A fully degradable waterproof packaging material and its preparation method

A completely degradable and packaging material technology, applied in the field of organic polymer material preparation, can solve the problems of poor biodegradability and difficult recycling, achieve good biodegradability, simple preparation method, and improve waterproof ability

Active Publication Date: 2018-09-11
长春市蓝月环保材料有限公司
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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 packaging material and its preparation method for the problems of poor biodegradability and difficult recycling of traditional waterproof packaging materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the fully degradable waterproof food packaging material of the present embodiment is as follows:

[0026] (1) Disperse 4.0g bacterial cellulose (polymerization degree 1500~2000, molecular weight 250000~300000) in 400g absolute ethanol, and prepare 402g uniformly dispersed bacterial cellulose fibers through 80MPa high-pressure homogenization treatment twice - anhydrous ethanol system;

[0027] (2) Add 2.0g of microcrystalline cellulose (particle size 20μm~50μm, polymerization degree 200~220) into 200g of distilled water, and add 1.0g of acetic anhydride and 5.0g of concentrated sulfuric acid successively under the condition of heating in a water bath at 60°C. Surface modification. After 6 hours of treatment, the modified microcrystalline cellulose was washed to neutrality with distilled water, and then dried at 40°C for 48 hours to obtain 2.1 g of modified microcrystalline cellulose particles. The mechanical stirring speed during the whole modif...

Embodiment 2

[0033] The preparation method of the fully degradable waterproof food packaging material of the present embodiment is as follows:

[0034] (1) Disperse 5.0g of bacterial cellulose (polymerization degree 1500~2000, molecular weight 250000~300000) in 500g of absolute ethanol, and prepare 503g of uniformly dispersed bacterial cellulose fibers through 80MPa high-pressure homogenization treatment twice - anhydrous ethanol system;

[0035] (2) Add 4.0g microcrystalline cellulose (particle size 20μm~50μm, polymerization degree 200~220) into 200g distilled water, add 2.0g acetic anhydride and 10.0g concentrated sulfuric acid successively under the condition of 60℃ water bath heating Surface modification, after 6 hours of treatment, the microcrystalline cellulose was washed to neutral with distilled water, and then dried at 45°C for 48 hours to obtain 4.1g of modified microcrystalline cellulose particles. The mechanical stirring speed during the whole modification process was 120r / mi...

Embodiment 3

[0041] The preparation method of the fully degradable waterproof food packaging material of the present embodiment is as follows:

[0042] (1) Disperse 7.0g of bacterial cellulose (polymerization degree 1500~2000, molecular weight 250000~300000) in 700g of absolute ethanol, and prepare 704g of uniformly dispersed bacterial cellulose fibers through 80MPa high-pressure homogenization treatment twice - anhydrous ethanol system;

[0043] (2) Add 8.0g microcrystalline cellulose (particle size 20μm~50μm, polymerization degree 200~220) into 400g distilled water, add 4.0g acetic anhydride and 20.0g concentrated sulfuric acid successively under the condition of 60℃ water bath heating Surface modification, after 6 hours of treatment, the microcrystalline cellulose was washed with distilled water to neutrality, and then dried at 42°C for 48 hours to obtain 8.2g of modified microcrystalline cellulose particles. The mechanical stirring speed during the whole modification process was 120r / ...

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Abstract

The invention discloses a completely degradable waterproof packaging material and a method for preparing the same. Network structure matrixes which are formed by bacterial cellulose fibers and microcrystalline cellulose particles are filled with cross-linking type soybean glue, and hot-press treatment is carried out to obtain the completely degradable waterproof packaging material. The method mainly includes five preparation steps of preparing bacterial cellulose fiber-absolute ethyl alcohol systems; modifying the surfaces of microcrystalline celluloses; preparing bacterial cellulose fiber-microcrystalline cellulose mixtures; synthesizing the cross-linking type soybean glue; preparing a packaging material and the like. The completely degradable packaging material and the method have the advantages that the water absorption of the completely degradable waterproof packaging material can be lower than 8.0% after the completely degradable waterproof packaging material is soaked in distilled water at the temperature of 60 DEG C for 24 h; the cross-linking soybean glue is added into the bacterial cellulose fiber-microcrystalline cellulose mixtures, accordingly, the density of molecular chains in the structure of the completely degradable waterproof packaging material can be obviously improved, and the completely degradable waterproof packaging material is good in water-resistant performance on the basis that the environmental protection performance and the degradation performance of the completely degradable waterproof packaging material are unaffected.

Description

technical field [0001] The invention belongs to the technical field of preparation of organic polymer materials, in particular, it relates to a method of filling cross-linked bean gum into a network structure matrix formed by bacterial cellulose fibers and microcrystalline cellulose particles, and then undergoing hot-pressing treatment. An environment-friendly, non-toxic, completely degradable waterproof packaging material and a preparation method thereof are formed. Background technique [0002] Waterproof packaging materials can prevent food, medicine, electrical appliances, textiles, etc. from being degraded due to moisture during transportation and sales. [0003] Coating materials with the ability to isolate moisture on the surface of packaging materials can obtain obvious waterproof performance [Kang Liu, Hua Yuan, Mu Jun, Chu Demiao, Nano-SiO 2 Effect of Hydrophobic Coating on the Properties of Paper and Paperboard, Packaging Engineering, No. 9, 2016; Lai Xiaojuan, G...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L1/04C08L1/12C08L89/00
CPCC08L1/02C08L2201/06C08L2205/02C08L2205/035C08L1/04C08L1/12C08L89/00
Inventor 张浩辛长征洪亮楚高利朱明
Owner 长春市蓝月环保材料有限公司
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