Unlock instant, AI-driven research and patent intelligence for your innovation.

Titanium dioxide-soy protein isolate composite nano antimicrobial film and preparation method thereof

A technology of soybean protein isolate and titanium dioxide, which is applied in flexible covering, packaging, wrapping paper, etc., can solve the problems of environmental pollution, not easy to decompose and rot, and achieve the effect of broad antibacterial spectrum, delaying oxidative deterioration and good immediate effect.

Active Publication Date: 2013-10-30
FUZHOU UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Among all kinds of packaging materials, plastic is widely used in food packaging due to its superior performance and low cost. However, plastic packaging is stable in nature, and it is not easy to decompose and rot when it is discarded in the environment after use. Long-term storage is easy to cause environmental pollution.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Titanium dioxide-soy protein isolate composite nano antimicrobial film and preparation method thereof
  • Titanium dioxide-soy protein isolate composite nano antimicrobial film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] (1) Preparation of protein liquid: Glycerin (plasticizer), water, and soybean protein isolate are gradually added in the state of magnetic stirring to make protein liquid.

[0033] (2) Adjust the pH value: Use 0.1mol / L NaOH solution to adjust the pH value to 9-11.

[0034] (3) Constant temperature water bath heating: the water bath is controlled at 70°C-80°C, and heated for 20-30min. Turn on the magnetic stirrer to stir the solution in the water bath to make it heated evenly.

[0035] (4) Cooling: After heating in a water bath, cool to room temperature.

[0036] (5) Adding titanium dioxide: Measure a certain volume of the pre-dispersed titanium dioxide solution and add it to the cooled protein solution, so that the content of nano-titanium dioxide is 0.5-3.0g / 150ml film-forming solution, and magnetically stir for 1-2 hours.

[0037] (6) Filtration and degassing: quickly filter with four layers of gauze, and let it stand for half an hour to remove air bubbles.

[0038...

Embodiment 1

[0046]Soy protein isolate is 6g, glycerin 1.5g, titanium dioxide 0.5g, water 127mL.

[0047] The protein used should be soybean protein isolate, the quality meets the national standard, and it is fresh and not expired.

[0048] (1) Preparation of protein solution: Glycerin 1.5g, water 127mL, 6g soybean protein isolate was gradually added under the state of magnetic stirring (1200r / min) to prepare a solution with a certain concentration.

[0049] (2) Adjust the pH value: Use 0.1mol / L NaOH solution to adjust the pH value to about 10.00.

[0050] (3) Constant temperature water bath heating: the water bath is stably controlled at about 70°C, and heated for 20 minutes. Turn on the magnetic stirrer to stir the solution in the water bath to make it heated evenly.

[0051] (4) Cooling: After heating in a water bath, cool to room temperature.

[0052] (5) Adding titanium dioxide: Measure 16.7 mL of the pre-dispersed titanium dioxide solution (3%) into the cooled protein solution, an...

Embodiment 2

[0057] Soy protein isolate is 6g, glycerin 6.0g, titanium dioxide 1.5g, water 88mL.

[0058] (1) Preparation of protein solution: Glycerin 6.0g, water 88mL, under the state of magnetic stirring (1200r / min), 6g soybean protein isolate was gradually added to prepare a solution with a certain concentration.

[0059] (2) Adjust the pH value: Use 0.1mol / L NaOH solution to adjust the pH value to about 10.00.

[0060] (3) Constant temperature water bath heating: the water bath is stably controlled at about 70°C, and heated for 20 minutes. Turn on the magnetic stirrer to stir the solution in the water bath to make it heated evenly.

[0061] (4) Cooling: After heating in a water bath, cool to room temperature.

[0062] (5) Adding titanium dioxide: Measure 50 mL of the previously dispersed titanium dioxide solution (3%) into the cooled protein solution, and stir magnetically for 1.5 hours.

[0063] (6) Filtration and degassing: quickly filter the protein solution of the composite mem...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
transmittivityaaaaaaaaaa
transmittivityaaaaaaaaaa
Login to View More

Abstract

The invention provides a titanium dioxide-soy protein isolate composite nano antimicrobial film and a preparation method thereof. The material of the composite film comprises nano titanium dioxide. The titanium dioxide-soy protein isolate composite nano antimicrobial film can be used for inhibiting common microbes in foods. According to the invention, since titanium dioxide is added to the material, the water permeability, air permeability and light transmittance of the film is reduced, so that the composite film achieves low water migration and good anticorrosion effect, can better exert the function of food packaging protection, can postpone the oxidative deterioration of foods so as to achieve oxidation resistance; in addition, the composite utilization of titanium dioxide serving as a photochemical catalyst and protein. The composite film made according to the invention has good physical properties and antimicrobial performance and significant economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of food packaging materials, and more specifically relates to a titanium dioxide-isolated soybean protein composite nanometer antibacterial film and a preparation method thereof. Background technique [0002] Among all kinds of packaging materials, plastic is widely used in food packaging due to its superior performance and low cost. However, plastic packaging is stable in nature, and it is not easy to decompose and rot when discarded in the environment after use. Long-term storage may easily cause environmental pollution. At present, the application of artificial synthetic films is being challenged from the aspects of safety and environmental protection. Edible packaging films have become a research trend because of their higher safety and environmental protection. The development of edible coatings and films from biological macromolecules such as proteins, polysaccharides and lipids has become a research h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L89/00C08K13/02C08K3/22C08K5/053C08J5/18B65D65/46
Inventor 汪少芸祝贝贝孟春李旦振吴佳
Owner FUZHOU UNIV