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A fully degradable waterproof food packaging material and its preparation method

A packaging material, a complete degradation technology, applied in the field of organic polymer material preparation, can solve the problems of poor biodegradability, difficult to recycle, etc., to achieve the effect of improving the degree of compactness, compact structure, and improving waterproof ability

Active Publication Date: 2018-10-09
湖南耐力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a completely degradable waterproof food packaging material and its preparation method for the problems of poor biodegradability and difficult recycling of traditional waterproof food packaging materials.

Method used

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  • A fully degradable waterproof food packaging material and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of the fully degradable waterproof food packaging material of the present embodiment is as follows:

[0025] (1) Disperse 5.0g bacterial cellulose fibers (polymerization degree 1500~2000, molecular weight 250000~300000) in 500g absolute ethanol, and prepare 504g uniformly dispersed bacterial cellulose through 80MPa high-pressure homogenization treatment twice Fiber dispersion system;

[0026] (2) Add 1.0g microcrystalline cellulose (microcrystalline cellulose particle size is 20μm~50μm, polymerization degree is 200~220) into 100g distilled water, add 0.2g acetic anhydride and 2.5 g concentrated sulfuric acid for surface modification, after 6 hours of treatment, the microcrystalline cellulose was washed with distilled water to neutrality, and after vacuum filtration, the filter cake was dried at 40°C for 48 hours to obtain 1.1 g of modified microcrystalline cellulose particles. The mechanical stirring speed in the modification process is 120r / min;...

Embodiment 2

[0031] The preparation method of the fully degradable waterproof food packaging material of the present embodiment is as follows:

[0032] (1) Disperse 7.0g bacterial cellulose fibers (polymerization degree 1500~2000, molecular weight 250000~300000) in 700g absolute ethanol, and prepare 705g uniformly dispersed bacterial cellulose through 80MPa high-pressure homogenization treatment twice Fiber dispersion system;

[0033](2) Take 3.0g microcrystalline cellulose (microcrystalline cellulose particle size is 20μm~50μm, polymerization degree is 200~220) and add it to 200g distilled water, add 0.6g acetic anhydride and 7.5 g of concentrated sulfuric acid for surface modification, after 6 hours of treatment, the microcrystalline cellulose was washed to neutrality with distilled water, and after vacuum filtration, the filter cake was dried at 45°C for 48 hours to obtain 3.2 g of modified microcrystalline cellulose particles. The mechanical stirring speed in the modification process ...

Embodiment 3

[0038] The preparation method of a kind of fully degradable waterproof food packaging material of the present embodiment is as follows:

[0039] (1) Take 6.0g bacterial cellulose fiber (polymerization degree is 1500~2000, molecular weight is 250000~300000) and disperse it in 600g absolute ethanol, after 80MPa high pressure homogeneous treatment twice to prepare 603g uniformly dispersed bacterial cellulose Fiber dispersion system;

[0040] (2) Add 10.0g microcrystalline cellulose (microcrystalline cellulose particle size is 20μm~50μm, polymerization degree is 200~220) into 500g distilled water, add 2g acetic anhydride and 25g concentrated Sulfuric acid was used for surface modification. After 6 hours of treatment, the microcrystalline cellulose was washed with distilled water to neutrality. After vacuum filtration, the filter cake was dried at 42°C for 48 hours to obtain 10.3 g of modified microcrystalline cellulose particles. The mechanical stirring speed in the process is 12...

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Abstract

The invention discloses a completely degraded waterproof food packaging material and a preparation method thereof. The packaging material is a network structure matrix prepared from bacterial cellulose fibers and microcrystalline cellulose particles through crosslinking. Through filling a gap structure of the matrix with soy protein isolate, the cross-linked network water resistance is improved. The preparation method comprises bacterial cellulose fiber dispersed system preparation, surface modification of the microcrystalline cellulose, preparation of a bacterial cellulose fiber-microcrystalline cellulose mixture, and preparation of the completely degraded waterproof food packaging material. After the packaging material is immersed in distilled water at a temperature of 40 DEG C for 12h, a water absorption ratio is less than 5.0%. The preparation method is simple. Through use of soy protein isolate filling the cross-linked network gap, hydroxyl of the cellulose structure can be protected, the surface energy of the packaging material is reduced, the packaging material structure is more compact and the waterproof ability is improved. The packaging material can be completely degraded and has good recyclability.

Description

technical field [0001] The invention belongs to the technical field of preparation of organic polymer materials, and in particular relates to a network structure formed by cross-linking bacterial cellulose fibers and microcrystalline cellulose particles as a matrix, and then filling soybean protein isolate into the gaps thereof A completely degradable waterproof packaging material for food and a preparation method thereof are formed. Background technique [0002] At present, the main waterproof food packaging material is plastic, which has outstanding advantages such as good water resistance and high strength. However, plastic packaging materials are difficult to achieve natural degradation, which does not conform to the sustainable development concept of green environmental protection. Therefore, the development of a cellulose-based paper food packaging material with outstanding waterproof performance can not only meet the needs of the packaging industry, but also meet the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L1/04C08L89/00C08B15/02
CPCC08B15/02C08L1/02C08L2201/06C08L2205/03C08L1/04C08L89/00
Inventor 辛长征张浩王莉周丰伟庄洛新
Owner 湖南耐力科技有限公司
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