Air filter material based on carbon nano tube and preparation method thereof

An air filter material and carbon nanotube technology, which is applied in the fields of filtration and separation, separation methods, chemical instruments and methods, etc., can solve the damage of the intrinsic properties of carbon nanotubes, affect the quality of carbon nanotube membranes, and increase the resistance of carbon nanotube membranes. Advanced problems, achieve good industrial application prospects, good strength, and avoid the effect of material size and shape limitations

Active Publication Date: 2012-07-25
TSINGHUA UNIV
View PDF3 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, the intrinsic properties of carbon nanotubes will be destroyed, affecting the quality of carbon nanotube films
In addition, the solvent volatilization process after film formation by suction filtration will shrink the carbon nanotube film and reduce the porosity, which will eventually lead to an increase in the resistance of the carbon nanotube film during air filtration; (2) direct growth of carbon nanotube film by gas phase method used as air filter material
This method needs to strictly control the growth conditions, and the membrane area currently prepared is very small, which is not conducive to industrialization

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
  • Air filter material based on carbon nano tube and preparation method thereof
  • Air filter material based on carbon nano tube and preparation method thereof
  • Air filter material based on carbon nano tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1. Preparation of carbon nanotube air filter material based on quartz fiber filter medium

[0033] Quartz fiber filter media (such as figure 2 As shown in (a), the average diameter of the quartz fiber is 3 μm), which is placed in the heating section of the quartz sleeve (such as figure 1 The position shown in 6); take ferrocene as the catalyst, and place it at the mouth of the quartz tube (such as figure 1 The position shown in 3 in the middle), the temperature at the position of the catalyst in the reaction process is 120 ° C; with argon and hydrogen as protective atmosphere, ethylene as carbon source, the ratio is argon: hydrogen: ethylene=7: 1: 2, gas flow rate is 3 mm / s, the temperature is raised to 760 ° C, and the reaction is performed for 1 hour to obtain an air filter material based on carbon nanotubes, such as figure 2 As shown in (b), the average diameter of the carbon nanotubes is 25 nm.

[0034] The scanning electron microscope photo of the carb...

Embodiment 2

[0037] Example 2. Preparation of carbon nanotube air filter material based on carbon fiber filter medium

[0038] The carbon fiber filter medium (the average diameter of the carbon fiber is 5μm, in the form of a folded cloth) is placed in the heating section of the quartz sleeve (such as figure 1 The position shown in 6); take ferrocene as the catalyst, and place it at the mouth of the quartz tube (such as figure 1 The position shown in 3 in the middle), the temperature at the position of the catalyst in the reaction process is 120 ° C; with argon and hydrogen as protective atmosphere, ethylene as carbon source, the ratio is argon: hydrogen: ethylene=7: 1: 2, gas flow rate is 3 mm / s, the temperature is raised to 850° C., and the reaction is performed for 15 minutes to obtain an air filter material based on carbon nanotubes, and the average diameter of the carbon nanotubes is 25 nm.

Embodiment 3

[0039] Example 3. Preparation of carbon nanotube air filter material based on the folded quartz fiber filter medium

[0040] Place the folded quartz fiber filter medium (the average diameter of the quartz fiber is 3 μm) in the heating section of the quartz sleeve (such as figure 1 The position shown in 6); take ferrocene as the catalyst, and place it at the mouth of the quartz tube (such as figure 1 The position shown in 3 in the middle), the temperature at the position of the catalyst in the reaction process is 120 ° C; with argon and hydrogen as protective atmosphere, ethylene as carbon source, the ratio is argon: hydrogen: ethylene=7: 1: 2, gas flow rate is 3 mm / s, the temperature is raised to 760° C., and the reaction is performed for 1 hour to obtain an air filter material based on carbon nanotubes, and the average diameter of the carbon nanotubes is 25 nm.

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
melting pointaaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses an air filter materials based on a carbon nano tube and a preparation method thereof. The method comprises the following steps: taking a fibre filter medium as a substrate, and preparing the carbon nano tube on the substrate according to chemical vapor deposition method to obtain the product. The fibre filter medium is made of at least one of the group consisting of quartz fibre, carbon fiber, glass fibre, metal fibre and polymer fiber; according to the invention, the air filter materail based on the carbon nano tube comprises two-level structure so as to solve the problem that the intensity of the carbon nano tube membre is too low as air filter materails, the bulk density is too high, the resistance is too much and the clogging capacity is low, and to implement preparation for high-intensity, high-clogging-capacity, high-efficiency and low-resistance air filter material.

Description

technical field [0001] The invention relates to an air filter material based on carbon nanotubes and a preparation method thereof, and belongs to the technical field of air filter technology and material preparation. Background technique [0002] Particulate matter is the most common pollutant in the atmosphere. Studies have shown that the smaller the particle size of the particulate matter, the greater the harm to human health. This is because small particles can be deposited in the human lungs and even the blood circulatory system, causing respiratory diseases or thrombosis; on the other hand, due to the large specific surface area of ​​small particles, they can adsorb a large number of toxic substances such as viruses, bacteria, etc., further cause harm to the human body. At present, my country is in the process of formulating air quality monitoring standards for PM2.5 (that is, particle pollutants with a diameter of less than or equal to 2.5 μm in the air), while some E...

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 Applications(China)
IPC IPC(8): B01D39/14
Inventor 魏飞李朋张莹莹张如范
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap