Processing method of high barrier bacteriostatic starch-based composite material

A composite material and processing method technology, applied in the processing field of high-barrier antibacterial starch-based composite materials, can solve the gap between product performance, manufacturing cost, key technology and industrial scale, few high-barrier and antibacterial dual-functional materials, and cannot Form high barrier and antibacterial materials and other problems, achieve the effect of promising market prospects, low cost, and solving oil crisis and plastic pollution

Active Publication Date: 2018-06-01
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Multinational companies such as Warner-Lambert Company of the United States, Novamont Company of Italy, St.Lawrance Company of Canada, and Ferruzzi Company of Italy have long been committed to the research and development of starch-based materials, which has promoted the commercialization of bio-based materials worldwide, but it is still in its infancy in my country. Compared with the international advanced level, there are still gaps in product performance, manufacturing cost, key technology and industrialization scale, etc.
[0004] At present, commercial materials are mostly petroleum-based materials with high barrier or antibacterial single function, but there are few reports on materials with high barrier and antibacterial dual functions, mainly because the addition of antibacterial agents often leads to a decrease in barrier properties, thus making it impossible to form high barrier and antibacterial materials. Barrier antibacterial material

Method used

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  • Processing method of high barrier bacteriostatic starch-based composite material
  • Processing method of high barrier bacteriostatic starch-based composite material
  • Processing method of high barrier bacteriostatic starch-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Prepare high-barrier antibacterial starch-based composite materials as follows:

[0066] (1) Prepare ordinary starch into a starch milk solution with a concentration of 5%, heat it for complete gelatinization, cool to 35°C, adjust the pH to 3.5, and add isoamylase (0.5U / g starch) for 3 hours;

[0067] (2) Add 1% antibacterial agent after the enzyme-inactivating treatment and stir at 4°C for 5 minutes, then dry and pulverize to obtain the starch compound;

[0068] (3) Mix the starch compound, polysaccharide nanocrystals, and compatible chain extender according to the mass percentage of 100:1:0.5, and dry reaction at 80°C, 70r / min, 0.1MPa for 5min, after the reaction is complete That is, a high-barrier antibacterial starch-based composite material is obtained.

[0069] The starch-based composite material prepared in this example has a tensile strength of 7.35MPa, an elongation at break of 45%, and a water vapor transmission rate of 0.387g mm / m 2 ·h·kPa, the oxygen trans...

Embodiment 2

[0071] Prepare high-barrier antibacterial starch-based composite materials as follows:

[0072] (1) Prepare ordinary starch into a starch milk solution with a concentration of 30%, heat it for complete gelatinization, cool to 55°C, adjust the pH to 6.0, and add pullulanase (10U / g starch) for 10 hours;

[0073] (2) Add 5% antibacterial agent after the enzyme-inactivating treatment and stir at 20°C for 10 minutes, then dry and pulverize to obtain the starch compound;

[0074] (3) Mix the starch compound, polysaccharide nanocrystals, and compatible chain extender according to the mass percentage of 100:10:3, and dry-react at 120°C, 150r / min, and 10MPa for 30min. After the reaction is complete, the A high-barrier antibacterial starch-based composite material was obtained.

[0075] The starch-based composite material prepared in this example has a tensile strength of 10.10 MPa, an elongation at break of 70%, and a water vapor transmission rate of 0.248 g mm / m 2 ·h·kPa, the oxygen...

Embodiment 3

[0077] Prepare high-barrier antibacterial starch-based composite materials as follows:

[0078] (1) Prepare ordinary starch into a starch milk solution with a concentration of 15%, heat it for complete gelatinization, cool to 40°C, adjust the pH to 4.5, and add isoamylase (5U / g starch) for 6 hours;

[0079] (2) Add 3% antibacterial agent after the enzyme-inactivating treatment and stir at 10°C for 10 minutes, then dry and pulverize to obtain the starch compound;

[0080] (3) Mix the starch compound, polysaccharide nanocrystals, and compatible chain extender according to the mass percentage of 100:5:1, and dry-react at 100°C, 100r / min, and 5MPa for 15min. After the reaction is complete, the A high-barrier antibacterial starch-based composite material was obtained.

[0081] The starch-based composite material prepared in this example has a tensile strength of 9.32MPa, an elongation at break of 48%, and a water vapor transmission rate of 0.307g mm / m 2 ·h·kPa, the oxygen transmi...

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Abstract

The invention discloses a processing method of a high barrier bacteriostatic starch-based composite material, belonging to the technical field of modern food processing. According to the processing method, common starch is taken as a raw material, and the high barrier bacteriostatic starch-based composite material is prepared by using technologies such as enzymatic debranching modification, multiplex blending polymerization and functional design recombinantion. The processing method is simple in production process, advanced in technology, high in safety, easy in control of process, and can realize continuous production; the product can be used as a biodegradable material and applied to multiple fields such as food, medicine and chemicals for daily use.

Description

technical field [0001] The invention relates to a processing method of a high-barrier antibacterial starch-based composite material, which belongs to the technical field of modern food processing. Background technique [0002] As a renewable resource second only to cellulose, starch has the characteristics of cheap and easy to obtain, degradable and easy to convert into starch derivatives. For a long time, all countries in the world have attached great importance to the research on the development and utilization of starch resources, especially the modification of starch by various methods has always been a research hotspot for scientists and manufacturers. In my country, starch resources are abundant. In 2015, the total starch production was as high as 21.6 million tons, of which the modified starch production was only 1.35 million tons. Compared with developed countries in Europe and the United States, my country's starch deep processing level is not high, the product qua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L1/04C08L5/08
Inventor 缪铭江波贾雪坎帕内拉·奥斯瓦尔多金征宇张涛
Owner JIANGNAN UNIV
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