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Preparation method of 3D (Three-dimensional) graphene oxide doped nanofiber scaffold based on pneumatics

A nanofiber and graphene technology, applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of insufficient three-dimensionality of nanofibers, easy stacking and agglomeration of graphene oxide, cumbersome process, etc., to overcome the problem of being packaged Inside the fiber, solve the problem of easy stacking and agglomeration on the surface of the fiber, with good bulkiness

Inactive Publication Date: 2018-11-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects in the prior art such as cumbersome process, insufficient three-dimensionality of nanofibers, and easy stacking and agglomeration of graphene oxide, the present invention provides a method for preparing a 3D graphene oxide-doped nanofiber scaffold based on pneumatics. The graphene oxide is evenly doped on the nanofibers, and the problem of high surface tension of the liquid in the bath is overcome by introducing sheath gas, so that the fluffiness of the nanofibers is better

Method used

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  • Preparation method of 3D (Three-dimensional) graphene oxide doped nanofiber scaffold based on pneumatics
  • Preparation method of 3D (Three-dimensional) graphene oxide doped nanofiber scaffold based on pneumatics
  • Preparation method of 3D (Three-dimensional) graphene oxide doped nanofiber scaffold based on pneumatics

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Embodiment 1

[0032] (1) Measure 3mL of dispersant DMF: tetrahydrofuran: dichloromethane = 6:2:4 in a screw-top glass bottle, weigh 0mg of self-made graphene oxide, and put it into a glass bottle, put the screw-top glass bottle After tightening, seal with a sealing film, and then ultrasonically crush and disperse for 60 minutes to obtain a dispersion without graphene oxide;

[0033] (2) Weighing 0.45 g of polyacrylonitrile precursor and adding it to the graphene oxide dispersion, heating and stirring with magnetic force at 45° C. and 180 r / min for 10 hours to obtain a spinning solution;

[0034] (3) A centrifuge with a rotating speed of 800r / min degasses the spinning solution for 1 hour to prepare an electrospinning solution, and then uses the built electrospinning device for electrospinning. The device refers to the patent with application number 201611200340.4, the receiving device and its working effect Figure such as Figure 5 (a) (b) shown. Electrospinning parameters: the spinneret n...

Embodiment 2

[0036] (1) Measure 3mL of dispersant DMF: tetrahydrofuran: dichloromethane = 6:2:4 in a screw-top glass bottle, weigh 3 mg of self-made graphene oxide, and put it into a glass bottle, put the screw-top glass bottle After tightening, seal it with a parafilm, ultrasonically crush and disperse for 60 minutes, and obtain a dispersion liquid with a graphene oxide content of 1 mg / ml, and its morphology is as follows figure 2 shown;

[0037] (2) Weighing 0.45 g of polyacrylonitrile precursor and adding it to the graphene oxide dispersion, heating and stirring with magnetic force at 45° C. and 180 r / min for 10 hours to obtain a spinning solution;

[0038] (3) A centrifuge with a rotating speed of 800r / min degasses the spinning solution for 1 hour to prepare an electrospinning solution, and then uses the built electrospinning device to perform electrospinning. The device refers to the patent with application number 201611200340.4. Electrospinning parameters: The silk needle head is a...

Embodiment 3

[0040] (1) Measure 3mL of dispersant DMF: tetrahydrofuran: dichloromethane = 6:2:4 in a screw-top glass bottle, weigh 6 mg of self-made graphene oxide, and put it into a glass bottle, put the screw-top glass bottle After tightening, seal with a sealing film, ultrasonically crush and disperse for 60 minutes, and obtain a dispersion with a graphene oxide content of 2 mg / ml;

[0041] (2) Weighing 0.45 g of polyacrylonitrile precursor and adding it to the graphene oxide dispersion, heating and stirring with magnetic force at 45° C. and 180 r / min for 10 hours to obtain a spinning solution;

[0042](3) A centrifuge with a rotating speed of 800r / min performs centrifugal degassing on the spinning solution for 1 hour to prepare an electrospinning solution, and then uses the built electrospinning device for electrospinning. The device refers to the patent with the application number 201611200340.4. The silk needle head is a No. 21 flat needle. Under the voltage of 14kV, the receiving di...

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Abstract

The invention provides a preparation method of a 3D (Three-dimensional) graphene oxide doped nanofiber scaffold based on pneumatics, and belongs to the field of composite materials. The preparation method comprises the following steps: firstly, mixing graphene oxide with a dispersant and carrying out ultrasonication treatment on a mixture to obtain a uniform solution; secondly, putting polyacrylonitrile into the prepared solution, carrying out magnetic stirring and centrifugal treatment, defoaming and uniformly mixing to obtain electrostatic spinning liquid; introducing auxiliary sheath gas, and blowing the obtained electrostatic spinning liquid into a coagulation bath to form fibers through a self-assembly device; carrying out freeze drying on wet fibers to obtain the graphene oxide doped3D nanofiber scaffold. According to the preparation method disclosed by the invention, the graphene oxide is uniformly doped into the nanofibers; on one hand, the defect that the graphene oxide is easy to stack and agglomerate on the fiber surface is overcome; on the other hand, the problem that the graphene oxide is encapsulated inside the fibers is solved, so that excellent performance of the graphene oxide is greatly played; a product has the advantages of fluffy structure, large specific surface area, large pore diameter and the like; the 3D graphene oxide doped nanofiber scaffold based on the pneumatics can be applied to cell culture.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a method for preparing a pneumatic-based 3D graphene oxide-doped nanofiber support. Background technique [0002] Electrospinning technology refers to a method in which a polymer solution or melt is sprayed and stretched under the action of a high-voltage electrostatic field, and the solvent is volatilized and solidified to obtain a fibrous material. Compared with other conventional spinning processes, the most important feature of electrospinning is that nanofibers with large specific surface area, high porosity, small pore size and large aspect ratio can be obtained, which has significant significance in the fields of cell culture, environmental protection and governance. . Therefore, in recent years, electrospinning technology has been highly valued by people. [0003] As a carbon material, graphene oxide has the characteristics of high specific surface area, good electric...

Claims

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Application Information

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IPC IPC(8): A61L31/02A61L31/14D04H1/728D01D5/00D01F1/10D01F6/54
CPCA61L31/024A61L31/146D01D5/0046D01F1/10D01F6/54D04H1/728
Inventor 冯章启李通史传梅赵宾李家城袁旭严珂夏一鹭高帷策
Owner NANJING UNIV OF SCI & TECH