Process for manufacturing single-wall carbon nanotubes

a carbon nanotube and single-wall technology, applied in the direction of carbonsing rags, chemistry apparatus and processes, fibre chemical treatment, etc., can solve the problems of limiting the application high production costs of single-wall carbon nanotubes by using this technique, and relatively large quantities of low-purity materials

Inactive Publication Date: 2009-10-01
DEDIU VALENTIN +3
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020]At present there are no synthesis processes that allow to obtain significant quantities of high-quality single-wall carbon nanotubes at competitive prices.

Problems solved by technology

Although it is possible to achieve an exceptionally high quality of SWNTs grown in this manner, this technique has an important disadvantage, i.e., it allows only to produce fractions of a gram per hour.
Moreover, the production costs of single-wall carbon nanotubes by using this technique are currently very high, currently approximately 1000 euros per gram, and this limits its possible applications.
This technique produces relatively large quantities of low-purity material.
The subsequent purification stages provide equally low yields with respect to laser ablation, which has comparable costs.

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
  • Process for manufacturing single-wall carbon nanotubes
  • Process for manufacturing single-wall carbon nanotubes

Examples

Experimental program
Comparison scheme
Effect test

example

[0045]FIG. 1 illustrates the experimental layout used: the central part of a quartz tubular reactor 1 is heated by two electric high-temperature heaters 2, which maintain the temperature in the reactor at 1050° C. As an alternative to the second heater, it is possible to use a microwave antenna 11. At the center of the reactor, in a downward region, an opening 3 allows the entry of the pulsed electron beams that arrive from a channel-spark source 4 (shown schematically), which is provided as disclosed in U.S. Pat. No. 5,576,793. A needle valve 5 arranged at the left inlet of the reactor and two adjustable valves 6, 7, arranged respectively at the opposite end of the reactor and on the quartz neck 8 of the section that connects the reactor 1 to the spark to the channel-spark system 4, allow to maintain a flow of 5 normal cc / minute of argon in the reactor at a pressure of 1 mbar and a pressure of 2 10−2 mbar in the CSA system. A target 9, constituted by a graphite disk containing 0.5 ...

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
temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
Login to view more

Abstract

A process for manufacturing single-wall and multiwall carbon nanotubes, comprising the stage of ablation by pulsed electronic beams of a graphite target that contains metallic catalysts.

Description

TECHNICAL FIELD[0001]The present invention relates to a process for manufacturing single-wall carbon nanotubes.[0002]More specifically, the present invention relates to the preparation of nanoparticles (clusters) of carbon formed by nanotubes or nanofibers and particularly to the preparation of single-wall-nanotubes or SWNT.BACKGROUND ART[0003]Carbon nanotubes can be classified into two large categories: multiwall nanotubes and single-wall nanotubes. These two categories of nanotubes form two very different kinds of material in terms of structure and synthesis.[0004]Multiwall carbon nanotubes comprise a plurality of single-wall carbon nanotubes arranged concentrically.[0005]Nanotube physics is an interesting overlap of molecular physics along the transverse cross-section and of solid-state physics along the axis. In a manner similar to fullerene crystals, where the C60 molecules can be arranged in an orderly manner to form a crystal, the nanotubes can be arranged in bundles of nanot...

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(United States)
IPC IPC(8): D01F9/12C01B31/02
CPCB82Y30/00B82Y40/00H01J2237/3146C01B2202/02C01B2202/06C01B31/0233C01B32/162
Inventor DEDIU, VALENTINLOTTI, RICCARDOMATACOTTA, FRANCESCO CINOTALIANI, CARLO
Owner DEDIU VALENTIN
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