Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of preparation method of three-dimensional hydrophobic tubular nanofiber membrane

A nanofiber membrane and hydrophobic nanotechnology are applied in the field of preparation of three-dimensional hydrophobic tubular nanofiber membranes, which can solve the problems of complex preparation process of hydrophobic membranes, poor mechanical properties of hydrophobic membranes, low self-supporting ability, etc., and improve the anti-wetting effect. , high hydrophobicity, high self-supporting ability

Active Publication Date: 2022-04-01
TIANJIN POLYTECHNIC UNIV
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of traditional hydrophobic membranes is complicated and the cost of use is high, and the general method of manufacturing hydrophobic membranes is mainly to modify the two-dimensional hydrophobic layer by using low surface energy materials or by increasing the surface roughness.
However, during the long-term wetting process, the air at the water-air-solid interface disappears, resulting in complete wetting of the surface, which makes these films significantly less hydrophobic.
In addition, traditional hydrophobic membranes have poor mechanical properties and low self-supporting ability.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of three-dimensional hydrophobic tubular nanofiber membrane
  • A kind of preparation method of three-dimensional hydrophobic tubular nanofiber membrane
  • A kind of preparation method of three-dimensional hydrophobic tubular nanofiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) In terms of mass fraction, the formula of the first casting solution is: 13% of polyvinyl chloride, 52.2% of N,N-dimethylformamide, and 34.8% of tetrahydrofuran; the formula of the second casting solution is: 4 % SiO 2 , 57.6% of N,N-dimethylformamide, 38.4% of tetrahydrofuran.

[0033] The first casting solution preparation step is: adding polyvinyl chloride to a mixed solvent of N,N-dimethylformamide and tetrahydrofuran (V / V=3:2), stirring for 3 hours at a temperature of 40°C, Obtain a uniform casting solution;

[0034] The second casting solution preparation step is: first SiO 2 (40nm) was added into a mixed solvent of N,N-dimethylformamide and tetrahydrofuran (V / V=3:2) and mechanically stirred for 0.5h, then stirred and dissolved at a temperature of 40°C for 3h to obtain Uniform casting solution;

[0035] 2) The casting solution obtained in step 1) is left to defoam at room temperature;

[0036] 3) Turn on the temperature and humidity controller of the elect...

Embodiment 2

[0040] 1) In terms of mass fraction, the formula of the first casting solution is: 13% of polyvinyl chloride, 52.2% of N,N-dimethylformamide, 34.8% of tetrahydrofuran (the formula is the same as in Example 1); component two The formulation is: 2% SiO 2 , 58.8% of N,N-dimethylformamide, 39.2% of tetrahydrofuran.

[0041]The preparation step of the first casting solution is: add polyvinyl chloride to the mixed solvent (3:2) of N,N-dimethylformamide and tetrahydrofuran, stir and dissolve at a temperature of 40°C, and the stirring time is 3h , to obtain a uniform casting solution;

[0042] The second casting solution preparation step is: SiO 2 (40nm) into a mixed solvent of N,N-dimethylformamide and tetrahydrofuran (3:2) and mechanically stirred for 0.5h, then stirred and dissolved at a temperature of 40°C for 3h to obtain a uniform casting solution ;

[0043] 2) The casting solution obtained in step 1) is left to defoam at room temperature;

[0044] 3) Turn on the temperatur...

Embodiment 3

[0048] 1) In terms of mass fraction, the formula of the first casting solution is: 15% polyvinylidene fluoride, 0.05% anhydrous lithium chloride, 42.5% N,N-dimethylacetamide, 42.5% acetone; The formula of the second casting liquid is: 60wt% polytetrafluoroethylene emulsion (aqueous solution).

[0049] The preparation step of the first casting solution is: adding polyvinylidene fluoride and anhydrous lithium chloride to a mixed solvent (1:1) of N,N-dimethylacetamide and acetone, and at a temperature of 40°C Stir to dissolve, and the stirring time is 3 hours to obtain a uniform casting solution;

[0050] 2) The casting solution obtained in step 1) is left to defoam at room temperature;

[0051] 3) Turn on the temperature and humidity controller of the electrospinning machine, and control the temperature at 30° C. and the humidity at 60%.

[0052] Put the polyester braided tube on the roller, and then set the relevant parameters of electrospinning. Pour the two components into...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a three-dimensional hydrophobic tubular nanofiber membrane, comprising: uniformly dissolving a hydrophobic polymer in a mixed solvent to form a first casting solution; using the solution of hydrophobic nanoparticles as a second casting solution; The first and second casting solutions are respectively placed in the first and second spinning injectors, and under certain conditions, the nanofibers are collected on a receiver equipped with a tubular support material, and the tubular braided tube is removed after spinning , after the solvent is volatilized, the nanofiber film is prepared; wherein, the first and second spinning injectors are respectively located on the upper front and upper rear of the receiver, and in a plane passing through the center of the receiver width and perpendicular to the axis of the receiver . The membrane prepared by the method has high porosity, high mechanical strength, good thermal stability, good lipophilicity and hydrophobicity, the long-term separation efficiency is still greater than 95%, and has excellent separation stability and reusability.

Description

technical field [0001] The invention relates to the field of nanofiber membrane preparation, in particular to a preparation method of a three-dimensional hydrophobic tubular nanofiber membrane. Background technique [0002] At present, membrane separation technology has been widely used and developed in seawater desalination, water treatment, printing and dyeing, food, medicine, petroleum and other fields due to its high efficiency, low pollution, low energy consumption, and simple operation process. [0003] Hydrophobic membrane is a kind of membrane, and the hydrophobic stability of hydrophobic membrane is a key issue in the application process of hydrophobic membrane. The production process of traditional hydrophobic membranes is complicated and the cost of use is high, and the general method of manufacturing hydrophobic membranes is mainly to modify the two-dimensional hydrophobic layer by using low surface energy materials or by increasing the surface roughness. Howeve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/04B01D67/00
CPCB01D69/04B01D67/0002B01D2325/38B01D2325/24
Inventor 刘海亮徐红燕肖长发
Owner TIANJIN POLYTECHNIC UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com