Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Starch/polylactic acid antibacterial activity packaging material as well as preparation method and application thereof

An antibacterial activity, packaging material technology, applied in packaging, wrapping paper, transportation and packaging, etc., to achieve both antibacterial timeliness and long-term effects

Active Publication Date: 2012-10-31
SOUTH CHINA UNIV OF TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The research work on the preparation of food antibacterial active packaging materials with antibacterial activity and controlled release function with both antibacterial timeliness and long-term effect using starch / polylactic acid blend materials as the base material has not been reported at home and abroad.

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
  • Starch/polylactic acid antibacterial activity packaging material as well as preparation method and application thereof
  • Starch/polylactic acid antibacterial activity packaging material as well as preparation method and application thereof
  • Starch/polylactic acid antibacterial activity packaging material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Polylactic acid (REVODE101, Zhejiang Hisun Biomaterials Co., Ltd.): 60kg

[0039] Corn starch (food grade, Huanglong Food Industry Co., Ltd.): 30kg, dried to a moisture content of 0.5%

[0040] Diphenylmethane-4,4-diisoate (chemically pure, Xiamen Lufa Trade Development Co., Ltd.): 0.01kg

[0041] Chitosan (food grade, deacetylation degree 90%, Jinan Haidebei Marine Biological Engineering Co., Ltd.): 9.99kg.

[0042] The preparation method is as follows:

[0043] (1) starch plasticization

[0044] Dry the starch until the moisture content is 0.5%, add 1-2% glycerin (glycerin / starch, w / w), mix evenly, feed from the first feeding port of the twin-screw extruder, and convey through the screw conveying section, Pre-plasticized under the condition of external heating of the screw, the pre-plasticized temperature is 140°C, the pre-plasticized starch is further plasticized under the action of the kneading screw block, the plasticized temperature is 170°C, the outer diameter...

Embodiment 2

[0057] Each component in the blended material is adjusted to:

[0058] Polylactic acid (REVODE101, Zhejiang Hisun Biomaterials Co., Ltd.): 45kg

[0059] Potato starch (food grade, Qinghai Sanjiang Group Co., Ltd.): 44kg, dried to a moisture content of 1.0%

[0060] Diphenylmethane-4,4-diisoate (chemically pure, Xiamen Lufa Trade Development Co., Ltd.): 1kg Nisin (food grade, Xiamen Abio Biotechnology Co., Ltd.): 10kg.

[0061] The preparation method is the same as in Example 1.

[0062] (1) The prepared antibacterial material was used for the packaging of fresh pork (Guangzhou China Resources Wanjia Supermarket, the same below), stored at 4°C for one week, according to the national standard GB / T4789.17-2003 "Food Hygiene Microbiology The method specified in "Inspection of Meat and Meat Products Inspection" tests the number of Escherichia coli and Staphylococcus aureus, and the results are shown in Table 2.

[0063] (2) The prepared antibacterial material was used for the pa...

Embodiment 3

[0067] Each component in the blended material is adjusted to:

[0068] Polylactic acid (REVODE101, Zhejiang Hisun Biomaterials Co., Ltd.): 60kg

[0069] High-chain starch (Hylon V, food grade, American National Starch Company): 35kg, dried to a moisture content of 0.5%

[0070] Diphenylmethane-4,4-diisoate (chemically pure, Xiamen Lufa Trade Development Co., Ltd.): 0.05kg

[0071] Lysozyme (lysozyme, food grade, Jinan Xuyunchuang Biotechnology Co., Ltd.): 4.95kg.

[0072] The preparation method is the same as in Example 1.

[0073] The mechanical properties, thermal properties and barrier properties of the prepared antibacterial active packaging materials were tested, and the results are shown in Table 2. The material is used for the packaging of fresh pork, fresh chicken and homemade ham sausage (without preservatives), the total number of colonies and the number of Escherichia coli and Staphylococcus aureus in the food are tested before packaging, and they are stored at 4...

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
tensile strengthaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
elongation at breakaaaaaaaaaa
Login to View More

Abstract

The invention discloses a starch / polylactic acid blending antibacterial activity packaging material with the antibacterial activity control release function, as well as a preparation method and application thereof. The proper hydrophilic and hydrophobic property of the starch / polylactic acid blending material is utilized to regulate the migration dissolution rate of an antibacterial agent, and therefore, the antibacterial material combines the antibacterial timeliness and the antibacterial long effectiveness and prolongs the food shelf life. The antibacterial packaging material comprises the following compositions in percentage by weight: 30-40 percent of starch, 2-10 percent of antibacterial agent, 45-60 percent of polylactic acid and 0.01-1 percent of compatibilizer. The compositions are sequentially added into a twin-screw extruder from different feeding holes, the blended materials are treated by plasticization, kneading and reaction blending to prepare the starch / polylactic acid blending antibacterial activity packaging material. On the one hand, the material fulfills the function of antibacterial activity control release and combines the antibacterial timeliness and the antibacterial long effectiveness, and on the other hand, the material has the advantages of excellent mechanical property and wider application range and can be used for high water activity food corrosionand bacteria prevention.

Description

technical field [0001] The invention relates to the field of food active packaging materials, in particular to a starch / polylactic acid antibacterial active packaging with antibacterial activity controlled release function, complete biodegradation, which can be used for high water activity foods and has antibacterial timeliness and long-term effect materials, and related to the preparation methods and applications of the materials. Background technique [0002] Antibacterial active packaging is a new packaging concept proposed in the 1990s. It is to add antibacterial agents to polymer packaging materials to generate antibacterial activity through antibacterial agents to reduce or replace the method of directly adding antiseptic substances to food. Maintain a stable concentration of antibacterial agents inside the package to achieve the purpose of antibacterial and antiseptic, so that the food can be preserved for a long time. Antibacterial active packaging materials have in...

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): C08L67/04C08L3/02B29C47/92B65D65/46B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 李晓玺陈玲刘佳刘鹏李琳苏健裕
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com