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Preparation method of soybean protein isolate and modified zein composite film

A technology of zein and soybean protein isolate, applied in flexible coverings, climate sustainability, sustainable manufacturing/processing, etc., can solve the problem of low soybean protein addition and no significant improvement in the mechanical strength of the composite film To achieve the effect of improving mechanical properties and moisture resistance, strengthening bonding, and improving solubility

Active Publication Date: 2017-02-15
SHENYANG NORMAL UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Current technology such as: In 2010, Cai Huazhen and others adopted this method in the "Research on Edible Composite Protein Film Film Forming Conditions", but the amount of soybean protein added is relatively low, and the mechanical strength of the composite film has not been greatly improved. The problem

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  • Preparation method of soybean protein isolate and modified zein composite film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] refer to figure 1 , the preparation method of soybean protein isolate and modified zein composite film, the concrete realization steps are as follows:

[0025] a. Preparation of protein complex solution by solution blending method

[0026] (1) Get 7g of soybean protein isolate and dissolve it in 100mL distilled water to make soybean protein isolate liquid, get 7g of phosphorylated zein and dissolve it in 100mL distilled water to make phosphorylated zein liquid;

[0027] (2) The above-mentioned phosphorylated zein solution is modified by microwave, and the volume of the solution remains unchanged before and after microwave, and then mixed with the soybean protein isolate solution, wherein the phosphorylated zein solution modified by microwave The volume ratio of the protein liquid to the isolated soybean protein liquid is 1:2, add absolute ethanol accounting for 40% of the volume of the mixed liquid, and stir evenly to obtain the protein complex liquid;

[0028] b. Add...

Embodiment 2

[0041] The preparation method of soybean protein isolate and modified zein composite film, the specific realization steps are as follows:

[0042] The difference with Example 1 is:

[0043] a. Preparation of protein complex solution by solution blending method

[0044] (1) Get 8g of soybean protein isolate and dissolve it in 100mL distilled water to make soybean protein isolate liquid, get 8g of phosphorylated zein and dissolve it in 100mL distilled water to make phosphorylated zein liquid;

[0045] (2) The above-mentioned phosphorylated zein solution is modified by microwave, and the volume of the solution remains unchanged before and after microwave, and then mixed with the soybean protein isolate solution, wherein the phosphorylated zein solution modified by microwave The volume ratio of the protein solution to the isolated soybean protein solution is 1:3, adding absolute ethanol accounting for 40% of the volume of the mixed solution, and stirring evenly to obtain the prot...

Embodiment 3

[0055] The preparation method of soybean protein isolate and modified zein composite film, the specific realization steps are as follows:

[0056] The difference with Example 1 is:

[0057] a. Preparation of protein complex solution by solution blending method

[0058] (1) Get 9g of soybean protein isolate and dissolve it in 100mL distilled water to make soybean protein isolate liquid, get 9g of phosphorylated zein and dissolve it in 100mL distilled water to make phosphorylated zein liquid;

[0059] (2) The above-mentioned phosphorylated zein solution is modified by microwave, and the volume of the solution remains unchanged before and after microwave, and then mixed with the soybean protein isolate solution, wherein the phosphorylated zein solution modified by microwave The volume ratio of the protein solution to the soybean protein isolate solution is 1:4, add absolute ethanol accounting for 30% of the volume of the mixed solution, and stir evenly to obtain the protein comp...

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Abstract

The preparation method of the composite film of soybean protein isolate and modified zein mainly aims at the problems that the existing protein film formed by a single component has limitations in performance and the mechanical strength of the composite film is low, and provides a soybean protein isolate and A method for preparing a modified zein composite film. The specific steps of the preparation method are: a. preparing protein complex solution by solution blending method; b. adding plasticizer and cross-linking agent; c. adjusting pH value to make the solution alkaline; d. heating in water bath; e. constant temperature Dry to prepare protein film. The invention has wide sources of raw materials and low cost, and the prepared protein composite film is pollution-free and degradable after being discarded, has high mechanical properties and strong barrier properties, and overcomes the performance limitations of the protein film formed by a single component. The development prospect in the field of food packaging is very broad.

Description

technical field [0001] The invention relates to a preparation method of a composite film of soybean protein isolate and modified zein, belonging to the field of polymer material processing. Background technique [0002] With the advancement of science and technology and the improvement of people's living standards, the requirements for food packaging materials are becoming increasingly stringent. Traditional petrochemical products - plastics, because they cannot be biodegraded, will cause environmental pollution and cause serious ecological problems. In recent years, protein films have gradually become one of the research hotspots at home and abroad because of their biodegradability, edibility, nutritional properties and some good properties (such as oil resistance properties). [0003] The protein film formed by a single component has certain limitations in performance. The development of composite protein films is the current development trend. Different types of proteins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L89/00C08L71/08C08L5/02C08K5/053C08H1/00B65D65/46
CPCY02A40/90Y02W90/10
Inventor 肖志刚王娜杨庆余王鹏高育哲曹慧英朱旻鹏段玉敏于金平
Owner SHENYANG NORMAL UNIV