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Polysaccharide-protein composite membrane and preparation method thereof

A composite membrane and polysaccharide technology, applied in the field of materials and environmental protection, can solve problems such as gaps, and achieve the effects of low preparation cost, simple technology and easy operation, and a wide range of sources.

Inactive Publication Date: 2014-03-05
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the selection of film-forming materials, film-forming mechanism research and process improvement, film performance and quality, and application, there are still many bottlenecks to be solved, and there is still a huge gap with developed countries such as Europe, America and Japan.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] A polysaccharide-protein composite film, comprising the following steps:

[0031] A. Add konjac glucomannan to distilled water, stir and mix at 60°C for 180 minutes, and prepare konjac glucomannan hydrosol with a mass concentration of 2%;

[0032] B. Add soybean protein isolate to distilled water, stir and mix at 90°C for 180 minutes, and prepare a soybean protein isolate dispersion with a mass concentration of 2%; after stirring evenly, adjust the pH to 10.0 with NaOH solution and homogenize to obtain protein dispersion liquid;

[0033] C. Mix the konjac glucomannan hydrosol and the protein dispersion according to the mass ratio of konjac glucomannan hydrosol / protein dispersion = 1:2, stir at 75°C to mix them evenly to obtain a mixed sol;

[0034] D. Cast the mixed sol obtained in the previous step to form a film, and dry to constant weight at 80°C to obtain a polysaccharide-protein composite film.

[0035] The tensile strength of the obtained film was 23.1 MPa.

[...

example 2

[0038] A polysaccharide-protein composite film, comprising the following steps:

[0039] A. Add konjac glucomannan to distilled water, stir and mix at 60°C for 180 minutes, and prepare konjac glucomannan hydrosol with a mass concentration of 2%;

[0040] B. Add soybean protein isolate to distilled water, stir and mix at 90°C for 180 minutes, and prepare a soybean protein isolate dispersion with a mass concentration of 1.5%; after stirring evenly, adjust the pH to 10.0 with sodium acetate solution and homogenize to obtain protein Dispersions;

[0041] C. Mix the konjac glucomannan hydrosol and the protein dispersion according to the mass ratio of konjac glucomannan hydrosol / protein dispersion=3:1, stir at 65°C to make it mix evenly to obtain a mixed sol;

[0042] D. Cast the mixed sol obtained in the previous step to form a film, and dry it to a constant weight at 80°C to obtain a polysaccharide-protein composite film.

[0043] The tensile strength of the obtained film was 26...

example 3

[0046] A polysaccharide-protein composite film, comprising the following steps:

[0047] A. Add konjac glucomannan to distilled water, stir and mix at 60°C for 180 minutes, and prepare konjac glucomannan hydrosol with a mass concentration of 2%;

[0048] B. Add soybean protein isolate to distilled water, stir and mix at 90°C for 180 minutes, and prepare a soybean protein isolate dispersion with a mass concentration of 2%; after stirring evenly, adjust the pH to 11.0 with sodium acetate solution and homogenize to obtain protein Dispersions;

[0049] C. Mix the konjac glucomannan hydrosol and the protein dispersion according to the mass ratio of konjac glucomannan hydrosol / protein dispersion=4:1, stir at 70°C to make it mix evenly to obtain a mixed sol;

[0050] D. Cast the mixed sol obtained in the previous step to form a film, and dry it to constant weight at 60°C to obtain a polysaccharide-protein composite film.

[0051] The tensile strength of the obtained film was 36.2 M...

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Abstract

The invention provides a polysaccharide-protein composite membrane and a preparation method thereof. The polysaccharide-protein composite membrane is prepared from the following raw materials by mass percent: 20-80% of polysaccharide and 80-20% of protein. The method comprises the following steps: by taking plant polysaccharide as a raw material, adding soy isolate protein; carrying out tape casting to form a film after evenly mixing and reacting, and drying at high temperature, so as to obtain the composite membrane. The polysaccharide-protein composite membrane is prepared from natural renewable resources, is wide in material source, safe and non-toxic, has certain moisture-retarding and oxygen-retarding effects, and can be naturally degraded. The materials disclosed by the invention can be applied to packing materials, daily-use chemical industry and farming, forestry and gardening.

Description

technical field [0001] The invention relates to the fields of materials and environmental protection, in particular to a polysaccharide-protein composite membrane and a preparation method thereof. Background technique [0002] In recent years, with the in-depth and extensive research on food preservation film technology, the materials used have gradually developed from some non-edible or nutritious and unsatisfactory materials in the past to edible materials with high nutritional value. , such as polysaccharides, lipids, proteins, etc., which are not only packaging, but also a component of food, which can be completely degraded when discarded in the natural environment after use, thereby preventing environmental pollution. However, when a single polysaccharide or protein is used as a natural polymer food preservation film, there are certain defects in its film formation, hydrophilicity and air permeability of the film, and the mechanical properties of the film cannot meet a ...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08L5/00C08L1/28C08J5/18
Inventor 姜发堂倪学文严文莉肖满
Owner HUBEI UNIV OF TECH
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