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A method for preparing porous nanofibrous materials by high-voltage electrospinning

A high-voltage electrospinning and nanofiber technology, which is applied in electrospinning, fiber treatment, chemical instruments and methods, etc., can solve the problems of high cost of organic sewage treatment, poor reuse times, and limited application of porous nanofiber materials. , to achieve excellent adsorption effect, uniform shape, and enhance the effect of shape

Active Publication Date: 2022-05-10
JILIN TEACHERS INST OF ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the porous nanofiber material prepared by the existing high-voltage electrospinning method has a relatively excellent adsorption effect on organic wastewater, the number of repeated uses is relatively poor. After about 10 times of adsorption and use, the adsorption of impurity components in organic wastewater The rate is as low as less than 50%, which increases the cost of organic wastewater treatment and limits the application of porous nanofiber materials in the field of organic wastewater treatment.

Method used

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  • A method for preparing porous nanofibrous materials by high-voltage electrospinning

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Embodiment 1

[0024] A method for preparing a porous nanofibrous material by high-voltage electrospinning, comprising the following steps:

[0025] (1) Poly-L-lactic acid is dissolved in a solvent system with chloroform as the main solvent and methanol and isopropanol as co-solvents to obtain a spinning solution, wherein the volume ratio of chloroform, methanol and isopropanol 10:1:1, the mass fraction of poly-L-lactic acid dissolved in the spinning solution is 10%;

[0026] (2) After dissolving praseodymium oxide and zirconia with nitric acid solution, the rare earth nitric acid solution is prepared, which is added to the spinning solution, and after mixing and stirring evenly, ammonia water is continuously added to it, stirring while adding, until the pH value is After 2.6, obtain the spinning solution, finally add its mass 1% magnesium stearate in the spinning solution, wherein the mass fraction of nitric acid solution is 10%, and the mass ratio of praseodymium oxide, zirconium oxide and...

Embodiment 2

[0031] A method for preparing a porous nanofibrous material by high-voltage electrospinning, comprising the following steps:

[0032] (1) Poly-L-lactic acid is dissolved in a solvent system with chloroform as the main solvent and methanol and isopropanol as co-solvents to obtain a spinning solution, wherein the volume ratio of chloroform, methanol and isopropanol 10:1:1, the mass fraction of poly-L-lactic acid dissolved in the spinning solution is 13%;

[0033] (2) After dissolving praseodymium oxide and zirconia with nitric acid solution, the rare earth nitric acid solution is prepared, which is added to the spinning solution, and after mixing and stirring evenly, ammonia water is continuously added to it, stirring while adding, until the pH value is After 2.8, the spinning solution is obtained, wherein the mass fraction of nitric acid solution is 10-15%, the mass ratio of praseodymium oxide, zirconium oxide and nitric acid solution is 1:5:30, and the mass ratio of rare earth...

Embodiment 3

[0037] A method for preparing a porous nanofibrous material by high-voltage electrospinning, comprising the following steps:

[0038] (1) Poly-L-lactic acid is dissolved in a solvent system with chloroform as the main solvent and methanol and isopropanol as co-solvents to obtain a spinning solution, wherein the volume ratio of chloroform, methanol and isopropanol 10:1:1, the mass fraction of poly-L-lactic acid dissolved in the spinning solution is 15%;

[0039] (2) After dissolving praseodymium oxide and zirconia with nitric acid solution, the rare earth nitric acid solution is prepared, which is added to the spinning solution, and after mixing and stirring evenly, ammonia water is continuously added to it, stirring while adding, until the pH value is After 3.0, the spinning solution is obtained, wherein the mass fraction of nitric acid solution is 15%, the mass ratio of praseodymium oxide, zirconium oxide and nitric acid solution is 1:6:30, and the mass ratio of rare earth ni...

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Abstract

The invention discloses a method for preparing a porous nanofiber material by a high-voltage electrospinning method, which comprises the following steps: (1) dissolving poly-L-lactic acid in chloroform as a main solvent and methanol and isopropanol as a co-solvent (2) After dissolving praseodymium oxide and zirconium oxide with nitric acid solution, a rare earth nitric acid solution was prepared, which was added to the spinning solution, mixed and stirred, and ammonia water was continuously added therein, obtaining a spinning solution; (3) adding the spinning solution into a spinning device for spinning to obtain a precursor fiber; (4) sintering the precursor fiber to obtain a porous nanofiber. The porous nanofiber prepared by the present invention has a small fiber diameter, and the specific surface area of ​​the fiber is relatively large, and the composite porous nanofiber prepared at the same time has a high porosity, uniformity and good shape, so it has an excellent effect on organic waste in organic wastewater. Adsorption effect, and can be used repeatedly.

Description

technical field [0001] The invention relates to the technical field of preparation of porous nanofiber materials, in particular to a method for preparing porous nanofiber materials by high-voltage electrostatic spinning. Background technique [0002] After continuous improvement, the electrospinning device has basically taken shape. It mainly consists of three parts: high voltage power supply, push device and receiver device. The working procedure of electrospinning is generally to draw an appropriate amount of polymer solution or melt into the syringe, then connect the syringe to the propulsion device, and clamp the positive electrode clip of the high-voltage electrostatic field generator to the needle of the syringe to form a closed circuit. , use the push device to slowly push out the spinning solution in the syringe, and when the solution starts to flow out of the spinneret, turn on the DC voltage power supply and adjust the voltage until the filamentous substance can b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08D01D5/00B01J20/26B01J20/28C02F1/28C02F101/30
CPCD01F9/08D01D5/003D01D5/0092D01D5/0069D01D5/0061B01J20/262B01J20/28023C02F1/285C02F2101/30
Inventor 张朝群李世哲王也铭
Owner JILIN TEACHERS INST OF ENG & TECH
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