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Preparation method of food packaging film based on bacterial nanocellulose

A technology of nanocellulose and packaging film, which is applied in the field of food packaging film, can solve the problems of large application area of ​​food packaging, insufficient biological activity function, poor biodegradability, etc., and achieve high cost performance, good commercial application prospects, and low cost Effect

Inactive Publication Date: 2020-07-31
SHANGHAI JIAO TONG UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at problems such as low yield of BC fermentation, high amount of BC actually used for film production, high film manufacturing cost, poor biodegradability and insufficient bioactive function of conventional food packaging films, etc., and proposes a A method for preparing a food packaging film based on bacterial nanocellulose, based on obtaining BC from the high-yielding bacteria of Gluconacetobacter xylinum and using it to prepare a bio-packaging film, which can greatly reduce the amount of BC and keep the film biodegradable. Edibility and enhanced biological function, the prepared packaging film not only has good strength, stretching degree, biodegradability, antibacterial and other biological activity functions, but also has high cost performance and wide application in food packaging. In order to realize the BC packaging film A solid foundation for business applications

Method used

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  • Preparation method of food packaging film based on bacterial nanocellulose
  • Preparation method of food packaging film based on bacterial nanocellulose
  • Preparation method of food packaging film based on bacterial nanocellulose

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Embodiment 1

[0034] The present embodiment relates to the preparation method of BC antibacterial composite film, specifically comprises:

[0035] ①Preparation of film-forming solution: Weigh 10% of starch, 1% of bacterial nanocellulose, 1% of sorbitol, and 2% of glycerin in turn, and mix and prepare film-forming solution. Cellulose, specifically Gluconacetobacter xylinus TDS-114, was preserved in the China General Microorganism Collection Center (CGMCC) on March 30, 2020, with the preservation number CGMCC No.19536. The Gluconacetobacter xylinus High-yielding strains from a mutagenesis screen isolated from grapevines and mutagenized with 1-methyl-3-nitro-1-nitrosoguanidine (NTG).

[0036] ②Film-forming liquid treatment: The obtained film-forming liquid was stirred and gelatinized at 90°C for 30 minutes on a constant temperature magnetic stirrer (85-2, Shanghai Chijiu);

[0037] ③Addition of antibacterial agent: Add different antibacterial agents to the film-forming solution after gelatini...

Embodiment 2

[0044] This embodiment relates to the preparation method of the BC composite film containing Chinese herbal medicine components, specifically including:

[0045] Step 1) preparation of Chinese herbal medicine extract, specifically comprising:

[0046] ①Put 200g of licorice and cinnamon purchased from the market (purchased from Taobao) in an oven at 60°C and dry to constant weight;

[0047] ②Crush and grind the dried licorice and cinnamon with constant weight, and weigh 50-150g of the powder;

[0048] ③Add 500mL of 95% ethanol according to the ratio of solid to liquid 1:10, soak and ultrasonically (SK300B, Shanghai Kedao Ultrasonic Instrument Co., Ltd.) for 2-4h;

[0049] ④ Filter with a 200-mesh sieve and collect the filtrate and filter residue respectively, and store the filtrate for future use;

[0050] ⑤ Add 200-500mL of 95% ethanol to the collected filter residue, soak and sonicate for 2-4h;

[0051] ⑥ filter and collect the filtrate;

[0052] ⑦ Combine the filtrates c...

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Abstract

The invention discloses a preparation method of a biological packaging film based on bacterial nanocellulose. The bacterial nanocellulose obtained by fermenting gluconacetobacter xylinum screened by mutagenesis, starch, sorbitol and glycerol are used as basic raw materials; water is added for mixing to prepare a film forming solution, bioactive components are added after further gelatinization, and the biological packaging film is obtained after coating and airing. According to the invention, the BC dosage can be greatly reduced, the biodegradability and edibility of the film are maintained, and the biological function is enhanced; the prepared packaging film not only has good strength, tensile strength, biodegradability, antibacterial function and other biological activity functions, butalso has high cost performance and large food packaging application range, and lays a solid foundation for realizing commercial application of BC packaging films.

Description

technical field [0001] The invention relates to a technology in the field of bioengineering and food, in particular to a cheap and edible cellulose prepared by using bacterial nanocellulose (BC) obtained from fermentation of Gluconacetobacter xylinum and other food additives. A method for food packaging films with bioactive functions. Background technique [0002] Bacterial nanocellulose (Bacterial cellulose, BC) is a porous network exopolysaccharide biomacromolecular polymer synthesized by fermentation of bacteria such as Acetobacter xylinum. Compared with plant fibers, it has high water holding capacity and high crystallinity. High strength, high tensile strength and excellent bioaffinity, biocompatibility, biocompatibility and biodegradability. In recent years, the application prospects of BC in medical, food, cosmetics and other fields have attracted widespread attention from all over the world. Chinese Patent Document No. CN108570156A discloses a vegetable-flavored ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L3/02C08L1/02C08K5/053C12P19/04C12N1/20C12R1/01
CPCC08J5/18C08J2303/02C08J2401/02C08K5/053C08K2201/014C12N1/20C12P19/04
Inventor 钟建江魏鹏飞冯利芳周亚琴步国建
Owner SHANGHAI JIAO TONG UNIV
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