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A kind of preparation method of high tensile elastic cellulose film

A stretching elastic, cellulose film technology, applied in the field of preparation of high stretch elastic cellulose film, can solve the problems of inability to meet the requirements of packaging use, rupture of cellulose film, poor tensile elasticity of cellulose film, etc. The effect of oily surface, improved solubility and degradability, high biocompatibility

Active Publication Date: 2019-12-31
BENGBU WEIGUANG PLASTIC PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a method for preparing a high-stretch elastic cellulose film, aiming at the defects that the current domestically produced cellulose film has poor tensile elasticity, easily causes the cellulose film to break, and cannot meet the requirements for packaging and use.

Method used

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  • A kind of preparation method of high tensile elastic cellulose film

Examples

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Effect test

example 1

[0025] In parts by weight, 13 parts of polyvinylidene fluoride, 2 parts of cellulose acetate, 50 parts of dimethylacetamide, 5 parts of polyvinylpyrrolidone, and 4 parts of lithium chloride are placed in a water bath, and the stirrer is started at 400r Start stirring at a speed of 1 / min, heat up to 60°C, stir and mix for 12 hours, then cool down to 40°C and let stand for defoaming for 12 hours to obtain a casting solution; put 6g of sodium alginate powder into a dropping funnel and stir In the three-necked flask of the device, start the stirrer, start stirring at a speed of 300r / min, put 40mL of sodium periodate solution with a mass fraction of 10% into the dropping funnel, and pour it into the three-necked flask at a dropping rate of 4mL / min. Add sodium alginate solution dropwise to the solution, after the dropwise addition, protect the three-necked flask from light, react at room temperature for 20 hours, and obtain the oxidation product solution; add 4mL ethylene glycol to t...

example 2

[0027] In parts by weight, 14 parts of polyvinylidene fluoride, 4 parts of cellulose acetate, 55 parts of dimethylacetamide, 5 parts of polyvinylpyrrolidone, and 4 parts of lithium chloride are placed in a water bath, and the stirrer is started at 450r Start stirring at a speed of 1 / min, heat up to 65°C, stir and mix for 13.5 hours, then cool down to 45°C and stand for defoaming for 13 hours to obtain a casting solution; put 8g of sodium alginate powder into a dropping funnel and In the three-necked flask of the agitator, start the agitator, start stirring at a speed of 320r / min, put 50mL of sodium periodate solution with a mass fraction of 10% into the dropping funnel, and pour it into the three-necked flask at a rate of 5mL / min. Add sodium alginate solution dropwise into the flask. After the dropwise addition, protect the three-necked flask from light and react at room temperature for 22 hours to obtain an oxidation product; add 4 mL of ethylene glycol to the above oxidation ...

example 3

[0029] In parts by weight, 15 parts of polyvinylidene fluoride, 5 parts of cellulose acetate, 60 parts of dimethylacetamide, 6 parts of polyvinylpyrrolidone, and 5 parts of lithium chloride are placed in a water bath, and the stirrer is started at 500r Start stirring at a speed of 1 / min, heat up to 70°C, stir and mix for 15 hours, then cool down to 50°C and let stand for defoaming for 14 hours to obtain a casting solution; put 10g of sodium alginate powder into a dropping funnel and stir In the three-necked flask of the device, start the stirrer, start stirring at a speed of 500r / min, put 60mL of sodium periodate solution with a mass fraction of 10% into the dropping funnel, and pour it into the three-necked flask at a dropping rate of 6mL / min. Sodium alginate solution was added dropwise to the solution, after the dropwise addition, the three-necked flask was protected from light, and reacted at room temperature for 24 hours to obtain an oxidation product solution; 5 mL of ethy...

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Abstract

The invention discloses a preparation method of a high-tensile elastic cellulose membrane, and belongs to the technical field of food packaging preparation. The preparation method is used in the process of treating crude bamboo fibers by caustic soda, sodium ions in the water solution diffuse towards the surface of the bamboo fibers, the surface of the fiber starts to adsorb the sodium ions, so that pectin of the bamboo fibers and lignin are hydrolyzed and separated out of the bamboo fibers, the bamboo fibers forming ultra-fine hole structure can be softened under the high-temperature processing condition and generate flow under the high pressure, sodium alginate is partially oxidized by sodium periodate, so as to obtain oxidized sodium alginate with aldehyde groups. The method reduces therigidity of the chain, so that the solubility and degradation capability of the sodium alginate in an aqueous solution are improved, in addition, the partially oxidized sodium alginate is introducedwith an active group aldehyde group, and hydrogel can be formed by chemical crosslinking with a high-molecular compound with amino groups and other groups; due to the fact that the outer layer of thecellulose membrane has high biocompatibility, the cellulose membrane is harmless to human health, and can be widely applied to the field of food packaging.

Description

technical field [0001] The invention discloses a preparation method of a high-stretch elastic cellulose film, which belongs to the technical field of food packaging preparation. Background technique [0002] Cellulose membrane is a widely used membrane material, which is widely used in biomedical fields, including medical devices, implant materials, tissue engineering and bioseparation. However, cellulose membranes have limited their applications due to their nonspecific protein adsorption and insufficient biocompatibility. Nonspecific protein adsorption and poor biocompatibility on the membrane surface are extremely important issues when used as implanted biomaterials or used in bioseparation and blood separation. With the development of the economy, people's appreciation level and requirements are also constantly improving. When purchasing edible products, they no longer only pay attention to the internal quality of the products. The appearance quality and visual effects ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D65/38
CPCB65D65/38Y02W90/10Y02A40/90
Inventor 王成何伟仁陈可
Owner BENGBU WEIGUANG PLASTIC PRODS
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