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Composite filter membrane with multidimensional pore structure and preparation method thereof

A pore structure, composite filtration technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of unsuitability for large-scale production and promotion, low mechanical strength, and high production costs, and achieve low production costs. , The production process is simple, and the filtering effect is good.

Active Publication Date: 2014-07-02
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods have higher industrial production costs and are not suitable for large-scale production and promotion.
In addition, the electrospun nanofibrous membrane-based filter material has very low mechanical strength compared with conventional nonwoven fibrous filter media.

Method used

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  • Composite filter membrane with multidimensional pore structure and preparation method thereof
  • Composite filter membrane with multidimensional pore structure and preparation method thereof
  • Composite filter membrane with multidimensional pore structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 0.1 g of montmorillonite, ultrasonically disperse in 26.9 mL of chloroform until uniformly dispersed, then add 2 g of PMMA, and stir at room temperature until a clear and transparent solution is obtained. Electrospinning is carried out through a multi-nozzle electrospinning device. The spinning voltage is 15kV, the spinning distance is 15cm, and the advancing speed is 0.5ml / h. The receiving device is a winding and unwinding device, and the surface is covered with PET spunbonded nonwoven base fabric. , the obtained porous composite nanofibers (transmission electron microscope picture as Figure 5 shown) is deposited on the surface of PET spunbonded nonwoven base fabric, and compounded by subsequent hot rolling device.

Embodiment 2

[0029] Weigh 0.2 g of montmorillonite, ultrasonically disperse it in 26.9 mL of chloroform until it is evenly dispersed, then add 2 g of PMMA, and stir at room temperature until it becomes a clear and transparent solution. Electrospinning is carried out through a multi-nozzle electrospinning device. The spinning voltage is 20kV, the spinning distance is 15cm, and the advancing speed is 0.8ml / h. The receiving device is a winding and unwinding device, and the surface is covered with PET spunbonded nonwoven base fabric. , the obtained porous composite nanofibers are deposited on the surface of the PET spunbonded nonwoven base fabric, and are composited by a subsequent hot rolling device.

Embodiment 3

[0031] Weigh 0.3 g of montmorillonite, ultrasonically disperse in 26.9 mL of chloroform until uniformly dispersed, then add 2 g of PMMA, and stir at room temperature until a clear and transparent solution is obtained. Electrospinning is carried out through a multi-nozzle electrospinning device. The spinning voltage is 15kV, the spinning distance is 15cm, and the advancing speed is 1.0ml / h. The receiving device is a winding and unwinding device, and the surface is covered with PET spunbonded nonwoven base fabric , the obtained porous composite nanofibers are deposited on the surface of the PET spunbonded nonwoven base fabric, and are composited by a subsequent hot rolling device.

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Abstract

The invention provides a composite filter membrane with a multidimensional pore structure and a preparation method thereof. The composite filter membrane comprises nonwoven base cloth and a porous composite nanofiber layer, wherein the nonwoven base cloth and the porous composite nanofiber layer are composited in a manner of hot rolling, and the porous composite nanofiber layer is prepared from a polymer and an additive. The preparation method comprises the following steps: adding the additive into a spinning solution solvent, carrying out ultrasonic treatment to achieve homodisperse, then adding the polymer, and stirring at room temperature until the solution is clear and transparent. A multiple-nozzle electrostatic spinning device is used for electrostatic spinning, and the obtained porous composite nanofibers are directly deposited on the surface of the nonwoven cloth and are composited through a subsequent hot rolling device. The composite filter membrane combines the advantages of common filter materials and nanofiber filter materials, has a good filtering effect, a simple production process and low production cost and is easy to realize large scale production.

Description

technical field [0001] The invention belongs to the technical field of nanometer functional materials, and in particular relates to a composite filter membrane with a multi-dimensional pore structure and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's industrialization and the rapid increase of social car ownership, the deterioration of air quality has intensified, and the continuous smog weather has had a great impact on human health and daily life. PM2.5 has become one of the most concerned indicators in today's society. . PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 μm in the atmosphere, also known as particulate matter that can enter the lungs. The development of high-performance filter materials is one of the effective measures to meet the increasingly stringent new national emission standards for industrial waste gas, coal-fired smoke and gradually increasing vehicle...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D69/12B01D67/00
Inventor 魏取福王清清徐阳李国辉
Owner JIANGNAN UNIV
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