What is Multi Walled Carbon Nanotubes? – Properties, Applications, and More

When it comes to carbon nanotubes, there are many different variations. Multi-walled carbon nanotubes (MWCNTs) are unique in that they have multiple layers of concentric tubes. They are unlike single-walled carbon nanotubes or double-walled carbon nanotubes. Let’s take a deeper look at MWCNTs, their properties, and how they can be used in the future.

What is a Multi Walled Carbon Nanotube?

MWCNTs are simply carbon nanotubes with multiple concentric wall layers. They are characterized by their hollow cylindrical shape, with a diameter between 10-100 nanometers. They are typically metallic and have a very high tensile strength. They are usually made of graphite. MWCNTs are produced by growing graphite to form carbon nanotubes. Then, the nanotubes are heated in an argon-hydrogen atmosphere to produce carbon nanotubes with multiple layers.

Properties of MWCNTs

MWCNTs are made of carbon, a very stable material, and last a long time. They are also very flexible to use in flexible electronics. In addition, they are very lightweight and can conduct heat and electricity. Because of these properties, they could be used in various applications. Some of them include gas sensors, water filtration systems, energy storage devices, etc. They are very lightweight, so they could help make new types of lightweight materials. They could also be used as conductive elements in thermal energy storage systems. Because of their specific structure, they are also very good at blocking harmful substances. They could be used to filter water or air. They could also be used in gas sensors and other applications that need to stop certain substances from getting through.

Applications of MWCNTs

Due to their high tensile strength, MWCNTs are useful in building new materials. They could be used to make lightweight yet strong materials for various applications. For example, they could be used in making new types of aircraft. they are also helpful in storing energy. They used to create new kinds of batteries and supercapacitors. These could store large amounts of energy and release it quickly, valid for cars and other vehicles. In addition, they could be used to make filters. They have tiny pores that make them good at filtering water, air, and other substances.

Safety Concerns with MWCNTs

Like all carbon nanotubes, MWCNTs have been studied for their potential to cause health issues. Studies have shown that they could be toxic, but only after being damaged by very high temperatures. They have been shown to cause inflammation and other harmful effects when ingested. They have also been shown to cause genetic mutations. Studies have shown, however, that these effects are meager. They are also very difficult to break down and are not expected to biodegrade. They have not been approved for use in products due to these safety concerns. However, they could be used in specific applications if carefully contained.

Conclusion

Multi-walled carbon nanotubes are cylindrical carbon nanotubes with multiple layers of concentric cylinders. They are produced by growing graphite to form carbon nanotubes, then heating them in an argon-hydrogen atmosphere. MWCNTs help build new materials, store energy, and filter substances. However, they were handled with care due to their potential toxicity.
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