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Chestnut shell extract-containing soy protein isolate-based film and preparation method thereof

A technology of soybean protein isolate and chestnut shell, applied in the field of soybean protein isolate film and its preparation, can solve the problems of low strength of soybean protein isolate film, achieve good mechanical properties, improve utilization rate, and improve mechanical properties

Inactive Publication Date: 2014-11-19
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problem of low strength of the existing soybean protein isolate film, and provides a soybean protein isolate film containing chestnut shell extract and a preparation method thereof

Method used

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  • Chestnut shell extract-containing soy protein isolate-based film and preparation method thereof
  • Chestnut shell extract-containing soy protein isolate-based film and preparation method thereof

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specific Embodiment approach 1

[0021] Specific embodiment one: the soybean protein isolate film containing chestnut shell extract of the present embodiment is made of soybean protein isolate powder, chestnut shell extract and glycerin, wherein the quality of chestnut shell extract is 2 times that of soybean protein isolate powder % to 15%, and the quality of glycerin is 10% to 30% of the soybean protein isolate powder.

[0022] The soy protein isolate film containing chestnut shell extract in this embodiment is a flexible and transparent film with certain tensile strength and good elongation, and can absorb ultraviolet light and has certain oxidation resistance.

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that the quality of the chestnut shell extract is 3% to 8% of the soybean protein isolate powder, and the quality of glycerin is 15% to 20% of the soybean protein isolate powder. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: the preparation method of the soybean protein isolate film that contains chestnut shell extract described in specific embodiment one, carry out according to the following steps:

[0025] 1. After the chestnut shell is crushed, put the chestnut shell powder into water according to the weight percentage of chestnut shell and water as 1:8-15, heat to 80-100°C and stir for 1-2 hours; Centrifuge and separate with a centrifuge, add the supernatant to a rotary evaporator and concentrate until the solution is viscous, and then place it in a vacuum drying oven to dry to constant weight to obtain chestnut shell extract;

[0026] 2. Weigh soybean protein isolate powder, chestnut shell extract and glycerin, wherein the quality of chestnut shell extract is 2% to 15% of soybean protein isolate powder, and the quality of glycerin is 10% to 30% of soybean protein isolate powder; Dissolve soybean protein isolate powder in water to obtain a protein solution; ad...

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Abstract

The invention relates to a chestnut shell extract-containing soy protein isolate-based film and a preparation method thereof. The chestnut shell extract-containing soy protein isolate-based film solves the technical problem that the existing soy protein isolate-based film has low strength. The chestnut shell extract-containing soy protein isolate-based film is prepared from soy protein isolate powder, chestnut shell extract and glycerin. The preparation method comprises the following steps of dissolving the soy protein isolate powder in water to obtain a protein solution, dissolving the chestnut shell extract in water to obtain an extract solution, adding the extract solution and glycerin into the protein solution, carrying out homogenization emulsification to obtain a homogenate, adjusting a pH value of the homogenate, carrying out heating, carrying out cooling to obtain a film-forming solution, carrying out curtain coating on a substrate by the film-forming solution, and carrying out curing drying to obtain the chestnut shell extract-containing soy protein isolate-based film. The chestnut shell extract-containing soy protein isolate-based film has film tensile strength of 1.34-2.17MPa, breaking elongation of 185-217% and an oxygen permeation rate of 0.43-2.4cc / (m<2>. day) and can be used as a food package material.

Description

technical field [0001] The invention relates to a soybean protein isolate film and a preparation method thereof. Background technique [0002] In recent years, with the continuous enhancement of people's awareness of environmental protection, edible packaging films that are biodegradable and non-environmentally polluting have received widespread attention. However, due to the food safety problems caused by various additives added to food, more and more people expect to solve this problem by improving and improving the performance of food packaging materials. Soybean protein isolate is produced from low-temperature desolvated soybean meal. The protein content is above 90%. It has good film-forming properties and can be formed with certain flexibility. It has good oxygen and aromatic substances under a certain humidity. Transparent film with oil and grease barrier properties. However, the tensile strength of the film is 15MPa-18MPa, and the elongation is only 3%-5%. The drie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L89/00C08K5/053C08K5/1545C08J5/18
Inventor 王立娟王海霞
Owner NORTHEAST FORESTRY UNIVERSITY
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