor wettability of bamboo green and bamboo yellow, and bamboo has not been industrialized, and achieve high The effect of abrasion resistance and high insect-proof and anti-corrosion properties

Inactive Publication Date: 2009-04-15
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the wettability of general adhesives to bamboo green and bamboo yellow in bamboo is very poor, it is difficult to glue together; therefore the current industrial utilization methods of bamboo all need to remove bamboo green and bamboo yellow, resulting in a great waste of materials
Bamboos with smaller diameters or smaller wall thicknesses have so far not been exploited industrially

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Take the bamboo floor and process the remaining bamboo tips, saw them into bamboo tubes with a length of 2.5m, and split each bamboo tube radially into bamboo strips with a width of no more than 30mm. After the bamboo strips are rolled by a roller press, they are arranged into bundles and placed Dry in a drying kiln until the water content is about 14%, soak the bamboo strips in a caustic soda solution with a concentration of 20%, moisten for 6 hours at room temperature, take out the bamboo strips, drain the soaking solution, and then soak the bamboo strips Put bamboo bundles into the reactor, and add benzyl chloride solution at the same time, so that the bamboo strips are completely soaked in benzyl chloride, and react at 120°C for 3 hours. Take out the bamboo strips, wash them twice alternately with water and industrial ethanol, and then dry them at 103°C for about 4 hours. Then calculate according to the set product size and density and weigh the bamboo strips treate...

Embodiment 2

[0014] Take bamboo strips with a length of 1.3m and a thickness of 0.5-1.0mm, tidy them up and tie them neatly, then dip them in a 15% NaOH solution, add 0.05g of basic orange dye / g of bamboo, and moisten them for 5 hours at room temperature. Take out the bundle of bamboo strips and drain the impregnated lye. Then put the moistened bamboo bundles into the reactor, and add the benzyl chloride solution at the same time, so that the bamboo strips are completely soaked in the benzyl chloride, and react at 125° C. for 2 hours. Take out the bamboo strips, wash them three times alternately with water and industrial ethanol, and then dry them at 103°C for about 4 hours. Then calculate according to the set product size and density and weigh the bamboo strips treated above, form the billets according to the same fiber direction, put them into a two-way hot press, under the conditions of temperature 145°C, frontal pressure 2.5MPa, and lateral pressure 1.0MPa Hot pressing 2min / mm thick. ...

Embodiment 3

[0016] Take the long residues from the processing of bamboo chopsticks, comb them into bundles according to different lengths, and after drying in the open air, soak the bundled bamboo strips in a caustic soda solution with a concentration of 15%, moisten them for 3 hours at room temperature, and take out the bundled bamboo strips , drain the maceration. Then put the moistened bamboo bundles into the reactor, and add the benzyl chloride solution at the same time, so that the bamboo strips are completely immersed in the benzyl chloride, and react at 120° C. for 2 hours. Take out the bamboo strips, wash them three times alternately with water and industrial ethanol, and then dry them at 105°C for about 4 hours. Then calculate according to the set product size and density and weigh the bamboo strips that have been treated above, assemble them in the same direction as the fibers, put them into a hot press, and heat press at a temperature of 135°C and a pressure of 1.5MPa to a thic...

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Abstract

The invention relates to a method for producing benzyl bamboo engineering materials, which is characterized by comprising the following process steps: 1. preparing raw materials; 2. swelling raw materials at low temperature by alkaline solution; 3. performing benzylation treatment; and 4. performing hot press shaping treatment. The method has the following advantages that the crystal structure of bamboo fiber is damaged partially or completely through swelling at low temperature by the alkaline solution, then hydroxyl in a crystal zone is exposed completely to enable a benzylation agent to combine with the hydroxyl to a maximum extent to introduce a new group, so the prior microstructure and chemical features of the bamboo fiber are changed and bamboo has the hot melt processing property. Under the condition of not adding any adhesive, bamboo materials recombine to form a new material which keeps the advantages of the bamboo materials and has certain characteristics of plastic during hot press shaping, such as hot melt production, hygrothermal dimensional stability, high wear resistance and insect and corrosion preventing performance.

Description

technical field [0001] The invention relates to a method for preparing high-strength, anti-corrosion and insect-proof materials for indoor and outdoor use by using bamboo or bamboo processing strip residues through benzylation and hot-press fusion shaping. The invention belongs to the fields of wood science, bamboo engineering and wood-based panel technology. Background technique [0002] Bamboo resources are important timber resources in my country. Bamboo has excellent physiological characteristics such as short growth cycle, strong self-germination ability, continuous harvesting, and sustainable utilization. However, because the wettability of general adhesives to bamboo green and bamboo yellow is very poor, it is difficult to glue together; therefore the current industrial utilization methods of bamboo all need to remove bamboo green and bamboo yellow, resulting in a great waste of materials. Bamboos with smaller diameters or smaller wall thicknesses have not been indus...

Claims

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Application Information

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IPC IPC(8): B27N1/00B27N3/08B27N3/10B27K3/40B27K5/02
Inventor 孙丰文张彰孙恩惠
Owner NANJING FORESTRY UNIV
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