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Novel mildew-proof recombined bamboo based on pyrolytic tar-phenolic resin, and preparation method thereof

A technology of phenolic resin and phenolic resin glue, which is applied in the field of new anti-mildew recombinant bamboo and its preparation, can solve the problems of restricting large-scale promotion and application, affecting the use value and appearance, and prone to mildew, etc., so as to reduce dependence on petrochemical resources, Improve the utilization rate of raw materials and improve the effect of product cost performance

Pending Publication Date: 2020-04-17
BEIJING FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Recombined bamboo is prone to mildew under hot and humid environmental conditions, which affects its use value and appearance, thereby limiting its large-scale application. This application provides a new type of mold-proof recombinant bamboo based on pyrolysis oil phenolic resin and its preparation method

Method used

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  • Novel mildew-proof recombined bamboo based on pyrolytic tar-phenolic resin, and preparation method thereof
  • Novel mildew-proof recombined bamboo based on pyrolytic tar-phenolic resin, and preparation method thereof
  • Novel mildew-proof recombined bamboo based on pyrolytic tar-phenolic resin, and preparation method thereof

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preparation example Construction

[0057] The application also provides a method for preparing an adhesive layer, said method comprising the steps of:

[0058] 1) Weighing resin synthesis raw materials such as phenol, formaldehyde, pyrolysis oil and sodium hydroxide solution according to a certain ratio.

[0059] 2) Add all the measured phenol, part of the formaldehyde solution (70% to 80% of the total mass) and part of the sodium hydroxide solution (40% to 50% of the total mass) into the synthesis reactor in sequence, and stir the reaction raw material mixture .

[0060] 3) Start the heating device, slowly and gradually raise the temperature of the mixture to (90±3)°C within 20 minutes, and keep it warm for 40-60 minutes;

[0061] 4) Start the cooling device, cool the mixed solution to 75°C, add the remaining formaldehyde solution (20%-30% of the total mass), pyrolysis oil and sodium hydroxide solution (25-30% of the total mass);

[0062] 5) Slowly raise the temperature of the mixture to (90±3)°C within 10-1...

Embodiment 1

[0081] (1) Bamboo bunch preparation: take moso bamboo as raw material, cut the original bamboo of moso bamboo into a certain length of bamboo tube, then longitudinally split it into two semicircular bamboo tubes along its diameter, and remove the inner section; , Cross-linked with each other and maintain the original arrangement of the fiber network loose bundle unit.

[0082] (2) Thermal cracking and liquefaction of bamboo residues: crush and dry the bamboo processing residues such as bamboo chips and bamboo shreds produced during the raw bamboo preparation process, crush until the particle size is less than or equal to 40 mesh, and dry until the moisture content is less than 5% ; The dried bamboo particles are thermally cracked and liquefied in a fluidized bed pyrolysis reactor, the reaction conditions are: reaction temperature (500 ± 10) ° C, gas phase residence time ≤ 2s, condensation temperature ≤ 4 ° C, the collected Bamboo pyrolysis oil is refrigerated for standby, bamb...

Embodiment 2

[0093] (1) Preparation of bamboo bundles: using Cizhu as raw material, the original bamboo of Cizhu is cut into a bamboo tube of a certain length, then longitudinally divided into two semicircular bamboo tubes along its diameter, and the inner section is removed; It is a network-like loose bundle unit that is cross-linked and maintains the original arrangement of fibers.

[0094] (2) Thermal cracking and liquefaction of bamboo residues: crush and dry the bamboo processing residues such as bamboo chips and bamboo shreds produced during the raw bamboo preparation process, crush until the particle size is less than or equal to 40 mesh, and dry until the moisture content is less than 5% ; The dried bamboo particles are thermally cracked and liquefied in a fluidized bed pyrolysis reactor, the reaction conditions are: reaction temperature (520 ± 10) ° C, gas phase residence time ≤ 2s, condensation temperature ≤ 4 ° C, the collected Bamboo pyrolysis oil is refrigerated for standby, b...

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Abstract

The invention belongs to the technical field of bamboo processing and forest industry. Recombined bamboo is prone to mildew under a humid and hot environment condition, the use value and appearance ofthe recombined bamboo are affected, and then large-scale application and popularization of the recombined bamboo are limited. The invention provides a novel mildew-proof recombined bamboo based on pyrolytic tar-phenolic resin. The novel mildew-proof recombined bamboo based on pyrolytic tar-phenolic resin sequentially comprises a first surface layer, a first adhesive layer, a core layer, a secondadhesive layer and a second surface layer, the first surface layer is connected with the core layer through the first adhesive layer, and the second surface layer is connected with the core layer through the second adhesive layer; and the first adhesive layer is a pyrolytic tar-phenolic resin adhesive layer, and the second adhesive layer is the pyrolytic tar-phenolic resin adhesive layer. The residues of a bamboo processing enterprise are fully utilized by adopting thermal cracking refining and resin synthesis technologies and are added into the production process of the recombined bamboo to make the recombined bamboo have certain mildew-proof and antibacterial properties, so that the production cost of the recombined bamboo is reduced, and the product performance of the recombined bamboois improved.

Description

technical field [0001] The application belongs to the technical field of bamboo processing and forest product industry, and in particular relates to a novel anti-mold recombined bamboo based on pyrolysis oil phenolic resin and a preparation method thereof. Background technique [0002] Recombined bamboo is a bamboo recombined material made by mechanically decomposing bamboo into fibrous bamboo bundles, drying, carbonizing, dipping, drying, laying in molds along the grain, and curing under high temperature and high pressure. Specifically, after the bamboo is split and loosened into loose bamboo bundle fibers, it is impregnated with chemical polymers such as low molecular weight resins, and the microcracks formed by the loosening are purposefully introduced into the cell cavity, wall, and grain. In different tissues such as holes, after the blanks are assembled along the grain, the fibrous bamboo bundles are pressed into recombined bamboo by hot pressing or cold pressing and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/34B27K9/00B27N3/04B27N3/12B27N1/00B32B9/02B32B9/04B32B7/12B32B37/06B32B37/10B32B37/12C08G8/28C09J161/14
CPCB27K3/34B27K9/002B27N3/04B27N3/12B27N1/00B32B37/00B32B5/028B32B5/26B32B7/12B32B37/06B32B37/10B32B37/1284C08G8/28C09J161/14B32B2250/20B32B2262/065B32B2307/7145B27K2200/15B27K2240/20
Inventor 任学勇陈复明马晓宇陶涤扬李征王戈常建民
Owner BEIJING FORESTRY UNIVERSITY
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