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A kind of preparation method of high-strength regenerated cellulose film

A regenerated cellulose membrane and high-strength technology, applied in the field of polymer materials, can solve the problems of poor mechanical properties and heat resistance of regenerated cellulose membranes, achieve enhanced force, improved breaking strength and mechanical properties, and improved resistance Effect of heat and antibacterial properties

Active Publication Date: 2019-08-23
云南东欣土工材料制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: Aiming at the problems of poor mechanical properties and heat resistance of traditional regenerated cellulose membranes, a preparation method of high-strength regenerated cellulose membranes is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020]Move the raw material into a pulverizer and pulverize for 35 minutes to obtain a pulverized raw material. Mix the pulverized raw material and a nitric acid solution with a mass fraction of 15% in a flask at a mass ratio of 1:20, boil the material in the flask to reflux for 5 hours, and filter to obtain a filter cake. Wash the filter cake 8 times with deionized water to obtain a water-washed filter cake, move the water-washed filter cake into a pulverizer, pulverize for 15 minutes, and obtain the acid hydrolysis raw material, and mix the acid hydrolysis raw material and a 20% sodium hydroxide solution by mass Mix it in a four-necked flask at a ratio of 1:15, boil and reflux the materials in the four-necked flask for 3 hours, filter to obtain a filter residue, which is the raw material for alkali hydrolysis, and mix the raw material for alkali hydrolysis with a hydrogen peroxide solution with a mass fraction of 30% according to the mass ratio Mix 1:15 in a beaker, move the ...

example 2

[0022] Move the raw material into a pulverizer and pulverize for 35 minutes to obtain a pulverized raw material. Mix the pulverized raw material and a nitric acid solution with a mass fraction of 15% in a flask at a mass ratio of 1:20, boil the material in the flask to reflux for 5 hours, and filter to obtain a filter cake. Wash the filter cake 8 times with deionized water to obtain a water-washed filter cake, move the water-washed filter cake into a pulverizer, pulverize for 15 minutes, and obtain the acid hydrolysis raw material, and mix the acid hydrolysis raw material and a 20% sodium hydroxide solution by mass Mix it in a four-necked flask at a ratio of 1:15, boil and reflux the materials in the four-necked flask for 3 hours, filter to obtain a filter residue, which is the raw material for alkali hydrolysis, and mix the raw material for alkali hydrolysis with a hydrogen peroxide solution with a mass fraction of 30% according to the mass ratio Mix 1:15 in a beaker, move the...

example 3

[0024] Move the raw material into a pulverizer and pulverize for 35 minutes to obtain a pulverized raw material. Mix the pulverized raw material and a nitric acid solution with a mass fraction of 15% in a flask at a mass ratio of 1:20, boil the material in the flask to reflux for 5 hours, and filter to obtain a filter cake. Wash the filter cake 8 times with deionized water to obtain a water-washed filter cake, move the water-washed filter cake into a pulverizer, pulverize for 15 minutes, and obtain the acid hydrolysis raw material, and mix the acid hydrolysis raw material and a 20% sodium hydroxide solution by mass Mix it in a four-necked flask at a ratio of 1:15, boil and reflux the materials in the four-necked flask for 3 hours, filter to obtain a filter residue, which is the raw material for alkali hydrolysis, and mix the raw material for alkali hydrolysis with a hydrogen peroxide solution with a mass fraction of 30% according to the mass ratio Mix 1:15 in a beaker, move the...

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Abstract

The invention discloses a preparation method of a high-strength regenerated cellulose membrane and belongs to the technical field of high-polymer materials. The preparation method includes: crushing raw materials in a crushing machine, allowing the crushed raw material to have mixed reaction with a nitric acid solution to obtain acid-hydrolyzed raw materials, allowing the acid-hydrolyzed raw materials to have mixed reaction with a sodium hydroxide solution and then to have mixed reaction with a hydrogen peroxide solution to obtain a cellulose blank, mixing dimethyl acetamide with the cellulose blank, performing high-temperature reaction under nitrogen protection, cooling, adding a lithium chloride solution to perform reaction, cooling after cellulose is completely dissolved, feeding into air, sequentially adding a modified chitosan solution and a crosslinking agent, performing stirring reaction, cooling to room temperature, performing ultrasonic oscillation to obtain membrane preparation liquid, transferring the membrane preparation liquid into a coating machine, coating a substrate, and extracting the substrate in an extracting agent to obtain the high-strength regenerated cellulose membrane. The regenerated cellulose membrane prepared by the method is good in mechanical performance and breaking strength.

Description

technical field [0001] The invention discloses a preparation method of a high-strength regenerated cellulose film, belonging to the technical field of polymer materials. Background technique [0002] With the increasingly serious environmental problems and the sharp reduction of oil and coal reserves, people gradually focus on the development and utilization of renewable resources, especially in the field of preparation and application of high-performance materials. Cellulose is the most widely distributed and abundant natural polymer in nature. It has many advantages such as cheap, easy to obtain, non-toxic, good regeneration, and environmental friendliness. Plants produce about 150 billion tons of cellulose every year through photosynthesis. These celluloses are considered to be important raw materials for the development of new energy and new materials in the future, and have received more and more attention. At present, cellulose is widely used in fuel ethanol, papermak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L5/08C08K3/36C08K5/20C08J3/24
Inventor 徐颜峰张琳
Owner 云南东欣土工材料制造有限公司
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