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Electrostatic spinning biological composite desulfurization film and preparation method thereof

An electrospinning and biological technology, applied in the field of electrospinning biocomposite desulfurization membrane and its preparation, can solve the problems of reduced active area, easy shedding of bacteria, low degree of combination of bacteria and carrier materials, etc. Effects of Cyclic Stability

Inactive Publication Date: 2018-08-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary bacteria immobilization has three disadvantages: first, the combination degree of bacteria and carrier materials is low, and the bacteria are easy to fall off; second, the strength of the immobilization material is low, and the bacteria are easy to leak to the external environment; Reduced, inefficient mass transfer

Method used

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  • Electrostatic spinning biological composite desulfurization film and preparation method thereof
  • Electrostatic spinning biological composite desulfurization film and preparation method thereof
  • Electrostatic spinning biological composite desulfurization film and preparation method thereof

Examples

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Embodiment 1

[0032] Such as figure 1 As shown, it is an electrospinning biocomposite desulfurization membrane provided in this example. The electrospinning biocomposite desulfurization membrane is formed by stacking a number of disordered fibers, each fiber is composed of a core layer and a shell layer, and the shell layer The layer includes an inner shell and an outer shell covering the inner shell. The core layer is composed of glycerol dispersed with desulfurization bacteria, the inner shell is a polymer material layer, and the outer shell is formed by accumulation of several ZIF-8 particles. In this embodiment, the polymer material is polycaprolactone. The desulfurization bacterium is Gordoniaamicalis WQ-01, which comes from the China Industrial Microorganism Culture Collection Management Center, and the preservation number is CICC 20663.

[0033] This embodiment also provides a method for preparing the biocomposite desulfurization membrane by coaxial electrospinning, and its specific...

Embodiment 2

[0040] This embodiment provides a method for preparing the biocomposite desulfurization membrane by coaxial electrospinning, and its specific operation steps are as follows:

[0041] (1) Dissolve 2 g of polycaprolactone in chloroform, stir until clarified, keep in the dark until there are no bubbles, and use it as the electrospinning outer liquid;

[0042] (2) Take 5ml of Gordonia amicalis WQ-01 with an OD value of 1.0, wash it several times with PBS solution, concentrate it, disperse it in 2ml glycerin, stir it at a low speed until it is evenly dispersed, and use it as the electrospinning inner solution;

[0043] (3) Assemble the coaxial electrospinning, and install the inner and outer liquids on the propulsion pump with 5ml syringes;

[0044] (4) The receiving distance is set to 14cm, the voltage of the receiving plate is set to -0.15kv, the voltage at the needle is set to 10.5kv, the advancing speed of the inner core is 0.1165mm / min, the advancing speed of the outer shell i...

Embodiment 3

[0047] This embodiment provides a method for preparing the biocomposite desulfurization membrane by coaxial electrospinning, and its specific operation steps are as follows:

[0048] (1) Dissolve 1.8g of polycaprolactone and 0.2g of polyethylene glycol in 20g of a mixed solution of chloroform and dimethylformamide with a mass ratio of 9:1, stir until clear, and stand in the dark until there are no bubbles , to be used as the electrospinning liquid;

[0049] (2) Take 5ml of Gordonia amicalis WQ-01 with an OD value of 1.0, wash it several times with PBS solution, concentrate it, disperse it in 2ml glycerin, stir it at a low speed until it is evenly dispersed, and use it as the electrospinning inner solution;

[0050](3) Assemble the coaxial electrospinning, and install the inner and outer liquids on the propulsion pump with 5ml syringes;

[0051] (4) The receiving distance is set to 14cm, the voltage of the receiving plate is set to -0.15kv, the voltage at the needle is set to ...

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Abstract

The invention discloses an electrostatic spinning biological composite desulfurization film and a preparation method thereof. The electrostatic spinning biological composite desulfurization film is formed by accumulating a plurality of disordered fibers; each fiber consists of a core layer and a shell layer; the shell layer comprises an inner shell layer and an outer shell layer wrapping the innershell layer; the core layer consists of glycerol dispersed with desulfurization bacteria; the inner shell layer is a macromolecular material layer; the outer shell layer is formed by accumulating a plurality of ZIF-8 particles. The preparation method comprises the following steps of dissolving macromolecules into an organic solvent to obtain coaxial electric spinning shell liquid; (2) dispersingbacteria into the glycerol to obtain the coaxial electric spinning core liquid; (3) performing static electric spinning on shell core solution by using an electric spinning needle so as to obtain a static electric spinning film; (4) firstly soaking the electrostatic spinning film into dimethylimidazole solution; then, adding a zinc acetate solution; performing slight oscillation for uniform mixing; standing for a plurality of minutes; (5) cleaning the film obtained in the step (4) by deionized water for many times. The prepared biological composite desulfurization film has the advantages thatthe process is simple and convenient; the industrialized mass production is easy; the excellent desulfurization activity and excellent circulation stability are realized.

Description

technical field [0001] The invention belongs to the field of biocomposite materials, and in particular relates to an electrospinning biocomposite desulfurization membrane and a preparation method thereof. Background technique [0002] In the petroleum industry, sulfur-containing compounds have caused great harm to human health and environmental protection. Biological desulfurization is currently recognized as a green and effective desulfurization method, and the use of bacterial immobilization to promote biological desulfurization to industrial applications has great potential. Ordinary bacteria immobilization has three disadvantages: first, the combination degree of bacteria and carrier materials is low, and the bacteria are easy to fall off; second, the strength of the immobilization material is low, and the bacteria are easy to leak to the external environment; reduced, the mass transfer efficiency is low. Therefore, it is urgent to provide a feasible and effective meth...

Claims

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Application Information

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IPC IPC(8): C10G31/00D01D5/00D04H1/728
CPCC10G31/00C10G2300/202D01D5/0069D01D5/0092D04H1/728
Inventor 阳晓宇张文田歌覃宏伟
Owner WUHAN UNIV OF TECH