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Transparent gas barrier film materials and production method thereof

A technology of gas barrier and film materials, which is applied in the field of transparent gas barrier film materials and its preparation, can solve the problems of limited room for improvement in the oxygen barrier performance of composite oxygen barrier packaging films, restrictions on the application expansion of packaging materials, and irregular properties, etc., to achieve Meet the effect of environmental protection and sustainable development, simple environmental protection and sustainable development, excellent air tightness performance

Active Publication Date: 2015-08-05
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the oxygen barrier properties of plastic packaging materials added with inorganic substances have been widely studied, and it has been proved experimentally and theoretically that inorganic layered materials can effectively prolong the diffusion path of oxygen molecules, but the current production process of oxygen barrier packaging materials For example, steamed bun technology, plasma treatment coating and sol-gel method have high technical requirements, and the process is complex and precise, which restricts the application expansion of barrier packaging materials
In addition, most of the currently synthesized inorganic layered materials have irregular properties and are easy to agglomerate, resulting in a limited space for the oxygen barrier performance of the composite oxygen barrier packaging film, which is a bottleneck for improving the barrier performance of the material.
Therefore, there are still many difficulties and challenges in the pursuit of high barrier composite film materials

Method used

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  • Transparent gas barrier film materials and production method thereof
  • Transparent gas barrier film materials and production method thereof
  • Transparent gas barrier film materials and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A. Weigh 5.1282g Mg(NO 3 ) 2 ·6H 2 O, 3.7513g Al(NO 3 ) 3 9H 2 Dissolve O in 50ml of deionized water, weigh 4.0000g of urea and dissolve in 50ml of deionized water, mix the prepared nitrate mixed solution with the prepared urea solution, stir, and crystallize at 110°C for 24 hours. 2 The deionized hot water is centrifugally washed to neutrality to obtain the precursor of hydrotalcite nanosheets;

[0029] B. configuration mass concentration is the chitosan solution of 4%, fully dispersed in the 50mL chitosan solution by obtaining 1g hydrotalcite nanosheet in A step;

[0030] C. Clean the polytetrafluoroethylene filter membrane with a thickness of 0.1 mm and a pore size of 50 mesh with ethanol for 30 minutes, and finally clean it with deionized water to obtain a hydrophilic filter membrane for use;

[0031] D. Put 5cm 2 The hydrophilic filter membrane treated in the C step is placed at the bottom of the funnel, then the 35ml hydrotalcite and chitosan mixed solution...

Embodiment 2

[0034] A. Weigh 5.1282g Mg(NO 3 ) 2 ·6H 2 O, 3.7513g Al(NO 3 ) 3 9H 2 Dissolve O in 50ml of deionized water, weigh 4.0000g of urea and dissolve it in 50ml of deionized water, mix the prepared nitrate mixed solution with the prepared urea, stir, and crystallize at 110°C for 24 hours. 2 deionized hot water centrifugal washing to neutral to obtain hydrotalcite nanosheet precursor;

[0035] B. configuration concentration is the polyvinyl alcohol solution of 3.5% concentration fraction, fully disperses in 80mL polyvinyl alcohol solution in the 2g hydrotalcite nanoplate that obtains in A step;

[0036] C. Clean the base polytetrafluoroethylene filter membrane with a thickness of 0.1 mm and a pore size of 100 mesh with ethanol for 30 minutes, and finally clean it with deionized water to obtain a hydrophilic filter membrane for use;

[0037] D. Put 5cm 2 The hydrophilic filter membrane treated in step C is placed at the bottom of the funnel, and then 50ml of the mixed solution ...

Embodiment 3

[0040] A. Weigh 5.1242g Mg(NO 3 ) 2 ·6H 2 O, 3.5413g Al(NO 3 ) 3 9H 2 Dissolve O in 50ml of deionized water, weigh 3.900g of urea and dissolve in 50ml of deionized water, mix the prepared nitrate mixed solution with the prepared urea solution, stir, crystallize at 110°C for 24 hours, and remove CO 2 deionized hot water centrifugal washing to neutral to obtain hydrotalcite nanosheet precursor;

[0041] B. configuration concentration is the carboxymethyl cellulose solution of 3.5% concentration fraction, fully disperse in 80mL carboxymethyl cellulose solution in the 0.8g hydrotalcite nanosheet obtained in A step;

[0042] C. Clean the base polytetrafluoroethylene filter membrane with a thickness of 0.1 mm and a pore size of 120 mesh with ethanol for 30 minutes, and finally clean it with deionized water to obtain a hydrophilic filter membrane for use;

[0043] D. Put 5cm 2 The hydrophilic filter membrane treated in the C step is placed at the bottom of the funnel, and then...

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Abstract

The invention discloses transparent gas barrier film materials and a production method thereof. A large length-diameter ratio of hydrotalcite nano-sheet serves as a precursor, the hydrotalcite whish is of a two-dimensional layered structure and various commercial packaging polymer raw materials are composited into a film by a simple suction filter deposition film forming technology, a diffusion path of gas molecules in the composite film can be significantly extended due to the large length-diameter ratio and the two-dimensional ordered structure of the hydrotalcite, and accordingly the barrier performance of the film materials is further improved. The finally produced transparent gas barrier film is ultra-low in oxygen transmissibility in comparison with a detection limit of an instrument and accordingly the problem that the requirement of the current barrier packaging field for the oxygen resistance performance of materials is high can be solved. According to the suction filter deposition film forming method, the production is simple, the raw material sources are wide, the material selection is convenient, the cost is low, and the environment-friendly and sustainable development requirements are met in comparison with the traditional method and accordingly the transparent gas barrier film materials comprise the potential application value in the fields of food, medicine packaging, electronic device packaging and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic organic composite thin film functional materials, in particular to a transparent gas barrier thin film material and a preparation method thereof. Background technique [0002] The storage of food and medicine and the sealing during electronic display require packaging materials to have excellent oxygen barrier properties, so high oxygen barrier packaging materials play an important application value in people's daily life. With the development of the economy, the growth of social demand and the increase of import and export trade, people's requirements for packaging materials are getting higher and higher. It is precisely because the barrier film acts as a barrier to oxygen that the storage life or shelf life of its products can be extended. As the main material of sales packaging, plastic oxygen barrier film has gradually replaced traditional glass, metal, paper and other packaging materials. ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/08C08L29/04C08L1/12C08L1/28C08K3/26
Inventor 卫敏豆义波韩景宾刘小西潘婷周阿武段雪
Owner BEIJING UNIV OF CHEM TECH
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