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Polyamide composite film prepared by steam-assisted electrostatic spraying, preparation method and application

An electrostatic spraying and polyamide technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problem of wide pore size distribution of the separation layer, and achieve high selective separation, low surface roughness, and high utilization.

Active Publication Date: 2021-11-16
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of wide pore size distribution in the separation layer of polyamide composite membranes in the prior art, the present invention proposes a method for preparing polyamide composite membranes by steam-assisted electrostatic spraying, which can be prepared by steam-assisted electrostatic spraying interfacial polymerization method. Polyamide Composite Membrane with Narrow Pore Size Distribution

Method used

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  • Polyamide composite film prepared by steam-assisted electrostatic spraying, preparation method and application
  • Polyamide composite film prepared by steam-assisted electrostatic spraying, preparation method and application

Examples

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Effect test

Embodiment 1

[0048] This embodiment provides a method for preparing a polyamide composite film by steam-assisted electrostatic spraying, comprising the following steps:

[0049] S1 Fix the polyethersulfone ultrafiltration membrane on the receiving roller of the electrostatic spraying equipment;

[0050] S2 configuration concentration is the piperazine aqueous solution of 0.24wt% and the trimesoyl chloride n-hexane solution of 0.08wt%;

[0051] S3 Put the solution obtained in step S2 into a syringe, and install it on an electrostatic spraying equipment for electrostatic spraying to form a film. The electrostatic spraying parameters are as follows: nozzle diameter 0.7mm, voltage 10kV, receiving distance 10cm, propulsion speed 1.0mL / h, electrostatic spraying equipment The lateral movement speed is 100mm / min, the speed of the receiving roller is 80rpm, the temperature of the spraying environment is 30°C, the humidification is carried out with pure water, the humidity of the spraying environmen...

Embodiment 2

[0063] This embodiment provides a method for preparing a polyamide composite film by steam-assisted electrostatic spraying, comprising the following steps:

[0064] S1 Fix the polyethersulfone ultrafiltration membrane on the receiving roller of the electrostatic spraying equipment;

[0065] S2 configuration concentration is the piperazine aqueous solution of 0.24wt% and the trimesoyl chloride n-hexane solution of 0.08wt%;

[0066] S3 Put the solution obtained in step S2 into a syringe, and install it on an electrostatic spraying equipment for electrostatic spraying to form a film. The electrostatic spraying parameters are as follows: nozzle diameter 0.7mm, voltage 10kV, receiving distance 10cm, propulsion speed 1.0mL / h, electrostatic spraying equipment The lateral movement speed is 100mm / min, the speed of the receiving roller is 80rpm, the spraying environment temperature is 30°C, the humidification is carried out with pure water, the spraying environment humidity is adjusted ...

Embodiment 3

[0070] This embodiment provides a method for preparing a polyamide composite film by steam-assisted electrostatic spraying, comprising the following steps:

[0071] S1 Fix the polyethersulfone ultrafiltration membrane on the receiving roller of the electrostatic spraying equipment;

[0072] S2 configuration concentration is the piperazine aqueous solution of 0.24wt% and the trimesoyl chloride n-hexane solution of 0.08wt%;

[0073]S3 Put the solution obtained in step S2 into a syringe, and install it on an electrostatic spraying equipment for electrostatic spraying to form a film. The electrostatic spraying parameters are as follows: nozzle diameter 0.7mm, voltage 10kV, receiving distance 10cm, propulsion speed 1.0mL / h, electrostatic spraying equipment The lateral movement speed is 100mm / min, the receiving roller speed is 80rpm, the spraying environment temperature is 30°C, and 10% ethanol aqueous solution is used for humidification, and the spraying environment humidity is adj...

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Abstract

The invention discloses a method for preparing a polyamide composite film by steam-assisted electrostatic spraying, and belongs to the field of polyamide composite film preparation. The method comprises the following steps: S1, adjusting the relative humidity of the surrounding of electrostatic spraying equipment to 80%-90%; S2, taking an amine monomer solution and an acyl chloride monomer solution as raw materials, and respectively putting the two raw materials into a spraying system of the electrostatic spraying equipment; S3, wrapping a polymer ultrafiltration film on a receiving roller of the electrostatic spraying equipment, setting electrostatic spraying process parameters, and performing electrostatic spraying; and S4, taking down the composite polymer film after electrostatic spraying, and carrying out heat treatment for 5-20 minutes in an environment with the temperature of 50-80 DEG C, so as to obtain a polyamide composite film finished product. The polyamide composite film with narrow pore size distribution can be prepared, the method is simple and easy to implement, the selective separation performance of the film in water treatment can be improved, and the application range of the film is greatly expanded.

Description

technical field [0001] The invention relates to the field of polyamide composite film preparation, more specifically, relates to a polyamide composite film prepared by steam-assisted electrostatic spraying, a preparation method and application thereof. Background technique [0002] Nanofiltration and reverse osmosis technologies have been widely used in various water treatment processes. The commercial nanofiltration membranes that currently dominate the market are mainly prepared by interfacial polymerization. Nanofiltration and reverse osmosis membranes are currently widely used in many fields such as industrial wastewater treatment, desalination, pure water production, and seawater desalination. At present, a variety of strategies have been developed for the improvement of membrane permeation flux, but from the perspective of the entire membrane separation process, the simple permeation flux improvement has limited contribution to the improvement of membrane separation sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/12B01D71/56C02F1/44C02F103/08C02F103/04
CPCB01D67/0006B01D67/0002B01D69/125B01D71/56C02F1/441C02F1/442B01D2323/26C02F2103/08Y02A20/131
Inventor 王建强刘富张渭琳林海波
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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