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Wheat bran cellulose/wheat gluten protein compound film and preparing method thereof

A technology of wheat bran and cellulose, which is applied in the field of film preparation and food packaging materials, can solve the problems of environmental pollution, high production cost, white pollution, etc., and achieve the effects of improved mechanical properties, uniform distribution, and improved stability

Inactive Publication Date: 2018-04-06
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a wheat bran cellulose / wheat gluten protein composite film and its Preparation
At the same time, the raw materials of the present invention do not contain substances that are easy to pollute the environment, are friendly to the environment, and will not pollute the environment during the degradation process, providing an effective new way to solve the problem of "white pollution"

Method used

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  • Wheat bran cellulose/wheat gluten protein compound film and preparing method thereof
  • Wheat bran cellulose/wheat gluten protein compound film and preparing method thereof
  • Wheat bran cellulose/wheat gluten protein compound film and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The preparation method of the wheat gluten protein / wheat bran fiber composite film in this example is as follows.

[0058] (1) Weigh 500g of washed and dried wheat bran mixed with 5L of distilled water, boil for 10min, adjust the pH value to 12-13 with 2mol / L sodium hydroxide solution, and then place it in an 80°C water bath for leaching for 4- After 5 hours, centrifuge to obtain a precipitate, which is washed three times with water. Add 2mol / L hydrochloric acid to the washed precipitate, adjust its pH value to 1-2, then place it in a water bath at 60°C for 2-3 hours, filter it with filter cloth while it is hot, and wash the filter residue with water until neutral. Then, the washed filter residue is dehydrated with 75% ethanol solution, dried at 50-55 DEG C, ultrafinely pulverized to obtain wheat bran cellulose, and passed through a 120-mesh sieve for future use.

[0059] (2) Take 24g of wheat gluten protein and dissolve it in 144mL of 30% volume fraction hot ethanol s...

Embodiment 2

[0065] (1) Dissolve 32 g of wheat gluten protein in 192 mL of 20% volume fraction hot ethanol solution, adjust the pH value to 11 with 2 mol / L NaOH and 1 mol / L HCl, and then heat it in a water bath at 80°C for 15 min. Modified to obtain protein film solution. The obtained protein film solution was kept warm in a water bath at 40-45°C, and set aside.

[0066](2) Take 8 g of wheat bran cellulose obtained in the first step in Example 1, dissolve it in 166 mL of distilled water, and use a high-speed disperser to disperse at 10,000 r / min for 5 minutes at a high speed to obtain a dispersed wheat bran fiber liquid. Then, under constant stirring, slowly add the dispersed wheat bran fiber solution into the protein film solution prepared in step 2, and measure 42mL of absolute ethanol to make up the ethanol solution to the same volume fraction as step 2, and again use 2mol / L of NaOH and 1 mol / L of HCl were used to adjust the pH value to 11, and then 6 g of plasticizer glycerin and 0.0...

Embodiment 3

[0071] (1) Take 20 g of wheat gluten protein and dissolve it in 120 mL of 40% volume fraction hot ethanol solution, adjust the pH value to 10 with 2 mol / L NaOH and 1 mol / L HCl, then put it into a 85°C water bath and heat it for 15 min for heating Modified to obtain protein film solution. The obtained protein film solution was kept warm in a water bath at 40-45°C, and set aside.

[0072] (2) Take 20 g of wheat bran cellulose obtained in the first step in Example 1, dissolve it in 168 mL of distilled water, and disperse at 10,000 r / min for 5 minutes at high speed with a high-speed disperser to obtain a dispersed wheat bran fiber liquid. Then, under continuous stirring, slowly add the dispersed wheat bran fiber liquid into the protein film liquid prepared in step 2, and measure 112mL of absolute ethanol to make up the ethanol liquid to the same volume fraction as in step 2, and again use 2mol / L of NaOH and 1 mol / L of HCl were used to adjust the pH value to 10, and then 8 g of p...

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Abstract

The invention discloses wheat bran cellulose / wheat gluten protein compound film and a preparing method thereof, and belongs to the technical field of food package materials. The wheat bran cellulose / wheat gluten protein compound film aims at solving the problem in an existing method for preparing film through agricultural raw materials that the production cost is often high, or environmental pollution cannot be thoroughly solved. Wheat gluten protein and solvent are mainly adopted, wheat bran cellulose, plasticizer, stabilizer and the like are added according to a certain proportion with the assistance of a high pressure homogenizing technology, and the compound film high in mechanical strength, high in water steam blocking performance and high in light screen performance is prepared. Thepreparing method is simple in technology and low in production cost, can be applied to actual production and has high application value. Meanwhile, raw materials do not contain substances easily polluting the environment, and an effective new path is provided for solving the 'white pollution' problem. Besides, the application range of wheat agricultural and sideline products is effectively expanded, and the additional value of wheat processed by-products is increased.

Description

technical field [0001] The invention relates to the field of film preparation, especially the field of food packaging materials, in particular to a wheat bran cellulose / wheat gluten protein composite film and a preparation method thereof. The composite film prepared by the invention has the advantages of high mechanical strength, good water vapor barrier performance and light barrier performance, and low production cost, can meet the needs of industrialized large-scale production and application, and has good application prospects. Background technique [0002] As an important material for traditional food packaging, plastic has the advantages of light weight, waterproof, durable, mature production technology and low cost. With the extensive development and application of synthetic plastics, about 30% of plastics are used in the food packaging industry, such as polyethylene (PE), polypropylene (PP), polyvinylidene chloride (PVDC), etc. However, the existing synthetic plasti...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08L1/02C08J5/18B29D7/01C08H1/00
CPCB29D7/01C08H1/00C08J5/18C08J2301/02C08J2389/00C08J2401/02C08J2489/00
Inventor 张志清余国贤肖力源吴贺君周敏陈安均申光辉黎杉珊罗擎英刘兴艳李美良
Owner SICHUAN AGRI UNIV
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