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Preparation method of biodegradable emulsion film material

A biodegradable and membrane material technology, applied in the field of preparation of biodegradable emulsion membrane materials, can solve the problems of unstable structure of emulsion membrane materials, poor water vapor barrier properties, weak mechanical strength, etc. Improved barrier properties and strong mechanical properties

Inactive Publication Date: 2013-10-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new type of biodegradable emulsion film material for the disadvantages of poor water vapor barrier performance and weak mechanical strength of protein film materials and the unstable structure and poor mechanical properties of emulsion film materials prepared by traditional high-speed dispersion homogeneity preparation method

Method used

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  • Preparation method of biodegradable emulsion film material
  • Preparation method of biodegradable emulsion film material
  • Preparation method of biodegradable emulsion film material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The first step gelatin is prepared into a 5% (w / w) aqueous solution, and the pH is adjusted to 8.0 after fully hydrating, and 40% (w / w gelatin) glycerin and 20% (w / w gelatin) olive oil are added;

[0022] The second step is to pre-homogenize the material obtained in step 1 with a high-speed disperser at a speed of 6000rpm, homogenize for 5 minutes, and then use a micro-jet nano-homogenizer for second homogenization, the conditions are: 150MPa, 1 cycle;

[0023] The third step is to degas the film-forming liquid obtained in step 2 under a vacuum of 0.8MPa for 3 minutes, measure 45ml of film-forming liquid and pour it into a plexiglass box, and place it in a constant temperature and humidity box at 25°C and 40% RH to dry for 36 hours. Obtain emulsion film material;

[0024] In this example, performance tests were also carried out on the emulsion membrane materials obtained under different homogenization conditions. The pre-homogenization time was 5 minutes and 3 minutes r...

Embodiment 2

[0029] The first step gelatin is prepared into a 5% (w / w) aqueous solution, and the pH is adjusted to 8.0 after fully hydrating, and 40% (w / w gelatin) glycerin and 20% (w / w gelatin) olive oil are added;

[0030] The second step is to pre-homogenize the material obtained in step 1 with a high-speed disperser at a speed of 20,000 rpm for 5 minutes, and then use a micro-jet nano-homogenizer for secondary homogenization under the following conditions: 150MPa, 1 cycle;

[0031] The third step is to degas the film-forming liquid obtained in step 2 under a vacuum of 0.8MPa for 3 minutes, measure 45ml of film-forming liquid and pour it into a plexiglass box, and place it in a constant temperature and humidity box at 25°C and 40% RH to dry for 36 hours. Obtain emulsion film material;

[0032] In this example, performance tests were also carried out on the emulsion membrane materials obtained under different homogenization conditions. The pre-homogenization time was 5 minutes and 3 minu...

Embodiment 3

[0037] The first step gelatin is prepared into a 5% aqueous solution, and the pH is adjusted to 8.0 after fully hydrating, adding 40% (w / w) glycerin and 5% (w / w gelatin) olive oil;

[0038]The second step is to pre-homogenize the material obtained in step 1 with a high-speed disperser at a speed of 6000rpm, homogenize for 3min, and then homogenize for the second time with micro-jet flow at a condition of 70 MPa for 3 cycles;

[0039] The third step is to degas the material obtained in step 2 for 3 minutes under a vacuum of 0.8 MPa, measure 45 mL of volume, pour it into a plexiglass box, and place it in a constant temperature and humidity box at 25 ° C and 40% RH to dry for 36 hours to obtain an emulsion Membrane material;

[0040] In this example, performance tests were performed on emulsion film materials obtained from oil phases with different proportions. The content of olive oil was 5%, 10%, 15%, and 20%, respectively, and other conditions remained unchanged. The results a...

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Abstract

The invention discloses a preparation method of a biodegradable emulsion film material. The method comprises the following steps of: (1) preparing gelatin into an aqueous solution, fully hydrating, adjusting the pH of the solution to 5.5-8.0, and adding glycerin in an amount of 10-40 percent of the mass of the gelatin and olive oil in an amount of 5-20 percent of the mass of the gelatin; (2) pre-homogenizing a material obtained in the step (1) with a high-speed disperser at the rotating speed of 6,000-20,000 revolutions per minute for 5 minutes, performing secondary homogenization with a micro-jet nanometer homogenizer under the pressure of 30-150MPa, and circulating for 1-3 times; and (3) degassing a material obtained in the step (2) in vacuum, and drying to obtain the biodegradable emulsion film material. The biodegradable emulsion film material obtained with the method disclosed by the invention contributes to overcoming the defects of water solubility, loose network structure and the like of a protein film, and has higher mechanical property and higher moisture barrier property than the conventional film material.

Description

technical field [0001] The invention relates to a preparation method of a biodegradable emulsion film material. Background technique [0002] Protecting the environment and saving resources has become a basic strategy for countries all over the world to achieve sustainable development. Environmental pollution and energy consumption caused by plastic products that once brought great convenience to human beings have attracted more and more attention. Due to my country's huge population base and rapid economic growth, the production and consumption of non-degradable plastics have grown explosively, which has caused serious environmental pollution and a large amount of energy consumption. Biomacromolecules such as proteins, polysaccharides and oils have good film-forming properties, biocompatibility and biodegradability, and are good substitutes for polyethylene films made of petroleum by-products. [0003] Membrane materials based on biological macromolecules such as protein,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L89/00C08K5/053C08K5/103C08J5/18C08J3/03
Inventor 尹寿伟马雯唐传核杨晓泉
Owner SOUTH CHINA UNIV OF TECH
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