Preparation method of high-solubility waxy maize starch film

A waxy corn starch, high solubility technology, applied in the field of food packaging films, can solve the problems of increased production cost, low tensile strength, large steric hindrance, etc., and achieves increased production cost, improved mechanical properties, and good heat sealing. effect of effect

Active Publication Date: 2016-10-12
JIANGNAN UNIV
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Problems solved by technology

[0003] Starch is divided into amylose and amylopectin. Among them, amylose has a linear structure, and it is easy to interact between molecules and form a film. The film formed has a large degree of crystallinity and high tensile strength, but its solubility is poor; amylopectin is highly branched. , the steric hindrance is large, it is not easy to form a film, and it can only be slowly dried at a low temperature to form a film. The formed film is an amorphous structure with a large elongation at break and good solubility, but the tensile strength is l

Method used

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  • Preparation method of high-solubility waxy maize starch film
  • Preparation method of high-solubility waxy maize starch film
  • Preparation method of high-solubility waxy maize starch film

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Embodiment 1

[0031] The invention provides a kind of preparation method of highly soluble waxy cornstarch film, and concrete steps are as follows:

[0032] (1) Evenly disperse 1.00 g of waxy cornstarch in 99 mL of distilled water, stir in a boiling water bath to pregelatinize, then cook at 121°C for 20 minutes until completely gelatinized, and then cool to room temperature.

[0033] (2) Add 7.5U / g starch isoamylase to the waxy cornstarch after gelatinization for debranching, the reaction temperature is 40°C, and the reaction time is 12h; after complete debranching, the solution that completes the hydrolysis reaction is placed in Boil in a boiling water bath for 10 minutes to inactivate the enzyme, centrifuge at 5000 rpm for 10 minutes to remove the enzyme, and after rotary evaporation at 80°C, freeze-dry to form an amorphous powder to obtain DWMS.

[0034] (3) Mix DWMS with waxy cornstarch, the mixing ratios are 0:100, 8:92, 15:85, 25:75 respectively, prepare a suspension with a concentrat...

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Abstract

The invention discloses a preparation method of a high-solubility waxy maize starch film. The preparation method comprises the following steps: dispersing waxy maize starch into water; carrying out pre-gelatinization to completely gelatinize the starch and then cooling; adding isoamylase and completely debranching; concentrating, freezing and drying to obtain debranched waxy maize starch (DWMS); mixing the DWMS with the waxy maize starch and drying under certain humidity to form a film, so as to prepare the starch film with high mechanical strength and solubility and good heat sealing property and barrier property; the problems that the mechanical property of the waxy maize starch film is relatively weak and the solubility of a starch film with high content of amylose is poor can be solved at the same time. Moreover, in a production process, all used reagents are food-grade reagents so that the high-solubility waxy maize starch film can be used as a good edible food packaging film and is used for packaging instant foods including instant noodle seasonings or instant coffee and the like.

Description

technical field [0001] The invention relates to the technical field of food packaging films, in particular to improving the performance of the waxy cornstarch film by adding debranched waxy cornstarch (DWMS) and a method for preparing the highly soluble waxy cornstarch film. Background technique [0002] With the increasingly prominent environmental problems in today's society and the gradual enhancement of people's awareness of environmental protection, the research on degradable materials using renewable resources such as natural polymers as raw materials has attracted more and more attention. Starch has a wide range of sources, is cheap, and is renewable. The gelatinized starch dilute solution can be dried to form a starch film; and the starch film has low air permeability and good oil resistance, and has become the most promising category of degradable films. It has high application potential. [0003] Starch is divided into amylose and amylopectin. Among them, amylose ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L3/02C08L3/04C08K5/053C08B31/00
CPCC08B31/00C08J5/18C08J2303/02C08J2403/04C08L3/02C08L2201/10C08L2203/162C08L2205/02C08L3/04C08K5/053
Inventor 周星金征宇孟令儒叶小嘉徐学明王韧赵建伟王金鹏
Owner JIANGNAN UNIV
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