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Wood fiber homogeneous phase transesterification modification method

A wood fiber and esterification modification technology, which is applied in the chemical modification of wood fiber and homogeneous transesterification modification of wood fiber, can solve the problems that affect the use of wood fiber products and the catalyst is difficult to separate, and achieve the degree of modification Easy to control, easy to recycle, and mild modification conditions

Active Publication Date: 2015-12-23
GUANGDONG INST OF MICROBIOLOGY GUANGDONG DETECTION CENT OF MICROBIOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the reaction is completed, the catalyst is difficult to separate and remains in the wood fiber, which affects the use of wood fiber products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The wood fiber of the present embodiment adopts straw, and the homogeneous transesterification modification method of wood fiber is as follows:

[0026] (1), rice straw is dissolved in 1-ethyl-3-methylimidazole formic acid salt, the massfraction of rice straw in 1-ethyl-3-methylimidazole formic acid salt is 0.1%, and the control dissolution temperature is 50°C, the dissolution time is 48h, and the straw solution is obtained;

[0027] (2) Vinyl acetate is added to the rice straw solution, the mass ratio of vinyl acetate to rice straw is 20:1, the reaction temperature is controlled at 110° C., the reaction time is 0.5 h, and transesterification modification is carried out;

[0028] (3), pour the reaction solution of step (2) into water, control the water volume and 1-ethyl-3 methylimidazole formate mass ratio to be 5:1, collect the precipitate, wash, filter, dry to obtain homogeneous Phase esterification modified rice straw.

[0029] After transesterification modificati...

Embodiment 2

[0031] The wood fiber of the present embodiment adopts bagasse, and the homogeneous transesterification modification method of the wood fiber is as follows:

[0032] (1), bagasse is dissolved in 1-butyl-3-methylimidazole propionate, the mass fraction of bagasse in 1-butyl-3-methylimidazole propionate is 20%, and the dissolution is controlled The temperature is 170°C, the dissolution time is 0.2h, and the bagasse solution is obtained;

[0033] (2), adding isopropenyl acetate to the bagasse solution, the mass ratio of isopropenyl acetate to bagasse is 0.1:1, the reaction temperature is controlled to be 30°C, the reaction time is 4h, and homogeneous transesterification is carried out. sexual manipulation;

[0034] (3), pour the reaction solution of step (2) into methanol / water (volume ratio is 1:1), control the mass ratio of methanol / water volume to 1-butyl-3-methylimidazole propionate to be 50 : 1, collecting the precipitate, washing, filtering and drying to obtain the esterif...

Embodiment 3

[0037] The wood fiber of the present embodiment adopts eucalyptus, and the homogeneous transesterification modification method of wood fiber is as follows:

[0038] (1), eucalyptus is dissolved in 1-ethyl-3-methylimidazole acetate, and the massfraction of eucalyptus in 1-ethyl-3-methylimidazole acetate is 5%, control dissolving The temperature is 110°C and the dissolution time is 10 hours to obtain the eucalyptus solution;

[0039] (2) Vinyl acetate is added to the eucalyptus solution, the mass ratio of vinyl acetate to eucalyptus is 5:1, the reaction temperature is controlled at 70°C, and the reaction time is 2h, and transesterification modification is carried out;

[0040] (3), pour the reaction solution of step (2) into ethanol, control the mass ratio of ethanol volume and 1-ethyl-3-methylimidazole acetate to 20:1, collect the precipitate, wash, filter, and dry Obtain homogeneously esterified modified eucalyptus.

[0041] After transesterification modification, the mass i...

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PUM

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Abstract

The invention discloses a wood fiber homogeneous phase transesterification modification method. Wood fibers are dissolved in an ionic liquid, transesterification agents are added to react with the wood fibers, and esterified modified wood fibers are obtained after deposition, washing, filtering and drying. The method is advantageous in that reaction conditions are mild, the technology is simple, the modification efficiency is high, the modification degree is easy to control, catalysts are not needed, products are easy to separate, no acidic by-products are generated during the reaction, degradation of wood fiber components cannot be caused, the employed ionic liquid can be recycled, and the wood fiber substitution degree is easy to control. The provided method has high practicality and good economic prospects.

Description

Technical field: [0001] The invention belongs to the technical field of lignocellulosic biomass conversion, in particular to a chemical modification method of lignocellulosic fibers, in particular to a homogeneous transesterification modification method of lignocellulosic fibers. Background technique: [0002] Since ancient times, wood fiber has been used as an engineering material in construction, furniture and other industries. However, due to the complex structure of lignocellulosic cell walls, it can only be processed simply by means of planing, nailing, sawing, etc., and it is difficult to be processed by modern technology; in addition, lignocellulosic fibers have disadvantages such as non-corrosion resistance and easy degradation, which limit the high value of lignocellulosic fibers. development and utilization. [0003] Chemical modification is an important way of high-value utilization of wood fiber. Through chemical modification, the dimensional stability, corrosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00
Inventor 陈铭杰施庆珊
Owner GUANGDONG INST OF MICROBIOLOGY GUANGDONG DETECTION CENT OF MICROBIOLOGY
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