Edible soy protein isolate/xylan composite film and method of producing the same

A technology of soybean protein isolate and xylan, which is applied in the field of soybean protein isolate blended modified film products and its preparation, can solve the problems that there are no reports on the preparation method of edible soybean protein isolate/xylan composite film. , to achieve the effect of broadening the application, improving the water and oxygen resistance, and increasing the added value

Inactive Publication Date: 2009-10-07
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0006] So far, there is no report on the preparation meth

Method used

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Embodiment

[0019] According to 10, 9, 8, 7g of soybean protein isolate and 0, 1, 2, 3g of xylan, dissolve them in distilled water, then add 0.5g of glycerin and constant volume with distilled water to obtain a film-forming liquid, and the obtained solution of soybean protein isolate The concentration is 90%, and the concentration of glycerol is 5%. Adjust the pH value of the film-forming solution to 11.0, stir magnetically for 30 minutes, heat in a water bath at 70°C for 30 minutes, and centrifuge at high speed for 1 minute to form a film on a glass plate, dry at 60°C for 6 hours, soften at room temperature for 4 hours, and then peel off the film. The performance parameters are shown in Table 1.

[0020] Table 1. Performance parameters of edible soybean protein isolate / xylan composite film

[0021] Proportion(%)

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Abstract

The invention discloses an edible soy protein isolate/xylan composite film and method of producing the same. The weight percentage content of the soy protein isolate and xylan is (10-5)% and (0-5)%, and the weight percentage content of the plasticiser glycerol adding amount is 0-10%, the light transmittance ratio of the composite film is 50 - 80%, the tensile strength is 1.0-8.0MPa, the elongation at break is 20.0 - 80.0%, the water vapor permeability is 2.0-10.0g*mm/m*d*Pa, and the peroxide number antioxidation performance of the fat is 10.0-50.0Meq/Kg. Adding a xylan will not only makes the composite film have dietary fiber function characteristic, but also the oxygen barrier and the water-blocking film can be improved markedly, respectively improving 4.33-11.46% than the pure soy protein isolate film (for water vapor permeability WVTR characterization) and 5.71-36.97% (to preserve the fat peroxide value POV characterization). The invention has simple method, low cost, and better application prospect in the aspect of the foodstuffs antioxidation.

Description

technical field [0001] The invention belongs to the technical field of soybean protein isolate blended modified membrane product and its preparation. Specifically, the present invention relates to a soybean protein isolate composite membrane containing xylan with health-care functions and better water and oxygen resistance properties and a preparation method thereof. Background technique [0002] With the rapid development of social economy and the enhancement of the public's awareness of green consumption, the environmental pollution caused by a large number of chemical packaging materials (such as polyethylene, cellophane and artificial fibers, etc.) and its own safety have received increasing international attention. In the face of environmental pollution and safety issues, countries all over the world are trying to find various "green packaging" materials to replace chemical packaging materials. In the field of food, the use of plant waste to develop edible film packagi...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08L5/00C08J5/18
Inventor 李海云郝再彬刘丹丹李子院
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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