Polysaccharide/protein composite film with high barrier property and preparation method thereof

A composite film and high barrier technology, which is applied in the direction of chemical instruments and methods, flat products, other household appliances, etc., can solve the problems of limited application, poor moisture barrier performance, mechanical properties, poor barrier performance, etc., and achieve excellent barrier performance, Improving barrier properties and performing well

Inactive Publication Date: 2020-03-27
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there are a large number of hydroxyl groups and acetyl groups on the glucose and mannose of the konjac glucomannan molecule and its sugar residues, these groups have strong hydrophilic ability, which makes the moisture resistance of the konjac glucomannan-based composite film poor.
The main defects of the composite films reported at present with natural polymers as the main raw material are the poor mechanical properties and barrier properties of the film. The method of performance, the work of obtaining good barrier performance packaging film needs to be solved urgently

Method used

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  • Polysaccharide/protein composite film with high barrier property and preparation method thereof
  • Polysaccharide/protein composite film with high barrier property and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A polysaccharide / protein composite film with high barrier performance and a preparation method thereof, the method comprising the steps of:

[0031] (1) Weigh 1.0 g of konjac glucomannan and 0.15 g of glycerol, add them to 100 mL of water, place in a 60 °C water bath, stir for 90 minutes, and rotate at 800 r / min to fully swell the konjac glucomannan to obtain konjac glucomannan Polysaccharide solution, set aside.

[0032] (2) Weigh 0.25 g of polycarbonate and 0.05 g of acetyl tributyl citrate into 5 mL of dichloromethane, stir at room temperature for 30 min with magnetic force to fully dissolve and disperse the polycarbonate, and obtain the bottom layer solution of polycarbonate. spare.

[0033] (3) Weigh 0.5 g of polycarbonate, 0.1 g of polylactic acid, and 0.12 g of acetyl tributyl citrate into 5 mL of dichloromethane, dissolve with magnetic stirring at room temperature, and stir for 30 min to fully dissolve and disperse the polycarbonate. A polycarbonate / polylactic...

Embodiment 2

[0038] A polysaccharide / protein composite film with high barrier performance and a preparation method thereof, the method comprising the steps of:

[0039] (1) Weigh 0.9 g of konjac glucomannan and 0.18 g of glycerol, add them to 100 mL of water, place in a 60 °C water bath, stir for 90 minutes, and rotate at 800 r / min to fully swell the konjac glucomannan to obtain konjac glucomannan polysaccharide solution.

[0040] (2) Weigh 0.1 g zein and 0.025 g span 80 into 20 mL of 80% ethanol solution, dissolve with magnetic stirring at room temperature, and stir for 30 min to fully dissolve and disperse zein to obtain a zein solution .

[0041] (3) Slowly add the zein solution in (2) to the konjac glucomannan solution in (1) to form a mixed solution, and stir in a water bath at 60 °C for 45 min at a speed of 1200 r / min to obtain konjac glucomannan / zein blend solution.

[0042] (4) Weigh 0.25 g of polycarbonate, 0.025 g of acetyl tributyl citrate and 0.025 g of dibutyl sebacate into ...

Embodiment 3

[0048] A polysaccharide / protein composite film with high barrier performance and a preparation method thereof, the method comprising the steps of:

[0049] (1) Weigh 1.0 g of konjac glucomannan and 0.20 g of glycerol, add them to 100 mL of water, place in a water bath at 60 °C, stir for 90 minutes, and rotate at 800 r / min to fully swell the konjac glucomannan to obtain konjac glucomannan polysaccharide solution.

[0050] (2) Weigh 0.3 g of gluten and 0.03 g of span 80 into 20 mL of pH 12 55% ethanol solution, dissolve with magnetic stirring at 60°C, and stir for 30 min to fully dissolve and disperse the gluten to obtain a gluten solution.

[0051] (3) Slowly add the glutenin solution in (2) to the konjac glucomannan solution in (1) to form a mixed solution, stir in a water bath at 60 °C for 30 min at a speed of 1200 r / min to obtain konjac glucomannan / glutenin Blend the solution.

[0052] (4) Weigh 0.25 g of polycarbonate, 0.025 g of acetyl tributyl citrate and 0.025 g of dib...

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Abstract

The invention discloses a polysaccharide / protein composite film with high barrier property and a preparation method thereof. The preparation method comprises the following steps: preparing one or moreof polycarbonate, polycaprolactone or polylactic acid into a solution, and casting to form a film to obtain a composite film bottom layer; carrying out tape casting on the composite film bottom layerby mixing konjac glucomannan with other polysaccharides or proteins to form a composite film interlayer; and finally, preparing one or more of polylactic acid, polycarbonate or polycaprolactone intoa solution, and casting the solution on the composite film interlayer to form a composite film top layer so as to obtain the biodegradable polysaccharide / protein composite film with high barrier property. The polysaccharide / protein composite film with high barrier property is prepared by using a multilayer tape casting method, the film preparation process is simple, the efficiency is high and thebarrier effect of the composite film is remarkably improved.

Description

technical field [0001] The invention relates to the fields of biodegradable films, packaging, environmental protection and materials, in particular to a polysaccharide / protein composite film with high barrier performance and a preparation method thereof. Background technique [0002] Degradable packaging materials integrate the functions and characteristics of traditional materials, and after completing their mission, through the action of microorganisms and sunlight in the natural environment, they can finally enter the ecological environment in the form of inorganic substances without secondary pollution. It is an inevitable trend in the development of packaging materials to develop degradable packaging materials and gradually reduce and eliminate plastics that cause "white pollution". Natural polymers have rich structures, shapes and functions, and are precious resources and wealth of human beings. Using natural polymers to explore and study environmentally friendly and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B27/36C08J5/18C08L5/00C08L89/00C08L69/00C08L67/04C08K5/11B29C41/22
CPCB29C41/003B29C41/22B29L2007/002B29L2009/00B32B9/00B32B9/045B32B27/36B32B27/365B32B2250/40B32B2307/54B32B2307/546B32B2307/7163B32B2307/73B32B2553/00C08J5/18C08J2305/00C08J2369/00C08J2405/00C08J2467/04C08J2489/00C08K5/053C08K5/11
Inventor 倪学文向飞吴考姜发堂
Owner HUBEI UNIV OF TECH
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