Improving stability of water based nanocarbon using OH-CNT modifield with polyvinyl pyrrolidone as a dispersing agent

Mohd Ameer Aiman , Ruhaizi (2013) Improving stability of water based nanocarbon using OH-CNT modifield with polyvinyl pyrrolidone as a dispersing agent. Project Report. UTeM, Melaka. (Submitted)

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Abstract

Nanotechnology is a new kind of field that mostly dealing with a nanosized materials, device or any other structure with dimensions ranging from 1 nm to 100 nm. With a variety of possible application, nanotechnology can be said as a key to the future technology. Many technological advance country like Japan, European country and United States had invest billions of dollar in nanotechnology research. Another branch of application of nanotechnology is nanofluids. Nanofluids is a suspensions that contains nanoparticle inside a based fluids. Nanofluids has become the need in industry or any thermal management application because of its potential and its wonder properties of high thermal conductivity and high heat transfer rate that cannot be obtain from other materials. For this particular project, the nanoparticle that being used is carbon nanotube (CNT). Because of its cylindrical shape, it will have the greatest surface area per volume compare to other. So with this geometry, it also help it to has the highest value for thermal conductivity and heat transfer capacity compare to other nanoparticle. For the based fluids, water has been chosen. The main intentions of this water based carbon nanotube is to be used for the application in automotive or in a central chilled air conditioning system. The real challenge in producing the water based carbon nanotube is to disperse the carbon nanotube in water because of the hydrophobic characteristic of the carbon nanotube itself. To overcome this problem, a dispersing agent is needed which is polyvinylpyrrolidone (PVP) to reduce the surface tension of the water to ensure that CNT can interact well with water molecules. A different weight percentage of CNT and PVP was used to find a suitable ratio between the two parameter. Final result shows some enhancement of thermal conductivity less than 10% compare to water.

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