Method of preparing bacterial cellulose/glass fiber composite material and prepared material

A technology of bacterial cellulose and composite materials, which is applied in the field of a method and the obtained materials, can solve problems such as inability to resist external forces, poor mechanical properties, and complicated processes, achieve good application prospects, improve mechanical properties, and expand application fields Effect

Inactive Publication Date: 2014-03-05
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It shows that the fiber bundles in the cellulose film are thicker and arranged parallel to the direction of the electric field lines. In the tensile test parallel to the direction of the electric field lines, the maximum force of the obtained material reaches 12.5N, which is greater than 9.8N without current addition. However, the mechanical properties perpendicular to the direction of the electric field lines are poor, only 8.1N. The reason is that the fiber bundles in the direction perpendicular to the electric field lines are reduced, and the hydrogen bonding between the parallel fiber bundles cannot resist strong external forces.
[0005] In the research on BC composite materials, BC is mostly broken into pulp, and then mixed with other materials for compounding. This secondary processing process is complex and energy-intensive.

Method used

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  • Method of preparing bacterial cellulose/glass fiber composite material and prepared material
  • Method of preparing bacterial cellulose/glass fiber composite material and prepared material
  • Method of preparing bacterial cellulose/glass fiber composite material and prepared material

Examples

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Embodiment 1

[0037] A method for bacterial cellulose / glass fiber composite material and the material obtained, the steps are as follows:

[0038] ⑴Fix a 10cm-long glass support on the electrophoresis tank with a height of about 3cm. Arrange the glass fiber filaments evenly between the two glass supports, about 1000 in total, and the arrangement direction is the direction of the vertical electric field line. figure 1 A;

[0039] (2) Take the G.xylinus bacterial liquid stored in a 400uL glycerol tube and put it in a 500uL fermentation medium. The composition of the fermentation medium (g / L): glucose 25, peptone 10, yeast extract powder 7.5, disodium hydrogen phosphate 10, glacial acetic acid to adjust pH to 6.0, pour it into the electrophoresis tank until the liquid level reaches the glass fiber surface, and incubate at 30°C for 24 hours to allow the bacteria to grow fully;

[0040] (3) Turn on the electric field, adjust the voltage to 10 volts, and cultivate for 3 days;

[0041] (4) Soak ...

Embodiment 2

[0044] A method for bacterial cellulose / glass fiber composite material and the material obtained, the steps are as follows:

[0045] ⑴Fix a 10cm-long glass bracket on the electrophoresis tank, about 3cm high, arrange the glass fiber filaments evenly between the two glass brackets, a total of about 1000 pieces, and the arrangement direction is parallel to the direction of the electric field line, showing figure 1 B;

[0046] (2) Take the G.xylinus bacterial liquid preserved in the 400uL glycerol tube and put it in the 500uL fermentation medium, and pour it into the electrophoresis tank until the liquid level reaches the glass fiber surface. Incubate at 30°C for 24 hours to allow the bacteria to grow fully;

[0047] (3) Turn on the electric field, adjust the voltage to 10 volts, and cultivate for 3 days;

[0048] (4) Soak the obtained composite material in 0.1mol / L sodium hydroxide solution overnight until the film is milky white. Rinse with water until the film is neutral. ...

Embodiment 3

[0051] A method for bacterial cellulose / glass fiber composite material and the material obtained, the steps are as follows:

[0052] ⑴Fix a 10cm-long glass bracket on the electrophoresis tank with a height of about 3cm, and arrange the glass fiber filaments evenly between the two glass brackets, about 1000 in total, and the arrangement direction is random, showing figure 1 C;

[0053] (2) Take the G.xylinus bacterial liquid preserved in a 400uL glycerol tube in a 500uL fermentation medium, pour it into the electrophoresis tank until the liquid level reaches the glass fiber surface, and incubate at 30°C for 4 days;

[0054](3) Soak the obtained composite material in 0.1mol / L sodium hydroxide solution overnight until the film is milky white. Rinse with water until the film is neutral. Dry at room temperature to constant weight. Test results: the maximum force along the direction of glass fiber filaments is greater than that of static cultured bacterial cellulose ( figure 2 ...

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Abstract

The invention relates to a method of preparing a bacterial cellulose / glass fiber composite material and a prepared material. The method comprises the following steps: (1), flatly spreading glass fiber filaments in an electric filed generating device; (2), pouring a fermentation culture medium containing a bacterial cellulose production bacterial strain into the electric field generating device; (3), culturing and fermenting; and (4), obtaining the composite material after culturing is ended, and dehydrating and drying the composite material after post-treatment. The method disclosed by the invention is simple in process, and greatly improves mechanical performances of the material by compounding glass fibers; moreover, bacterial fiber bundles can be arranged in a directed manner by weak direct-current electric fields, so that the material can generate directional difference; and besides, application field of the bacterial cellulose is expanded, and application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a composite material composed of bacterial cellulose and glass fiber, in particular to a bacterial cellulose / glass fiber composite material method and a prepared material. Background technique [0002] Glass fiber (GF) is an inorganic non-metallic material with excellent performance, good insulation, strong heat resistance, good corrosion resistance, and high mechanical properties. It is made of glass balls or waste glass through high-temperature melting, wire drawing and other processes. The diameter of its single filament is several microns to more than 20 microns, which is equivalent to 1 / 20-1 / 20 of a hair. 1 / 5. Glass fiber is usually used as a reinforcing material in composite materials, and its surface is rich in O- ions, which can generate hydrogen bonding forces with H+ in bacterial cellulose. [0003] Bacterial Cellulose (BC) is synthesized by microorganisms s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/02C08L1/02C08K7/14C12P19/04C12R1/01
Inventor 贾士儒刘淼钟成万同魏彧翘杨皛宁孙海焕韩培培
Owner TIANJIN UNIV OF SCI & TECH
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