Carbon Nanotubes (CNTs): Strongest, lightest & most conductive material

cntCARBON NANOTUBES 

A carbon nanotube is a nanosize cylinder of carbon atoms. Imagine a sheet of carbon atoms, which would look like a sheet of hexagons. If you roll that sheet into a tube, you’d have a carbon nanotube. Carbon nanotube properties depend on how you roll the sheet. In other words, even though all carbon nanotubes are made of carbon, they can be very different from one another based on how you align the individual atoms. These carbon atoms align in different manners to give three different structures armchair, Zig-Zag & chiral.

With the right arrangement of atoms, you can create a carbon nanotube that’s hundreds of times stronger than steel, but six times lighter.

An individual tube consists of unique structures: 200X the strength and 5X the elasticity of steel; 5X the electrical conductivity (“ballistic transport”), 15X the thermal conductivity and 1,000X the current capacity of copper; at almost half the density of aluminum.

There are two types of CNTs: SWCNT & MWCNT

SWCNT: Most of SWCNTs have diameter near to 1nm. The concept of CNT structure is based on rolling of layer of graphene into a seamless cylinder. It can be metallic or semi-conducting.

MWCNT: It consists of multiple rolling of graphene layers. The interlayer distance in multiwalled nanotubes is close to the distance between graphene layers in graphite, approximately 3.4 Å. Beside of this, there are other forms of carbon nanotube like torus, nanobud, graphtizied CNT, Nitrogen doped CNT etc. All these forms are basically derivatives of CNT because of surface changes in CNT by chemical vapor deposition method or other chemical methods.

Specifications:

1) Pristine MWCNTs

Purity

> 95%

Outside Diameter

<8nm

Inside Diameter

2-5 nm

Average diameter

4.2 nm

Length

0.5-200 µm

SSA

476 m2/g

Color

black

Bulk density

0.48 g/cm3

True density

~2.1 g/cm3

Young’s modulus (Gpa)

~1200

Tensile strength (Gpa)

~150

Thermal conduct (W/m.k)

~1200

Viscosity

zero

Variants

2) Functionalized CNTs: COOH, OH, NH2

COOH- Functionalized

Purity

> 95%

Outside Diameter

<8nm

Inside Diameter

2-5 nm

Average diameter

4.2 nm

Length

0.5-200 µm

SSA

476 m2/g

Color

black

Bulk density

0.48 g/cm3

True density

~2.1 g/cm3

Young’s modulus (Gpa)

~1200

Tensile strength (Gpa)

~150

Thermal conduct (W/m.k)

~1200

Viscosity

zero

-COOH

> 5wt%

OH Functionalized:

Purity:

> 95%

Outside Diameter:

<8nm

Inside Diameter:

2-5 nm

Average diameter:

4.2 nm

Length:

0.5-200 µm

SSA

476 m2/g

Color

black

Bulk density

0.48 g/cm3

True density

~2.1 g/cm3

Young’s modulus (Gpa)

~1200

Tensile strength (Gpa)

~150

Thermal conduct (W/m.k)

~1200

Viscosity

zero

-OH

> 5wt%

3) Master Batches: PE, PP, PET

Application of CNTs :

  • Additives in polymers
  • Catalysts
  • Electron field emitters for cathode ray lighting elements
  • Flat panel display
  • Gas-discharge tubes in telecom networks
  • Electromagnetic-wave absorption and shielding
  • Energy conversion
  • Lithium-battery anodes
  • Hydrogen storage
  • Nanotube composites (by filling or coating)
  • Nanoprobes for STM, AFM, and EFM tips nanolithography, nanoelectrodes drug delivery sensors
  • Supercapacitor
  • CNT can be fabricated as electrical conductors, insulators, and semiconductors
  • Nanoelectronics – computer chips, Better capacitors that replace batteries, Flywheels
  • Surface processing
  • Biomedical applications
  • Pharmaceutical Industry: Carbon nanotubes in medicine – as Biosensors); Cancer treatment
  • Biotechnology: Biotech container—CNT can be filled with biological molecules, aiding.
  • Sports equipment—Stronger and lighter tennis rackets, bicycle parts, golf balls, golf clubs, and baseball bats.
  • Plastic equipments as Reinforcements in composites
  • Air pollution filter—CNT membranes can filter carbon dioxide from power plant emissions.
  • Textiles—CNT can make waterproof and/or tear-resistant fabrics
  • Polyethylene—Adding CNT to polyethylene can increase the polymer’s elastic modulus by 30%.
  • Concrete—CNT in concrete increase its tensile strength, and halt crack propagation
  • CNT springs—Single-walled CNTs when aligned parallelly can give density 10 times greater than that of current lithium-ion batteries, when stretched elastically. It also gives an additional benefit of long cycling durability, temperature insensitivity, no spontaneous dischange, and arbitrary discharge rate.

 

Salient features of CNTs:

·         Strength

·         Hardness

·         Kinetic properties

·         Electrical properties

·         High surface areas

 

·         Optical properties

·         Wave absorption

·         Thermal properties

·         Defects

·         One-dimensional transport Toxicity

Contact Us for CNT’s and its Applications

You can easily purchase excellent quality nano materials at great prices. To Place an order download our order form and send to us. All materials are dispatched though registered couriers and post . You can also request for a quote by mailing us at info@reinste.com

Contact: +91 120 4781212,4781217, 4781230 or 91 9810662669. We invite you to contact us for further information about our company and our capabilities. At Reinste Nano Ventures, we could be glad to be of service to you. We look forward to your suggestions and feedback.

Leave a comment

Your email address will not be published.


*