Method for preparation of bagasse-grafted methyl methacrylate copolymer by solid-phase method

A technology of branching methyl methacrylate and bagasse, which is applied in the field of preparation of bagasse-grafted methyl methacrylate copolymer by solid-phase method, can solve problems such as complicated process, difficult solvent recovery, and difficult separation of products, and meets the conditions Easy and simple process effect

Inactive Publication Date: 2014-08-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the disadvantages of complex process, difficult separation of products, and difficult recovery of solvents.

Method used

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  • Method for preparation of bagasse-grafted methyl methacrylate copolymer by solid-phase method
  • Method for preparation of bagasse-grafted methyl methacrylate copolymer by solid-phase method
  • Method for preparation of bagasse-grafted methyl methacrylate copolymer by solid-phase method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] a. Take 20g of bagasse that has passed through a 200-mesh sieve after being exposed to the sun and crushed, and add it to a sodium hydroxide solution with a mass fraction of 1% (the mass ratio of solid to liquid is 1:20) at a high speed (20 rpm) at 80°C Stir and react for 1 hour, wash with water until neutral, filter, and dry at 80°C for later use;

[0031] b. Take 5 g of bagasse that has been activated in a, add it to the reaction kettle, and add 5 g of deionized water, stir evenly and keep warm at 80°C.

[0032] c, get initiator ammonium persulfate 0.25g and dissolve in 0.5g deionized water to form a solution, add step b reaction system, stir and react for 30 minutes;

[0033] d. Add 0.5 g of the reaction monomer methyl methacrylate to the reaction system in step c, stir evenly, keep warm at 50°C, and react at a constant temperature for 30 minutes;

[0034] e. The reaction crude product in step d is filtered and washed 3 times with deionized water, placed in a vacuum...

Embodiment 2

[0037] a. Take 20g of bagasse that has passed through a 100-mesh sieve after being crushed by exposure to the sun, and add it to a potassium hydroxide solution with a mass fraction of 3% (the mass ratio of solid to liquid is 1:30) at a high speed (50 rpm) at 50°C. Stir and react for 4 hours, wash with water until neutral, filter, and dry at 90°C for later use;

[0038] b. Take 10 g of bagasse activated in step a, add it to the reaction kettle, and add 30 g of deionized water, stir evenly and keep warm at 80°C.

[0039] c. Dissolve 1 g of the initiator ammonium persulfate in 8 g of deionized water to form a solution, add it to the reaction system of step b, and stir for 45 minutes;

[0040] d. Add 5 g of the reaction monomer methyl methacrylate to the reaction system in step c, stir evenly, keep warm at 65°C, and react at a constant temperature for 45 minutes;

[0041] e. The reaction crude product in step d is filtered and washed 3 times with deionized water, placed in a vacu...

Embodiment 3

[0044] a. Take 20g of bagasse that has passed through an 80-mesh sieve after exposure to the sun and crushed, add it to a concentrated ammonia solution with a mass fraction of 5% (solid-to-liquid mass ratio is 1:50) and stir at a high speed (50 rpm) at 80°C React for 4 hours, wash with water until neutral, filter, and dry at 105°C for use;

[0045] b. Take 10 g of bagasse activated in step a, add it into the reaction kettle, and add 40 g of deionized water, stir evenly and keep warm at 105°C.

[0046] c, get initiator ammonium persulfate 1.5g and dissolve in 10g deionized water to form a solution, add to step b reaction system, stir and react for 60 minutes;

[0047] d. Add 10 g of the reaction monomer methyl methacrylate to the reaction system in step c, stir evenly, keep warm at 80° C., and react at constant temperature for 60 minutes;

[0048] e. The reaction crude product in step d is filtered and washed 3 times with deionized water, placed in a vacuum oven, and dried at 10...

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Abstract

The invention discloses a method for preparation of a bagasse-grafted methyl methacrylate copolymer by a solid-phase method. The method comprises the steps: exposing bagasse after sugar rolling in a sugar refinery to the sun, then passing through an 80-200 mesh sieve, adding an alkaline liquor with the mass fraction of 1%-5%, carrying out a high-speed stirring reaction for 1-4 hours at the temperature of 50-80 DEG C, washing, and drying to be used as activating-treated bagasse; charging materials in a reaction kettle according to a ratio of the activating-treated bagasse, an initiator, a monomer and deionized water of 1:0.05-0.15:0.1-1:0.1-1, carrying out a constant-temperature reaction for 30-60 minutes at the temperature of 50-80 DEG C, and thus obtaining a crude product of the bagasse-grafted methyl methacrylate copolymer; and by a Soxhlet extractor, separating and purifying to obtain the pure bagasse-grafted methyl methacrylate copolymer. The method not only has the advantages of high product grafting ratio, simple operation, low reaction temperature, no solvent pollution and simple post-treatment, but also is lower in product comprehensive production costs and wide in application.

Description

technical field [0001] The invention relates to a method for preparing a copolymer, in particular to a method for preparing a bagasse-grafted methyl methacrylate copolymer by a solid phase method. Background technique [0002] Bagasse is the main by-product of the sugar industry. It is the main part left after sugar cane is mechanically pressed. It belongs to agricultural solid waste. Poor stability and so on limit its application. If specific groups are grafted on the cellulose macromolecular chain of bagasse, such shortcomings can be effectively overcome and excellent properties such as thermoplasticity, high elasticity, high absorption, high heat resistance and ion exchange can be obtained, thereby using It is used in the fields of composite materials, biodegradable materials, ion exchange resins, water-absorbing resins and flocculants. It can not only turn the waste of sugarcane bagasse into wealth, but also expand its application range. [0003] In recent years, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00
Inventor 戈明亮郑罗云周向阳
Owner SOUTH CHINA UNIV OF TECH
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