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Edible maize starch preservative film and preparation method thereof

A technology of corn starch and plastic wrap, applied in the field of food fresh-keeping packaging, can solve problems such as hidden health and safety hazards, environmental pollution, and ingestion, and achieve the effects of ensuring health and safety, wide sources of raw materials, and avoiding pollution

Inactive Publication Date: 2014-08-06
吴继礼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the commonly used plastic wraps are made of polyethylene (PE), which is difficult to degrade and easy to cause environmental pollution. After heating, it will decompose harmful substances to the human body. After the human body eats them, they will accumulate in the body, causing safety hazards to health; When food is frozen and kept fresh, it often happens that the plastic wrap sticks to the food and cannot be removed. If you are not careful, you will accidentally eat it, which seriously damages the health of the eater.
[0003] At present, although there is a Chinese patent "Preparation of an Edible Multifunctional Preservative Film" (publication number: CN103289111A) which discloses the method of preparing edible preservative film by casting method using pea starch and peanut protein isolate as raw materials, the cost of pea starch is Higher, not conducive to large-scale industrial production of plastic wrap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation method of edible cornstarch preservative film, comprises the following steps:

[0023] (1) Starch gelatinization: In parts by weight, weigh 180 parts of cornstarch and add it to the reaction kettle, then put in 2000 parts of pure water, heat up to 60°C while stirring, and heat for 1 hour;

[0024] (2) Enzymatic hydrolysis: adjust the pH of the starch gelatinization solution in step (1) to be neutral, add 3 parts of α-amylase after cooling down to 55°C, and add 35 parts of soybean protein and 8 parts of glycerol in sequence after reacting for 0.5 hours , add 0.5 parts of cellulose during stirring, and stir until the reaction solution is evenly mixed;

[0025] (3) Film making: the reaction solution in step (2) is made into a film, dried and then formed into a film to obtain an edible cornstarch preservative film.

Embodiment 2

[0027] A kind of preparation method of edible cornstarch preservative film described in claim 1, comprises the following steps:

[0028] (1) Starch gelatinization: In parts by weight, weigh 210 parts of cornstarch and add it to the reactor, then add 2500 parts of pure water, heat up to 65°C while stirring, and heat for 1.5 h;

[0029] (2) Enzymatic hydrolysis: adjust the pH of the starch gelatinization solution in step (1) to be neutral by pH buffer, add 4.5 parts of α-amylase after cooling down to 57°C, and add 50 parts of soybean protein in turn after 0.7 hours of reaction , 11 parts of glycerin, add 2 parts of sucrose during stirring, and stir until the reaction solution is evenly mixed;

[0030] (3) Film making: the reaction solution in step (2) is made into a film, dried and then formed into a film to obtain an edible cornstarch preservative film.

Embodiment 3

[0032] A kind of preparation method of edible cornstarch preservative film described in claim 1, comprises the following steps:

[0033] (1) Starch gelatinization: by weight, weigh 250 parts of cornstarch and add it to the reaction kettle, then add 3000 parts of pure water, heat up to 70°C while stirring, and heat for 2 hours;

[0034] (2) Enzymatic hydrolysis: adjust the pH of the starch gelatinization solution in step (1) to be neutral by pH buffer, add 6 parts of amylase after cooling down to 60°C, and add 65 parts of soybean protein, 14 parts of Glycerin, add 3.5 parts of cellulose during stirring, and stir until the reaction solution is evenly mixed;

[0035] (3) Film making: the reaction solution in step (2) is made into a film, dried and then formed into a film to obtain an edible cornstarch preservative film.

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PUM

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Abstract

The invention discloses an edible maize starch preservative film and a preparation method thereof, and belongs to the technical field of food preservation packaging. The edible maize starch preservative film comprises the following components in parts by weight: 180-250 parts of corn starch, 35-65 parts of soybean protein, 8-14 parts of glycerinum, 3-6 parts of amylase and 0.5-3.5 parts of dispersant. The invention also discloses the preparation method of the preservative film. The method comprises the following steps: (1) starch dextrinization; (2) enzymolysis; and (3) film preparation. Compared with the prior art, the edible maize starch preservative film and the preparation method have the beneficial effects that the prepared preservative film is easy to degrade, pollution to the environment is avoided, no harmful substance to a human body is generated after being heated, and the health and the safety of an eater are effectively ensured when the preservation film is used for preserving the food.

Description

technical field [0001] The invention relates to a fresh-keeping film and a preparation method thereof, in particular to an edible cornstarch fresh-keeping film and a preparation method thereof, and belongs to the technical field of food fresh-keeping packaging. Background technique [0002] With the improvement of living standards, people pay more and more attention to food safety and hygiene. In daily life, people often use fresh-keeping film and fresh-keeping bags to keep food fresh, especially when heating or freezing food. However, most of the commonly used plastic wraps are made of polyethylene (PE), which is difficult to degrade and easy to cause environmental pollution. After heating, it will decompose harmful substances to the human body. After the human body eats them, they will accumulate in the body, causing safety hazards to health; When food is kept fresh by freezing, it often happens that the plastic wrap sticks to the food and cannot be removed. If you are no...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L89/00C08K5/053
Inventor 吴继礼
Owner 吴继礼