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Graphene oxide-bacterial cellulose composite material and preparation method thereof

A technology of bacterial cellulose and composite materials, which is applied in biochemical equipment and methods, chemical instruments and methods, and botanical equipment and methods, etc. The effect of uneven distribution, good flexibility and simple process

Inactive Publication Date: 2014-05-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This process not only involves highly toxic chemical reagents, high temperature and multi-step reactions, but also has disadvantages such as aggregation of graphene sheets and uncontrollable distribution of components.

Method used

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  • Graphene oxide-bacterial cellulose composite material and preparation method thereof
  • Graphene oxide-bacterial cellulose composite material and preparation method thereof
  • Graphene oxide-bacterial cellulose composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of graphene oxide-bacterial cellulose composite material comprises the following steps:

[0036] Prepare a graphene oxide dispersion with a mass volume concentration of 0.2 mg / ml in deionized water, ultrasonically disperse for 2 hours, and sterilize by ultraviolet light for 3 times, each time for 15 minutes;

[0037] Prepare bacterial cellulose culture solution with pure water, glucose, peptone, citric acid, disodium hydrogen phosphate, potassium dihydrogen phosphate and yeast powder. The pH of the culture solution is 4.5. Sterilize at MPa for 30 minutes;

[0038]Add the above-mentioned graphene oxide dispersion to the above-mentioned bacterial cellulose culture solution, the volume ratio of the graphene oxide dispersion to the bacterial cellulose culture solution is 1:10; use an ultrasonic cell pulverizer to perform ultrasonic pulverization, and set the ultrasonic pulverization The process conditions are: every 3 seconds of work and 3 seconds of...

Embodiment 2

[0042] The preparation method of graphene oxide-bacterial cellulose composite material comprises the following steps:

[0043] Prepare a graphene oxide dispersion with a mass volume concentration of 0.2 mg / ml in deionized water, ultrasonically disperse for 2 hours, and sterilize by ultraviolet light for 3 times, each time for 15 minutes;

[0044] Prepare bacterial cellulose culture solution with pure water, glucose, peptone, citric acid, disodium hydrogen phosphate, potassium dihydrogen phosphate and yeast powder. The pH of the culture solution is 4.5. Sterilize at MPa for 30 minutes;

[0045] Add the above-mentioned graphene oxide dispersion liquid to the above-mentioned bacterial cellulose culture liquid, and the volume ratio of the graphene oxide dispersion liquid and the bacterial cellulose culture liquid is 1:20; use an ultrasonic cell pulverizer to carry out ultrasonic crushing, set the ultrasonic crushing The process conditions are: every 3 seconds and 3 seconds stop, ...

Embodiment 3

[0049] The preparation method of graphene oxide-bacterial cellulose composite material comprises the following steps:

[0050] Prepare a graphene oxide dispersion with a mass volume concentration of 0.5 mg / ml in deionized water, ultrasonically disperse for 3 hours, and sterilize with ultraviolet light for 3 times, each time for 15 minutes;

[0051] Prepare bacterial cellulose culture solution with pure water, glucose, peptone, citric acid, disodium hydrogen phosphate, potassium dihydrogen phosphate and yeast powder. The pH of the culture solution is 4.5. Sterilize at MPa for 30 minutes;

[0052] Add the above-mentioned graphene oxide dispersion to the above-mentioned bacterial cellulose culture solution, the volume ratio of the graphene oxide dispersion to the bacterial cellulose culture solution is 1:10; use an ultrasonic cell pulverizer to perform ultrasonic pulverization, and set the ultrasonic pulverization The process conditions are: every 5 seconds and 3 seconds stop, 6...

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Abstract

The invention discloses a graphene oxide-bacterial cellulose composite material which is composited from bacterial cellulose and graphene oxide. The preparation method comprises the following steps: adopting a dynamic co-culture method; adding a graphene oxide dispersion solution to a bacterial cellulose culture solution containing bacteria and evenly mixing; carrying out dynamic cultivation by a table concentrator in the 30 DEG C environment; evenly distributing graphene oxide sheets on a bacterial cellulose fiber in the growth process of the bacterial cellulose, so that the defects that graphene oxide particles are easily reunited and unevenly dispersed are effectively inhibited, so as to obtain the graphene oxide-bacterial cellulose composite material. The graphene oxide-bacterial cellulose composite material is simple in process, and the graphene oxide and the bacterial cellulose are composited. The composite material is good in property, and the composite technical field is expanded.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a composite material composed of graphene oxide and bacterial cellulose and a preparation method thereof. Background technique [0002] Bacterial cellulose is a general term for cellulose synthesized by microorganisms. The typical one is Acetobacter xylinum in the genus Acetobacter, which has the highest cellulose production capacity and is recognized as a model strain for studying cellulose synthesis, crystallization process and structural properties. [0003] Bacterial cellulose is similar to natural (plant) cellulose in physical properties, chemical composition and molecular structure, but has the following characteristics: (1) high purity, degree of polymerization and crystallinity; (2) ultrafine network structure; (3) ) high tensile strength and elastic modulus; (4) strong water holding capacity; (5) high biocompatibility, adaptability and good biode...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08K3/04C12P19/04A01N59/00A01P1/00B01J20/24C12R1/02
Inventor 万怡灶司洪娟罗红林熊光耀
Owner TIANJIN UNIV
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