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A composite nanofibrous membrane of β-feooh/polyacrylonitrile and its preparation method and application

A technology of composite nanofibers and nanofiber membranes, applied in the field of materials, can solve the problems of anti-pollution ability, poor self-cleaning ability, poor anti-pollution ability of organic substances, poor stability performance, etc., so as to improve hydrophilicity, facilitate adsorption, improve Wetting effect

Active Publication Date: 2022-04-01
成都石大力盾科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the natural nature of the polymer, the polyacrylonitrile fiber membrane has poor anti-pollution ability against organic matter, and it is difficult to clean it after pollution; in addition, water pollution often comes from oil leakage and industrial discharge, and the wastewater itself faced by the separation membrane It is a complex system, including soluble dyes, heavy metals, and insoluble organic matter; and the environment faced by the separation membrane may also be a harsh and complex environment of acid, alkali, salt, and organic reagents; the existing polyacrylonitrile nanofiber membrane Commonly used in oil-water separation, removal of dyes and heavy metals, but polyacrylonitrile nanofiber membrane has poor anti-pollution ability, self-cleaning ability, etc., and has poor stability in organic solvents

Method used

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  • A composite nanofibrous membrane of β-feooh/polyacrylonitrile and its preparation method and application
  • A composite nanofibrous membrane of β-feooh/polyacrylonitrile and its preparation method and application
  • A composite nanofibrous membrane of β-feooh/polyacrylonitrile and its preparation method and application

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preparation example Construction

[0038] The preparation method of a composite nanofiber membrane of β-FeOOH / polyacrylonitrile provided by the embodiment of the present invention comprises the following steps:

[0039] Preparation of polyacrylonitrile nanofiber membrane: mix polyacrylonitrile powder and N,N-dimethylformamide solution evenly to make spinning solution, and then spin polyacrylonitrile nanofiber membrane through electrospinning device, polypropylene The ratio of nitrile powder to N,N-dimethylformamide solution is 1-1.4g:10mL.

[0040] Among them, when the temperature is low, it is easy to cause the solution to be reduced by fluidity, resulting in the blockage of the spinneret. When the temperature is high, it is easy to cause the excessive volatilization of N,N-dimethylformamide in the solution, affecting The formation of polyacrylonitrile nanofiber membrane; when the voltage is low, the electric field force is too small, the electrostatic field force cannot overcome the surface tension of the sol...

Embodiment 1

[0059] A preparation method of a composite nanofibrous membrane of β-FeOOH / polyacrylonitrile, comprising the following steps:

[0060] Preparation of polyacrylonitrile nanofiber membrane: Mix 1.2% polyacrylonitrile powder with 10mL N,N-dimethylformamide solution to make a spinning solution, and then spin it into polyacrylonitrile nanofiber membrane through an electrospinning device. Then dry under vacuum conditions, wherein the spinning conditions are: the spinning temperature is 35°C, the spinning voltage is 25kv, the receiving distance is 20cm, the ambient humidity is 50%, and the flow rate is 1mL / h. For: drying temperature 60 ℃, drying time 12h.

[0061] Stabilization treatment: The polyacrylonitrile nanofiber membrane was subjected to gradient temperature rise treatment, kept at 238°C for 0.5h, at 248°C for 0.5h, and at 260°C for 0.5h, then took it out and cooled it to Stabilized polyacrylonitrile nanofibers were prepared at room temperature;

[0062] Biomineralization t...

Embodiment 2

[0064] A preparation method of a composite nanofibrous membrane of β-FeOOH / polyacrylonitrile, comprising the following steps:

[0065] Preparation of polyacrylonitrile nanofiber membrane: Mix 1g polyacrylonitrile powder with 10mL N,N-dimethylformamide solution to make a spinning solution, and then spin it into a polyacrylonitrile nanofiber membrane through an electrospinning device. Then dry under vacuum conditions, wherein the spinning conditions are: spinning temperature is 30°C, spinning voltage is 20kv, receiving distance is 18cm, ambient humidity is 45%, and flow rate is 0.6mL / h. The conditions are: the drying temperature is 55°C, and the drying time is 10 hours.

[0066] Stabilization treatment: The polyacrylonitrile nanofiber membrane is subjected to gradient temperature rise treatment, kept at 235°C for 2h, kept at 245°C for 2h, kept at 258°C for 2h, and then taken out and cooled to room temperature. Stabilized polyacrylonitrile nanofibers;

[0067]Biomineralization ...

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Abstract

The invention provides a β-FeOOH / polyacrylonitrile composite nanofiber membrane and a preparation method and application thereof, belonging to the technical field of materials. A preparation method of a β-FeOOH / polyacrylonitrile composite nanofiber membrane, comprising the following steps: preparation of a polyacrylonitrile nanofiber membrane: preparing a polyacrylonitrile nanofiber membrane by electrospinning; stabilization treatment: adding polypropylene The nitrile nanofiber membrane is subjected to gradient heating treatment; biomineralization treatment: the ferric chloride solution and hydrochloric acid are prepared into a mixed solution in a volume ratio of 2:1, and the stabilized polyacrylonitrile nanofiber membrane is placed in the mixed solution Stir for 1-3min, then react at 55-65°C for 10-14h, then wash and dry to obtain a β-FeOOH / polyacrylonitrile composite nanofiber membrane. It has good stability and mechanical properties, as well as super-hydrophilic-underwater super-oleophobic properties, high adsorption efficiency and recyclable use.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a composite nanofiber membrane of β-FeOOH / polyacrylonitrile and its preparation method and application. Background technique [0002] Electrospinning technology is a general method to prepare fibers with diameters ranging from micrometers to nanometers. The concept of electrospinning can be traced back to 1745. After decades of development, electrospun fibers have potential applications in various fields, such as filtration, protective textiles, drug delivery, tissue engineering, electronic and photonic devices, sensors and Catalysis; Among them, in terms of sewage treatment, recent research is devoted to the preparation of nanofiber adsorption membranes and filtration membranes by electrospinning; membrane materials composed of nanofibers have high specific surface area and highly connected nanoscale pore structure inside , and has the characteristics of adjustabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D04H1/43
CPCD04H1/728D04H1/43D10B2505/04
Inventor 何毅张李云范毅马兰石恒李双双钟菲李振宇
Owner 成都石大力盾科技有限公司
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