Skip to main content

Flash-Ignited Multi-Walled Carbon Nanotubes Rundown

 
Multi-walled carbon nanotubes were discovered to ignite if exposed to an intense flash of light such as from a household camera flash or laser. The product is composed of thin diameter multi-walled carbon nanotubes, amorphous carbon and some Fe nanoparticles/nanopowder. Optical ignition and initiation of energetic materials could this far be only accomplished through lasers, with specific characteristics of high power, pulse length, wavelength, and a small target area that greatly inhibit their applications. A comparison of the reactions when subjected to a camera flash and a laser found that a camera flash unit produced a slow, surface propagated deflagration while a laser produced a much faster explosion-like result which was determined to be preferable for controllable initiation of energetic materials.
The phenomenon is proposed as a novel initiation method for fuels or explosives. Such way of light initiation of materials provides many advantages over traditional initiation methods such as reduced degradation of the initiator over time, reduced interference from electrical fields, improved safety and faster ignition by initiating many points of a material at once. Multi-walled carbon nanotubes flash-ignition phenomenon has been used to trigger the combustion of different fuel typologies and is slowly replacing the method of traditional spark-plug ignition. The implication is that energetic materials mixed with optically active nanotubes could be new ideal candidates for safety apparatus, such as the firing of bolts on space shuttle rockets and aircraft exit doors.
The product is manufactured by xylene pyrolysis using ferrocene as catalyst. A mechanism for the flash ignition of a carbon nanotube occurs in three stages. At the first stage, when exposed to a flash, oxidation of an ultradispersed impurity of metals in the carbon nanotubes occurs. At the second stage, heating by chemical reactions occurs. The final stage is the initiation of the combustion wave.
Flash ignition of multi-walled carbon nanotubes applications:
Flash ignition of multi-walled carbon nanotubes is used in combustion and propulsion sectors.
Flash ignition of multi-walled carbon nanotubes is used in ignition agents for fuel mixtures.
Flash ignition of multi-walled carbon nanotubes is used in aerospace industry.
Labels:

Comments

Post a Comment

Popular posts from this blog

Molybdenum Trioxide Nanoparticles/Nanopowder and Applications

General Information about Molybdenum Trioxide                                                     Molybdenum trioxide is chemical compound with the formula MoO3. Its chief application is as an oxidation catalyst and as a raw material for the production of molybdenum metal.  Molybdenum Trioxide  is a very light blue powder. Molybdenum Trioxide Nanoparticles/Nanopowder and Their Applications                                                    Like many  nanoparticles/nanopowder , Molybdenum Trioxide nanoparticles/nanopowder are used as catalysts. These catalysis reactions include hydrogenation catalysis and cracking catalysis. Molybdenum Trioxide nanoparticles/  nanopowder are useful for...
Post a Comment
Read more
Carbon Nanotubes Specifications and Properties Carbon Nanotubes, simply CNTs, are allotropes of carbon with a round and hollow nanostructure. These barrel shaped carbon molecules have crucial properties, which are significant for nanotechnology, hardware, optics and other different fields of materials science and innovation. The carbon nanotube’s excellent quality as a strong and firm material laid the basis on many applications. Not to mention carbon nanotubes exceptional heat conductivity, electrical and mechanical properties, Carbon Nanotubes are used as additives to diverse auxiliary materials. In terms of rigidity and flexibility Carbon Nanotubes are the stiffest and strongest materials. These quality outcomes from the covalent sp2 bonds framed between the individual carbon molecules. Unlike Graphene , Carbon Nanotubes are either conductive or semiconducting along the tubular hub. Carbon Nanotubes also have absorption, fluorescence properties. Bulk Carbon nanotubes are util...
Post a Comment
Read more

Hydroxyapatite Nanopowders and Their Applications

Hydroxyapatite, is a naturally occurring mineral form of calcium apatite with the formula Ca 5 (PO 4 ) 3 (OH). Pure hydroxyapatite powder is white. Naturally occurring apatites can, however, also have brown, yellow, or green colorations, comparable to the discolorations of dental fluorosis. Hydroxyapatite Nanopowder/Nanoparticles (50 nm, 99.95+%)  has been widely used as a biocompatible ceramic in many areas of medicine, but mainly for contact with bone tissue, due to its resemblance to mineral bone. In mammals, the skeleton presents a carbonated and partially substituted apatite, based on nanocrystal aggregates, and associated with collagen, building up 3-D structures present in various bone tissue conformations like trabecular or cancellous bone. There has been growing interest in developing bioactive synthetic ceramics that could closely mimic natural apatite characteristics. As mentioned before,  Hydroxyapatite Nanopowder  is the main inorganic constituent of bon...
Post a Comment
Read more