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Preparation method of porous structure functional wood base material

A wood-based, functional technology, applied in wood heating, wood impregnation, wood treatment, etc., can solve problems such as environmental pollution, achieve environmental friendliness, uniform pores, and reduce production costs

Active Publication Date: 2019-08-27
林扬东方(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problems that the sodium hydroxide method and the sodium chlorite method used in the past are easy to cause environmental pollution, etc. At the same time, the atomic utilization rate of the DES system is 100%, can be reused, has no follow-up wastewater treatment problem, is environmentally friendly, and saves resources

Method used

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  • Preparation method of porous structure functional wood base material
  • Preparation method of porous structure functional wood base material
  • Preparation method of porous structure functional wood base material

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Heating choline chloride and oxalic acid at a molar ratio of 1:1 at 90°C for 0.5h to prepare a DES solution;

[0037] (2) Put poplar wood into the 500mL beaker of DES solution prepared in step (1), the bath ratio is 1: 20, the heating temperature is 90°C, and the heating time is 6h;

[0038] (3) Take out the wood sample treated with DES in step (2), and after natural cooling, first clean the DES on the surface with deionized water, then soak the wood in absolute ethanol to remove the remaining reaction solution, and the soaking time is 2h;

[0039] (4) add 10% H to the wood obtained in step (3) to remove a large amount of lignin and hemicellulose 2 o 2 solution, and then slowly dropwise add NaOH solution to pH 9, and heat the above solution at a reaction temperature of 80°C for 6h;

[0040] (5) Soak the wood prepared in step (4) in absolute ethanol with a solid-to-liquid ratio of 1:5 for 2 hours, and exchange the remaining reaction solution in the wood;

[0041] ...

Embodiment 2

[0045] (1) heating choline chloride and formic acid at 60° C. for 2 hours at a molar ratio of 1:2 to obtain a DES solution;

[0046] (2) put the balsa wood into the 500mL beaker of the DES solution prepared in the step (1), and immerse completely, the bath ratio is 1: 20, the heating temperature is 120 ℃, and the heating time is 4h;

[0047] (3) The wood sample treated with DES in step (2) is taken out, after natural cooling, the DES on the surface is cleaned with deionized water, and then soaked in acetone to remove the remaining reaction solution. The soaking time is 4h;

[0048] (4) add 30% H to the wood obtained in step (3) to remove a large amount of lignin and hemicellulose 2 o 2 solution, and then slowly dropwise add 10% NaOH solution to pH 11, and heat the above solution at a reaction temperature of 120°C for 2 hours;

[0049] (5) Soak the wood prepared in step (4) in an acetone solution with a solid-to-liquid ratio of 1:5 for 4 hours, and exchange the remaining reacti...

Embodiment 3

[0054] (1) heating choline chloride and lactic acid at a molar ratio of 1:1 at 80°C for 1.5h to prepare a DES solution;

[0055] (2) Put Paulownia wood into the DES solution 500mL beaker that makes in step (1) and submerge completely, bath ratio is 1: 20, and heating temperature is 60 ℃, and heating time is 10h;

[0056] (3) Take out the wood sample treated with DES in step (2), and after natural cooling, first clean the DES on the surface with deionized water, then soak the wood in a mixed solution of absolute ethanol and acetone to remove the remaining reaction solution, and the soaking time is 6h;

[0057] (4) add 20% H to the wood obtained in step (3) to remove a large amount of lignin and hemicellulose 2 o 2 solution, and then slowly drop NaOH solution dropwise until the pH is 10.5, and heat the above solution at a reaction temperature of 100°C for 4h;

[0058] (5) Soak the wood prepared in step (4) in a mixed solution of absolute ethanol and acetone with a solid-to-li...

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Abstract

The invention discloses a preparation method of a porous structure functional wood base material. The preparation method comprises the following steps: heating choline chloride and binary acid at thetemperature of 60 to 90 DEG C for 0.5 to 2 h to synthesize an eutecticevaporate solvent (DES), then carrying out immersion treatment on wood at the temperature of 60 to 120 DEG C for 4 to 10 h so as to remove lignin and hemicellulose, then adding H2O2 and adjusting pH value to be 9 to 11with a NaOH solution, and finally carrying out freeze drying to obtain the porous structure wood base material.The preparation method is characterized in that the preparation technology is simple, environmentally-friendly, low in cost and free of subsequent treatment problem; the obtained wood base material ishigh in porosity, reasonable in hole structure distribution, moderate in hole diameter, low in density and excellent in adsorption performance; and the used DES reaction reagent can be used repeatedly, the removed lignin can be recycled, and the utilization rate of resources is improved. The porous structure functional wood base material can perform corresponding modification treatment accordingto different requirements, and is applied to the fields of buildings, medicine, sewage purification and the like.

Description

technical field [0001] The invention relates to the field of functional modification of wood, in particular to a technology for preparing a multi-porous structure functional wood base material. Background technique [0002] In recent years, people have paid more and more attention to the development and utilization of natural biomass materials, and new structural wood has become a research hotspot today. Due to the special structure and composition of wood, selectively removing lignin and hemicellulose from wood, destroying its parenchyma cells, and retaining the three-dimensional morphological structure, so as to construct a porous structure wood substrate is currently a popular method for the utilization of wood resources. research direction. In existing studies, this kind of porous wood substrate can be made into wood sponge, which can be used in sewage purification; it can also be made into wood film adsorption material, which can absorb metal ions in sewage; it can als...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/50B27K5/00B27K5/04
CPCB27K3/02B27K3/50B27K5/0005B27K5/001B27K5/04
Inventor 杨蕊徐真杜竞韬连海兰洪枢梅长彤翟胜丞彭俊懿李晓娟
Owner 林扬东方(北京)科技有限公司
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