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A kind of acetylation modification processing method of poplar wood powder

A treatment method, acetylation technology, applied in wood treatment, wood treatment details, wood processing equipment, etc., can solve the problems of high energy consumption, high cost, long production cycle, etc., and achieve high efficiency, high substitution degree, and low water absorption rate effect

Inactive Publication Date: 2015-08-19
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a method for acetylation modification of poplar wood powder, the purpose of which is to solve the problems of high energy consumption, high cost and long production cycle in the existing lignocellulose modification method, Provides a method for pretreating wood flour using ultrasonic activation and acetylating modified wood flour under microwave conditions

Method used

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  • A kind of acetylation modification processing method of poplar wood powder
  • A kind of acetylation modification processing method of poplar wood powder
  • A kind of acetylation modification processing method of poplar wood powder

Examples

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Embodiment 1

[0033] An acetylation modification treatment method of poplar wood powder: add poplar wood powder and glacial acetic acid to the container according to the mass ratio of poplar wood powder: glacial acetic acid = 1:10, and activate it in an ultrasonic environment with stirring at room temperature Treatment, the ultrasonic power is 300W, and the time is 7min. Then add acetic anhydride and concentrated sulfuric acid to the container according to the mass ratio of wood flour: acetic anhydride: catalyst = 1:5:0.1, place in a microwave reactor for 6 minutes, microwave power 500W, stir at room temperature for 20 minutes after microwave treatment. The reacted wood powder was washed with deionized water and suction-filtered to obtain a filter cake, which was dried in an oven at 105° C. for 12 hours to obtain acetylated wood powder.

Embodiment 2

[0035] A method for acetylation modification of poplar wood powder: add poplar wood powder and glacial acetic acid to the container according to the mass ratio of poplar wood powder: glacial acetic acid = 1:15, and activate it in an ultrasonic environment with stirring at room temperature For processing, the ultrasonic power is 500W, and the time is 5min. Then add acetic anhydride, acetic anhydride and perchloric acid into the container according to the mass ratio of wood powder: acetic anhydride: catalyst = 1:9:0.08, and place it in a microwave reactor for 7 minutes, with a microwave power of 350W. After microwave treatment Stir at room temperature for 40min. The reacted wood powder was washed with deionized water and suction filtered to obtain a filter cake, which was placed in an oven and dried at 105°C for 12 hours to obtain acetylated wood powder. See Figure 3-b .

Embodiment 3

[0037]An acetylation modification treatment method of poplar wood powder: add poplar wood powder and glacial acetic acid to the container according to the mass ratio of poplar wood powder: glacial acetic acid = 1:12, and activate it in an ultrasonic environment under stirring at room temperature For processing, the ultrasonic power is 600W, and the time is 4min. Then add acetic anhydride, concentrated sulfuric acid and trifluoroacetic acid into the container according to the mass ratio of wood flour: acetic anhydride: catalyst = 1:7:0.15, wherein the ratio of concentrated sulfuric acid and trifluoroacetic acid is 1:1, and place Irradiate in a microwave reactor for 8 minutes, microwave power 300W, and stir at room temperature for 8 minutes after microwave treatment. The reacted wood powder was washed with deionized water and suction-filtered to obtain a filter cake, which was dried in an oven at 105° C. for 12 hours to obtain acetylated wood powder.

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Abstract

The invention discloses a poplar powder acetylation modified processing method, which comprises the following steps: adding a poplar powder and acetate acid gracial according to the mass ratio of the poplar powder: acetate acid gracial=1:5-20 into a container, stirring at room temperature and carrying out an activating treatment in a supersonic-wave environment (ultrasound power is 200-1000W and time is 2-10min), adding acetic anhydride and a catalyst according to the mass ratio of the wood powder:acetic anhydride: the catalyst=1:2-10:0.05-0.2, irradiating in a microwave reaction instrument for 5-15min (microwave power is 100-500W), stirring at room temperature for 10-90min after the reaction, washing with deionized water and carrying out pumping filtration to obtain a filter cake, and drying at 105 DEG C to a constant weight so as to obtain the acetylized wood powder. The invention has the following advantages: a wood plastic composite prepared by blending of plastics such as polylactic acid or polyolefin and the like has low water absorption, good dimensional stability and weatherability; the processing method is simple to operate, has low energy consumption, requires short reaction time and has no pollutant; and acetate acid gracial can be recycled.

Description

technical field [0001] The invention relates to an acetylation modification treatment method of poplar wood powder, in particular to a modification method of wood powder which can be blended with plastics such as polylactic acid or polyolefin to prepare wood-plastic materials. Background technique [0002] The annual output of biomass resources in my country is huge, and there is a broad space for development and utilization. The efficient conversion of biomass resources into biomass materials can effectively alleviate the energy and environmental problems faced by human beings. Among them, plant fiber is an inexhaustible natural polymer material on the earth. It has the characteristics of environmental friendliness and renewability. It has a wide range of production fields such as food, medicine, chemical industry, textile, and papermaking. use. Therefore, the development and utilization of cellulose resources is of great significance. [0003] Wood-plastic composite (WPC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/14C08L97/00B27K5/00
Inventor 金立维储富祥王春鹏张明明谢振华
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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