Comparative study on stability of nanofluid using two different dispering agents

Mohd Khairul Mazni , Mohamad (2013) Comparative study on stability of nanofluid using two different dispering agents. Project Report. UTeM, Melaka. (Submitted)

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Abstract

Nanofluid have a big potential in term of heat transfer and become a need in industries and also for scientist around world . Apart from that nanofluid also can be used in variety of application such as cooling agent in automotive sector, heat transfer in electronic application and also used in cooling industries. Carbon Nanotube (CNT) is hard to disperse in base water and need a help from dispersing agent. So an experiment need to be run in order to produce the stable nanofluid based on uses of carbon nanotube and dispersing agents. The type of carbon nanotube used for this experiment is manufactured by Materials and Electrochemical Research Corporation (MER). This carbon nanotube is Multi-wall Carbon Nanotube (MWNT) and have large surface area and able to help during heat removing process. Regarding to this matter, two dispersing agent was introduced in order to help the CNT to disperse well in base water. Those two dispersing agent used in this experiment were Sodium Dodecyl Sulphate (SDS) and Polyvinylpyrrolidone (PVP). This surfactants help to reduce the water surface tension and increase the stability of nanofluid. The experiment started by weight percentage and ratio between the CNT and dispersing agent. Then the formation was homogenized, has been ultrasonic and checked the pH value. The stability result of nanofluids was determine after 100 hours kept in room temperature and being tested by using the stability test rig. The formation between MER and PVP give the best result in term of stability and also thermal conductivity. PVP is very good surfactant that help to increase the stability and thermal conductivity due to the efficient characteristic which are very soluble in water and produce less foam and bubble.

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