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A Novel Green Degradable High Elastic Membrane Material

A high-elasticity, membrane material technology, applied in the field of new green degradable high-elasticity membrane materials, can solve the problems of strength reduction, easy hydrolysis of hemicellulose membranes, etc., and achieve the effects of low production cost, environmental friendliness and simple production process

Active Publication Date: 2020-07-14
金华市联宾塑料制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is difficult to overcome the problem that the hemicellulose membrane is easily hydrolyzed during processing, resulting in a decrease in strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A novel green degradable high elastic membrane material, the preparation method comprising the following steps:

[0018] (1) Add 80ml of ethanol and 4g of hemicellulose into the beaker, add 30% sodium hydroxide solution under stirring, mix and stir for 15 minutes and heat to 60°C, add 6g of Stir evenly, heat up to 80°C under heating in a water bath, gelatinize for 30 minutes, cool to room temperature naturally, and refrigerate the gelatinized product cooled to room temperature at 0°C for 10 hours to form a gel liquid;

[0019] (2) Add 20ml of ethanol to the gel solution, and add 7g of chloroacetic acid under stirring, heat up to 50°C, continue mechanical stirring for 30 minutes, add 3.0g of polyvinyl alcohol and 2.5g of sodium hydroxide, at 70°C The etherification reaction was carried out for 3 hours, and the obtained reaction liquid was neutralized with hydrochloric acid solution until the pH value was between 7.2-7.3, and suction filtered, and the obtained product was...

Embodiment 2

[0025] A novel green degradable high elastic membrane material, the preparation method comprising the following steps:

[0026] (1) Add 90ml of ethanol and 4.5g of hemicellulose into the beaker, add a sodium hydroxide solution with a mass concentration of 33% under stirring, mix and stir for 18 minutes and heat to 65°C, add 7g of Stir evenly, heat up to 85°C under heating in a water bath, gelatinize for 35 minutes, cool to room temperature naturally, and refrigerate the gelatinized product cooled to room temperature at 3°C ​​for 11 hours to form a gel liquid;

[0027] (2) Add 25 milliliters of ethanol to the gel solution, and add 7.5 grams of chloroacetic acid under stirring, heat up to 55 ° C, continue mechanical stirring for 35 minutes, add 3.3 grams of polyvinyl alcohol and 2.8 grams of sodium hydroxide, at 75 ° C The etherification reaction was carried out for 3.5 hours, and the obtained reaction liquid was neutralized with hydrochloric acid solution until the pH value was...

Embodiment 3

[0033] A novel green degradable high elastic membrane material, the preparation method comprising the following steps:

[0034] (1) Add 100ml of ethanol and 5g of hemicellulose into the beaker, add a sodium hydroxide solution with a mass concentration of 35% under stirring, mix and stir for 20 minutes and heat to 70°C, add 6- 8 grams of starch, stir evenly, heat up to 90°C under heating in a water bath, gelatinize for 40 minutes, naturally cool to room temperature, and refrigerate the gelatinized product cooled to room temperature at 5°C for 12 hours to form a gel liquid;

[0035] (2) Add 20-30 milliliters of ethanol to the gel solution, and add 8 grams of chloroacetic acid under stirring, heat up to 60 ° C, continue mechanical stirring for 40 minutes, add 3.5 grams of polyvinyl alcohol and 3.0 grams of sodium hydroxide, in Etherification reaction at 80°C for 4 hours, the obtained reaction solution was neutralized with hydrochloric acid solution until the pH value was between ...

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Abstract

The invention relates to the technical field of membrane material research and development and preparation and discloses a novel green degradable high-elasticity membrane material. Modified hemicellulose has good compatibility with sorbitol, the two components infiltrate into each other and are tightly integrated, micro-molecules replace hydrogen bonding of hemicellulose macro-molecules, the micro-molecules and hemicellulose macro-molecule chains form a three-dimensional network-like structure in a hydrogen bond way, membrane material cracks are gradually decreased, a membrane becomes soft, thus the membrane formation performance is improved, the membrane has very high elasticity and ductility, the thickness is as small as 0.05 mm, the transparency is high, the tensile strength is 17.1-17.5 MPa, and the elongation at break is up to 610-620%, and the novel green degradable high-elasticity membrane material has excellent environmentally-friendly and degradable properties and the like andhas a good application prospect, a production process is simple, raw material sources are rich, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of research and development and processing of membrane materials, and in particular relates to a novel green degradable high-elasticity membrane material. Background technique [0002] Membrane technology has the advantages of high efficiency, energy saving, simple equipment, easy process control, environmental friendliness, and easy integration with other technologies [0003] Integration and other features. As a functional membrane, the composite membrane not only has the characteristics of the general membrane, but also has the inherent properties of the added substance itself, such as high temperature resistance, corrosion resistance, high strength, ion exchange, conductivity, ultraviolet absorption, etc. Membrane has attracted extensive attention from all over the world, and has become a hot spot in the research of membrane materials. Membranes can generally be divided into inorganic membranes, dense ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L3/02C08L5/14C08L29/04C08K5/053C08K5/092C08B37/14
CPCC08B37/00C08J5/18C08J2303/02C08J2405/14C08J2429/04C08K5/053C08K5/092
Inventor 刘顶康
Owner 金华市联宾塑料制品有限公司
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