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A kind of preparation method of biodegradable food packaging material

A food packaging and biodegradation technology, applied in the field of composite material preparation, can solve the problems of waste distiller's grain residues polluting the environment, low resource utilization rate, etc., and achieve the effects of promoting resource recycling, reducing production costs, and enhancing adsorption performance

Active Publication Date: 2019-02-01
盐城钻梦环保科技有限公司
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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 method for preparing biodegradable food packaging materials. By reusing waste distiller's grains and adding specific modifiers to modify its surface, it becomes biodegradable. materials, reduce the cost of packaging materials, and solve the problems of waste distiller's residue polluting the environment and low resource utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation steps are as follows:

[0034] S1: Wash the anaerobic cassava distiller's grains, air-dry them naturally, and pass through a 20-mesh sieve to remove fine dust and large particles of impurities.

[0035] S2: Place the distiller's grains prepared in S1 in a vacuum drying oven, dry at 80° C. for 4 hours, then pulverize with a high-speed universal grinder until there are no large particles, and pass through a 40-mesh sieve.

[0036] S3: dissolving the distiller's grains prepared in step S2 in the LiCl / DMAC solvent system, wherein the LiCl mass concentration is 10%, and the distiller's grains account for 6% by mass in the solvent system. At room temperature, use an electric stirrer 2000r / min Stir for 10min to dissolve the cellulose and obtain a homogeneous solution.

[0037] S4: Add the composite modifier of lauric acid, di(dioctyl phosphate) ethylene titanate and polyethylene glycol to the homogeneous solution obtained in step S3, lauric acid, di(dioctyl p...

Embodiment 2

[0045] The preparation steps are as follows:

[0046] S1: Wash the anaerobic cassava distiller's grains, air-dry them naturally, and pass through a 20-mesh sieve to remove fine dust and large particles of impurities.

[0047] S2: Place the distiller's grains prepared in S1 in a vacuum drying oven, dry at 80° C. for 4 hours, then pulverize with a high-speed universal grinder until there are no large particles, and pass through a 40-mesh sieve.

[0048] S3: Dissolve the distiller's grains prepared in step S2 in the LiCl / DMAC solvent system, wherein the LiCl mass concentration is 10%, and the distiller's grains in the solvent system account for a mass fraction of 6%. Stir for 10 min to dissolve the cellulose and obtain a homogeneous solution.

[0049] S4: Add the composite modifier of lauric acid, di(dioctyl phosphate) ethylene titanate and polyethylene glycol to the homogeneous solution obtained in step S3, lauric acid, di(dioctyl phosphate) ethyl titanate The amounts of diester...

Embodiment 3

[0057] The preparation steps are as follows:

[0058] S1: Wash the anaerobic cassava distiller's grains, air-dry them naturally, and pass through a 20-mesh sieve to remove fine dust and large particles of impurities.

[0059] S2: Place the distiller's grains prepared in S1 in a vacuum drying oven, dry at 80° C. for 4 hours, then pulverize with a high-speed universal grinder until there are no large particles, and pass through a 40-mesh sieve.

[0060] S3: Dissolve the distiller's grains prepared in step S2 in the LiCl / DMAC solvent system, wherein the LiCl mass concentration is 10%, and the distiller's grains in the solvent system account for a mass fraction of 6%. Stir for 10 min to dissolve the cellulose and obtain a homogeneous solution.

[0061] S4: Add the composite modifier of lauric acid, di(dioctyl phosphate) ethylene titanate and polyethylene glycol to the homogeneous solution obtained in step S3, lauric acid, di(dioctyl phosphate) ethyl titanate The amount of dieste...

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PUM

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Abstract

The invention discloses a preparing method of a biodegradable food packaging material, and belongs to the technical field of preparing packaging materials. Discarded anaerobic cassava distillers' grains are reused, dissolved through a cellulose dissolving system and modified with a lauric acid, bi(dioctyl phosphate) diethylene titanate and polyethylene glycol composite modifying agent, auxiliaries such as specific dispersant, toughener, plasticizer and stabilizer are added, and the biodegradable food packaging material is prepared through extrusion granulation of a double-screw extruder and hot press molding of a press vulcanizer. Tenacity, tensile strength, impact strength and other performance of the biodegradable food packaging material prepared through the preparing method meet the packaging requirement, material cost is greatly reduced, and comprehensive utilization of waste resources is achieved.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a method for preparing biodegradable food packaging materials by using cassava distiller's grains. Background technique [0002] Guangxi has abundant cassava resources, and the planting area and output of cassava rank first in the country. After cassava is used in the production of starch and alcohol, a large amount of waste—cassava distiller's grains will be produced. Its main components are polymer compounds such as cellulose, hemicellulose, and lignin, and the fiber content is more than 70%. At present, cassava distiller's grains are partially used in the production of biological feed and chemical fertilizers, and most of the rest are discarded, which not only causes waste of biomass resources, but also causes environmental pollution. If it can be properly treated and applied to the preparation of environmentally friendly chemical materials,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L67/04C08K13/02C08K3/26C08K5/11
CPCC08L1/02C08L67/04C08L2201/06C08L2205/03C08K13/02C08K2003/265C08K5/11
Inventor 黄丽婕陈杰古碧谢彩锋王晓彤周雷黄崇杏
Owner 盐城钻梦环保科技有限公司
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