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Preparation method of phenolic aldehyde-based super-hydrophilic carbon nanofiber net film

A carbon nanofiber and nanofiber technology, which is applied in the field of separation membrane material preparation, can solve the problem that the output and size of carbon nanofiber membranes are easily limited by vapor phase growth efficiency, and it is difficult to effectively guarantee the structural stability of suction filtration devices and membrane materials. Due to the low degree of entanglement between the fibers of the nanofiber membrane, the effects of stable structure and physicochemical properties, diverse sample sizes and a wide range of sources are achieved.

Active Publication Date: 2021-11-05
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process of preparing carbon nanofiber membranes by this technology is relatively complicated, and the yield and size of the obtained carbon nanofiber membranes are easily limited by the efficiency of vapor phase growth and the suction filtration device.
In addition, the degree of entanglement between fibers in the carbon nanofiber membrane prepared by suction filtration deposition is low, and the structural stability of the membrane material is difficult to be effectively guaranteed.

Method used

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  • Preparation method of phenolic aldehyde-based super-hydrophilic carbon nanofiber net film
  • Preparation method of phenolic aldehyde-based super-hydrophilic carbon nanofiber net film
  • Preparation method of phenolic aldehyde-based super-hydrophilic carbon nanofiber net film

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Embodiment 1

[0046] A kind of phenolic base ultra-hydrophilic carbon nanofiber mesh film and preparation method thereof, concrete steps are as follows:

[0047] Step (1): Take the mixture of thermoplastic phenolic resin and thermosetting phenolic resin as raw material according to the mass ratio of 1:9, use polyacrylonitrile as accompanying spinning polymer, use stannous chloride as additive, and use N,N-di Methyl formamide is used as a solvent, the mass fraction of the phenolic resin mixture is 7wt%, the mass fraction of polyacrylonitrile is 10wt%, and the mass fraction of stannous chloride is 1wt%, and the spinning solution is prepared by fully stirring at room temperature.

[0048] Step (2): The spinning liquid is added to a multi-nozzle electrospinning machine equipped with a uniform-speed reciprocating spraying device and a fiber receiving substrate for electrospinning. The fiber receiving substrate is aluminum foil, the spinning voltage is 25kV, and the receiving distance is 20cm, th...

Embodiment 2

[0054] A kind of phenolic base ultra-hydrophilic carbon nanofiber mesh film and preparation method thereof, concrete steps are as follows:

[0055] Step (1): Take a mixture of thermoplastic phenolic resin and thermosetting phenolic resin as a raw material according to a mass ratio of 1:9, use polyvinyl butyral as a companion spinning polymer, use stannous chloride as an additive, and use N , N-dimethylformamide is the solvent, the mass fraction of the phenolic resin mixture is 5wt%, the mass fraction of polyvinyl butyral is 5wt%, and the mass fraction of stannous chloride is 7wt%, fully stirred at room temperature to prepare spinning solution.

[0056] Step (2): The spinning liquid is added to a multi-nozzle electrospinning machine equipped with a uniform-speed reciprocating spraying device and a fiber receiving substrate for electrospinning. The fiber receiving substrate is aluminum foil, the spinning voltage is 25kV, and the receiving distance is 20cm, the ambient temperatu...

Embodiment 3

[0061] A kind of phenolic base ultra-hydrophilic carbon nanofiber mesh film and preparation method thereof, concrete steps are as follows:

[0062] Step (1): Take water-soluble phenolic resin (thermoplastic and thermosetting mixture) as the raw material according to the mass ratio of 2:8, use polyvinyl alcohol as the companion spinning polymer, use silica nanoparticles as the additive, and use water as the Solvent, the mass fraction of the phenolic resin mixture is 10wt%, the mass fraction of polyvinyl alcohol is 8wt%, the mass fraction of silica nanoparticles is 6wt%, the water bath is heated at 60 ° C and stirred thoroughly, and then ultrasonic dispersion treatment is used for 15 minutes to obtain the spinning solution.

[0063] Step (2): The spinning solution is added to a multi-nozzle electrospinning machine equipped with a uniform speed reciprocating spraying device and a fiber receiving substrate for electrospinning. The fiber receiving substrate is a metal mesh, the spin...

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Abstract

The invention discloses a phenolic aldehyde-based super-hydrophilic carbon nanofiber net film and a preparation method thereof, wherein the preparation method comprises the steps: firstly, adding a mixture of thermoplastic phenolic resin and thermosetting phenolic resin, a spinning polymer and hydrophilic nanoparticles or a precursor of the hydrophilic nanoparticles into a solvent, stirring and dissolving to obtain a spinning solution, then carrying out electrostatic spinning, and preparing a composite precursor nano-fiber net film; performing heat treatment on the composite precursor nano-fiber net film, and performing multi-temperature-section carbonization treatment under the protection of high-purity nitrogen to prepare a primary carbon nano-fiber net film; and finally performing surface hydrophilicity enhancement treatment on the primary carbon nano-fiber net film to obtain the super-hydrophilic carbon nano-fiber net film. According to the method disclosed by the invention, a mixture of thermoplastic phenolic resin and thermosetting phenolic resin is used as a main carbon source, the hydrophilic nanoparticles are introduced, and after surface hydrophilicity enhancement treatment, the carbon nanofiber net film with a super-hydrophilic characteristic is obtained and can be used for efficient separation and purification of an oil-in-water type oil-water mixture.

Description

technical field [0001] The invention belongs to the technical field of preparation of separation membrane materials, and in particular relates to a preparation method of a phenolic-based superhydrophilic carbon nanofiber web membrane. Background technique [0002] In recent years, due to the frequent occurrence of crude oil spill accidents and the increase in the discharge of oily sewage generated in industrial and agricultural activities, the ensuing global oil pollution of water bodies has posed a major threat to the ecological environment and human health. Purification is imminent. The effective separation of highly mixed or emulsified oil-water mixture is the key step to realize the purification of oily sewage. Among many oil-water separation technologies, membrane separation method has better interception performance and wide application range because it is purely physical and has no secondary pollution. It has become an important development direction of oily sewage p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D71/16B01D71/34B01D71/38B01D71/42B01D71/58B01D69/02B01D67/00
CPCB01D71/021B01D71/38B01D71/42B01D71/16B01D71/34B01D71/58B01D69/02B01D67/0079B01D2325/36Y02A20/204
Inventor 葛建龙陈鸿肖颍黄卓单浩如刘其霞季涛
Owner NANTONG UNIVERSITY
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