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Preparation of amphiphobic polyacrylonitrile-based nanofiber membrane for air purification

A polyacrylonitrile-based, nanofiber membrane technology, applied in the direction of fiber type, fiber treatment, wear-resistant fiber, etc., can solve the problems of surface wetting effect and wear-resistant application without in-depth discussion, and achieve wear-resistant strong effect

Pending Publication Date: 2022-03-18
NANJING POLYTECHNIC INSITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zhang Jiaojiao et al[15] modified the surface of PAN nanofibers by using the super adhesion of dopamine (DA), and investigated its oil-water separation performance, but only studied the membrane flux and mechanical properties, and did not discuss the surface wetting in depth. Wetting effect, abrasion resistance and its application in the field of oil / oil separation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Preparation of spinning solution and preparation of PAN fiber membrane

[0016] Weigh 2.4 g of PAN, put it into a 100 mL beaker, slowly add 15 g of DMF into the beaker with a dropper, then put the beaker into a water bath (80 °C) and heat until PAN is completely dissolved, then The solution in the beaker was poured into a 50 mL single-necked flask, and magnetically stirred at 80 °C for 12 h to prepare a spinning solution with a mass fraction of PAN of 13.8%. According to the above steps, the spinning solutions with mass fractions of PAN of 9.1%, 9.9%, 10.7%, 12.3%, and 15.3% were prepared respectively. The above-mentioned spinning solution was spun with a self-assembled electrospinning device, under the conditions of an applied spinning voltage of 15 kV, a distance between the spinneret and the receiving device of 15 cm, and a flow rate of the spinning solution of 0.5 mL / h The PAN fiber membrane was prepared as follows. According to the above steps, the spinning solut...

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Abstract

The invention discloses preparation of an amphiphobic polyacrylonitrile-based nanofiber membrane for air purification, which comprises the following steps: preparing a PAN nanofiber membrane by an electrostatic spinning method, and then wetting the surface of the membrane by using DA and G617 as treating agents. And the hydrophobic and oleophobic performance, the surface appearance and the chemical composition of the PAN film before and after modification are characterized. The modified PAN membrane has strong wear resistance and amphiphobic performance, and can be used in the fields of oil / water, oil / oil separation and oil-water emulsion separation.

Description

technical field [0001] The invention belongs to the field of membrane preparation. Background technique [0002] In recent years, it has been found in membrane distillation or filtration experiments that many hydrophobic membranes are prone to adsorb impurities, resulting in membrane fouling or wetting and reducing their performance. In order to solve such problems, it is necessary to modify the surface of the membrane to prepare an amphobic membrane. Amphiphobic membranes refer to membranes that are both hydrophobic and oleophobic, usually with low surface free energy, non-polluting, self-cleaning and other properties. Amphiphobic surfaces have broad application prospects in industrial and agricultural production and people's daily life, such as washing, textiles, pipeline transportation, magnesium-air batteries, etc. [0003] The techniques for preparing hydrophobic membranes include plasma method, sol-gel method and electrospinning method. Materials commonly used in el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/368D06M13/513D01F6/18D04H1/728D04H1/43B01D46/54B01D53/22D06M101/28
CPCD06M13/368D06M13/513D04H1/728D04H1/43B01D46/543B01D53/228D06M2101/28D06M2200/35B01D2258/06
Inventor 祁茜李冬燕蒋杰贺栋
Owner NANJING POLYTECHNIC INSITUTE