Multilayer Composite Nanofiber Membrane and Its Application

A nanofiber membrane and multi-layer composite technology, which is applied in the direction of layered products, metal layered products, synthetic resin layered products, etc., can solve the problems of low mechanical strength and high filtration resistance of electrospun nanofiber membranes, and achieve resistance Small size, high filtration efficiency and low cost

Active Publication Date: 2018-04-03
YANTAI LVSHUIFU MEMBRANE MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, electrospun nanofiber membranes have problems such as low mechanical strength and high filtration resistance, which need to be optimized in industrial applications.

Method used

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  • Multilayer Composite Nanofiber Membrane and Its Application
  • Multilayer Composite Nanofiber Membrane and Its Application
  • Multilayer Composite Nanofiber Membrane and Its Application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0028] A PET support layer with a filament diameter of 10 microns and a weight per unit area of ​​80 g / m was prepared by meltblowing 2 , with a thickness of 200 microns, using electrospinning technology to prepare a PET interception layer with a diameter of 300 nanometers of filaments on the surface of the PET thick fiber membrane, and a thickness of 100 microns. They are respectively used in the fields of air filtration, membrane distillation desalination and oil-water separation.

[0029] (1) The composite fiber membrane is used for air filtration, and the removal efficiency of PM 2.5 is 100%.

[0030] (2) After the composite fiber membrane is hot-pressed, the contact angle of the intercepting layer to water reaches 140°, which is used for membrane distillation feed liquid for desalination and desalination of seawater. When the temperature difference between the two sides is 50 degrees, the water flux is 30LMH, and the cut-off The salt rate is 99.9%. The composite membrane...

Embodiment 4-6

[0033] Prepare a PP support layer with a fiber diameter of 5 microns by melt blowing, and a weight per unit area of ​​100 g / m 2 , with a thickness of 150 microns, using electrospinning technology to prepare a PVDF nanofiber trapping layer with a diameter of 100 nanometers and a thickness of 50 microns on the surface of PP fibers.

[0034] (1) The composite fiber membrane is used for air filtration, and the removal efficiency of PM 2.5 is 100%.

[0035] (2) One minute after the composite fiber membrane is hot-pressed at 130 degrees, the contact angle of the PVDF interception layer to water reaches 135 degrees, which is used for desalination and desalination of seawater by membrane distillation feed liquid. When the temperature difference between the two sides is 30 degrees, the water flow The amount is 50LMH, and the salt cut-off rate is 99.8%.

[0036] (3) The obtained composite fiber membrane has a contact angle of 155° to water and 0° to oil, and has special wettability of ...

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Abstract

The invention relates to a multilayer composite nanofiber film and an application thereof. The composite fiber film has high retention efficiency and low resistance, and can be widely applied to the fields of air purification, oil and water separation, desalination of feed liquid, etc. The nanofiber film with a multilayer composite structure is prepared by macromolecular nanofiber of different diameters, the diameters gradually change from 10 nanometer to 10[mu]m, the separating functions change from low efficiency to high efficiency, removal rates for PM2.5 and PM10 dust particles reach 100%, and the removal rate for phage reaches above 99.9%. Water flux in a process of membrane distillation reaches 10-100LMH, and the salt rejection rate reaches above 90%. The nanofiber film can be used for treating oil-containing waste water, and the oil removing efficiency reaches above 90%.

Description

technical field [0001] The invention relates to a nanofiber membrane with a multilayer composite structure, which can be applied to air purification, oil-water separation and feed-liquid desalination. Background technique [0002] Nanofiber membranes have been widely used in the fields of separation membranes such as air filtration and material separation because of their fiber diameter reaching nanoscale, super large specific surface area, high porosity, and easy functionalization of the fiber surface. Nanofiber diameter and filling rate are the most important parameters affecting the air filtration performance of nanofiber membranes. The finer the fiber, the denser and more uniform the filling, the smaller the particles that can be filtered, the higher the filtration efficiency, but the greater the corresponding filtration resistance. The pore size of traditional fiber filter materials is generally between ten and tens of microns, and the filtration efficiency for PM2.5 i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/02B32B27/08B32B27/12B32B17/02B32B17/10B32B15/14
CPCB32B5/26B32B2262/02B32B2262/0223B32B2262/0238B32B2262/0261B32B2262/0276B32B2262/0284B32B2262/0292
Inventor 胡云霞周浩媛胡巧霞安晓婵刘中云
Owner YANTAI LVSHUIFU MEMBRANE MATERIAL
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