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Preparation method of hydrophilic phenolphthalein polyethersulfone composite nanofiber ultrafiltration membrane

A technology of composite nanofibers and nanofiber membranes, applied in ultrafiltration, chemical instruments and methods, membranes, etc., can solve the problems that the hydrophilic modification of PES-C nanofiber composite ultrafiltration membranes is rarely mentioned, etc. Wide range of applications, improved hydrophobicity, and strong anti-pollution ability

Active Publication Date: 2018-09-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing literature reports, most of the PES-C ultrafiltration membranes prepared by the phase inversion method or immersion precipitation method are modified for heat resistance and hydrophilicity. For example, CN201110430250 discloses a hydrophilic phenolphthalein-based polymer The preparation method of the aryl ether sulfone alloy ultrafiltration membrane, but the research on the hydrophilic modification of the PES-C nanofiber composite ultrafiltration membrane prepared by the solution-blown spinning method is rarely mentioned

Method used

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  • Preparation method of hydrophilic phenolphthalein polyethersulfone composite nanofiber ultrafiltration membrane

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Embodiment 1

[0036] (1) Dissolve phenolphthalein polyethersulfone with an intrinsic viscosity of 1.0g / dL in DMF, prepare a 15wt% spinning solution, let it stand for defoaming, squeeze the spinning solution out of the spinning pinhole through a metering pump, and The nanofiber film is formed by air stretching and collection. The relevant process parameters are: spinneret diameter 0.8mm, propulsion speed 5ml / h per hole, spinning air pressure 0.08MPa, receiving distance 15cm, spinning time 2h, and the atmosphere used for spinning is nitrogen gas; the obtained nanofiber membrane was dried in vacuum at 80° C. for 10 h to obtain a PES-C nanofiber membrane.

[0037] (2) Prepare a 5wt% solution of PVPK30, add potassium persulfate as an initiator with a mass ratio of 2:1 to PVPK30, raise the temperature at 80°C for 5 hours, and obtain a PVPP solution.

[0038](3) Spray the PVPP solution in step (2) onto the surface of the PES-C nanofiber membrane in step (1) through a solution spraying device, ther...

Embodiment 2

[0044] (1) Dissolve phenolphthalein polyethersulfone with an intrinsic viscosity of 0.65g / dL in DMF, prepare a 25wt% spinning solution, let stand for defoaming, squeeze the spinning solution out of the spinning pinhole through a metering pump, and The nanofiber film is formed by air stretching and collection. The relevant process parameters are: spinneret diameter 0.7mm, propulsion speed 4ml / h per hole, spinning air pressure 0.12MPa, receiving distance 25cm, spinning time 2h, and the atmosphere used for spinning is Nitrogen, and vacuum-dry the obtained nanofiber membrane at 80° C. for 10 h to obtain a PES-C nanofiber membrane.

[0045] (2) Prepare a 3wt% solution of PVPK60, add sodium persulfate as an initiator with a mass ratio of 1:1 to PVPK60, and react at 70°C for 4 hours to obtain a PVPP solution.

[0046] (3) Spray the PVPP solution in step (2) onto the surface of the nanofiber membrane in step (1) through a solution spraying device, thereby obtaining the PES-C / PVPP comp...

Embodiment 3

[0050] (1) Dissolve phenolphthalein polyethersulfone with an intrinsic viscosity of 0.5g / dL in DMF, prepare a 30wt% spinning solution, let it stand for defoaming, squeeze the spinning solution out of the spinning pinhole through a metering pump, and The nanofiber membrane is formed by air stretching and collection. The relevant process parameters are: spinneret diameter 0.5mm, propulsion speed 5ml / h hole, spinning air pressure 0.2MPa, receiving distance 40cm, spinning time 2h, spinning atmosphere The obtained nanofiber membrane was dried under vacuum at 80° C. for 10 h under nitrogen gas to obtain a PES-C nanofiber membrane.

[0051] (2) Prepare a 2wt% solution of PVPK90, add ammonium persulfate as an initiator with a mass ratio of 1:2 to PVPK90, and react at 90°C for 2 hours to obtain a PVPP solution.

[0052] (3) Spray the PVPP solution in step (2) onto the surface of the PES-C nanofiber membrane in step (1) through a solution spraying device, thereby obtaining the PES-C / PVP...

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Abstract

The invention relates to a preparation method of a hydrophilic phenolphthalein polyethersulfone composite nanofiber ultrafiltration membrane. The preparation method comprises dissolving phenolphthalein polyethersulfone PES-C in an organic solvent to obtain a spinning solution, carrying out solution jet spinning, carrying out drying to obtain a PES-C nanofiber membrane, spray-coating the PES-C nanofiber membrane with a crosslinked polyvinylpyrrolidone PVPP solution and carrying out hot-pressing treatment. Compared with the existing widely used electrospinning technology, the preparation methodof the hydrophilic phenolphthalein polyethersulfone composite nanofiber ultrafiltration membrane has the advantages of high production efficiency, low energy consumption, wide application range and industrial production feasibility. The hydrophilic phenolphthalein polyethersulfone composite nanofiber ultrafiltration membrane has high hydrophilicity, thermal stability, acid and alkali corrosion resistance, high anti-pollution ability and long-lasting hydrophilicity, is favorable for industrial production and has a broad application prospect in the fields of microfiltration and ultrafiltration.

Description

technical field [0001] The invention belongs to the field of preparation of modified nanofiber membranes, in particular to a method for preparing hydrophilic phenolphthalein polyethersulfone composite nanofiber ultrafiltration membranes. Background technique [0002] Phenolphthalein polyethersulfone (PES-C) is a new type of semi-crystalline aromatic thermoplastic engineering plastic independently developed by my country. Its glass transition temperature is as high as 263°C and its heat resistance temperature is above 150°C. With a series of advantages such as fatigue resistance, radiation resistance, corrosion resistance and good dimensional stability, it has been widely used in high-tech fields such as aerospace, electronics, information, and energy. [0003] Phenolphthalein polyethersulfone (PES-C) is a hydrophobic polymer material. Therefore, in the field of sewage treatment, in order to overcome the defects of the material such as hydrophobicity and poor anti-pollution ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D61/14B01D69/08B01D67/00
CPCB01D61/145B01D67/0027B01D67/0088B01D69/08B01D69/081B01D71/68B01D2323/02B01D2325/22B01D2325/30
Inventor 胡祖明于俊荣王彦宋国城李静诸静
Owner DONGHUA UNIV
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