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Bacterial cellulose-based edible straw and preparation method thereof

A bacterial cellulose and straw technology, which is applied to the field of bacterial cellulose-based edible straws and their preparation, can solve problems such as negative effects and hinder the growth of animals and plants, and achieve the effects of excellent water resistance and structural integrity that will not be destroyed

Active Publication Date: 2022-03-18
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Abandoned plastic straws have a serious negative impact on the environment and ecosystem, and even hinder the growth of plants and animals

Method used

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  • Bacterial cellulose-based edible straw and preparation method thereof
  • Bacterial cellulose-based edible straw and preparation method thereof
  • Bacterial cellulose-based edible straw and preparation method thereof

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preparation example Construction

[0042] On the other hand, the application also provides a preparation method of bacterial cellulose-based edible straws, comprising the following steps:

[0043] A) Prepared by 10-100g L -1 Glucose, 1-40g L -1 Yeast extract, 0.1-10g L -1 Citric acid, 0.1-10gL -1 Na 2 HPO 4 12H 2 O and 0.1-10g L -1 K H 2 PO 4 The composed liquid culture medium is then sterilized at 110-150° C., preferably 120° C., for 5-90 minutes in a sterilizing pot. After sterilization, bacterial cellulose-producing bacteria are inoculated into the culture medium. After continuous fermentation for about four days at a constant temperature of 25-30° C., a bacterial cellulose hydrogel with a desired thickness of, for example, 2-10 mm, preferably about 5 mm is obtained;

[0044] B) treating the bacterial cellulose hydrogel biosynthesized in step A) in an aqueous hydrogen peroxide solution with a mass fraction of 0-50%, removing impurities and bleaching;

[0045] C) drying the hydrogel obtained in ste...

Embodiment 1

[0067] A) firstly prepare by 50g L -1 Glucose, 5g L -1 Yeast extract, 2g L -1 Citric acid, 4g L -1 Na 2 HPO 4 12H 2 O and 2g L -1 K H 2 PO 4 The composed liquid medium was then sterilized at 120°C for 30 minutes in a sterilizer. After sterilization, inoculate Acetobacter xylinum (CGMCC 1.1812, purchased from China General Microorganism Culture Collection and Management Center) into the medium, and ferment continuously for about four days at a constant temperature of 25-30°C to obtain bacterial fibers with a thickness of about 5mm plain hydrogel;

[0068] B) treating the bacterial cellulose hydrogel in step A) in an aqueous hydrogen peroxide solution with a mass fraction of 3%, removing impurities and bleaching;

[0069] C) drying the hydrogel obtained in step B) to form a film at 60° C. under a temperature and pressure of 1 MPa to obtain a bacterial cellulose film;

[0070] D) in step C) the bacterial cellulose film surface that obtains is coated with a layer of sod...

Embodiment 2

[0084] A) firstly prepare by 50g L -1 Glucose, 5g L -1 Yeast extract, 2g L -1 Citric acid, 4g L -1 Na 2 HPO 4 12H 2 O and 2g L -1 K H 2 PO 4 The composed liquid medium was then sterilized at 120°C for 30 minutes in a sterilizer. After sterilization, inoculate the culture medium with Acetobacter xylinum (CGMCC 1.1812, purchased from China General Microorganism Culture Collection and Management Center), and ferment continuously for about four days at a constant temperature of 25-30°C to obtain bacteria with a thickness of about 5mm Cellulose hydrogel;

[0085] B) The bacterial cellulose hydrogel in step A) is treated in a 3% hydrogen peroxide aqueous solution to remove impurities and bleach, and then soaked in a commercially available edible coloring solution for 5 hours to make the pigment molecules Fully penetrate into the three-dimensional network of bacterial cellulose;

[0086] C) drying the hydrogel obtained in step B) to form a film at 30° C. under a temperatur...

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Abstract

The invention provides a bacterial cellulose-based edible straw and a preparation method thereof, wherein bacterial cellulose is biosynthesized. The bacterial cellulose-based edible straw comprises a plurality of bacterial cellulose layers and amorphous sodium alginate which plays a three-dimensional network interpenetrating, penetrating and suturing role among bacterial cellulose, and the interior of the bacterial cellulose-based straw is provided with a plurality of hierarchical structures on microscale. And the bacterial cellulose-based edible straw has a three-dimensional nanometer network structure which is physically wound in a hyperfine manner. The bacterial cellulose-based straw provided by the invention has the characteristics of high strength, high toughness, no release of micro-plastic and the like, is especially degradable, safe and edible, and is a favorable competitor of traditional plastic straws and paper straws with poor use experience in the market.

Description

technical field [0001] The invention relates to the technical field of new material development, in particular to a bacterial cellulose-based edible straw produced by biosynthesis and a preparation method thereof. Background technique [0002] With the continuous development of the plastic industry, plastic products have brought great convenience to human life, but they have also caused serious plastic pollution. To date, some 300 million tonnes of plastic are produced each year, most of which are single-use. Plastic straws are a mass-used plastic item that lasts only a few minutes, yet takes hundreds of years to fully degrade. Discarded plastic straws have serious negative impacts on the environment and ecosystem, and even hinder the growth of plants and animals. [0003] Cellulose is the most abundant and abundant natural renewable polymer on earth, which can be isolated from plants or produced by bacterial fermentation. Bacterial cellulose (that is, coconut fruit, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47G21/18C12P19/04C12N1/20C12R1/01C12R1/02C12R1/41
CPCA47G21/18C12P19/04C12N1/20
Inventor 俞书宏刘兆祥杨怀斌管庆方
Owner UNIV OF SCI & TECH OF CHINA
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