Rahat, Arifutzzaman and Ismail, Ahmad Faris and Khan, Ahsan Ali and Alam, Md Zahangir and Rahman, Saidur (2020) Effect of particle loading on the stability of the water based iron-oxide nanofluids. International Journal of Advanced Science and Technology, 29 (1). pp. 1326-1333. ISSN 2005-4238 E-ISSN 2207-6360
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Abstract
Dispersion stability is a crucial challenge for a nanofluid to obtained a uniform dispersion. The main aim of this research is to develop stability monitoring approach by experimental investigation of ultra violet-visible (UV-vis) absorbance of deionized water (DW) based ironoxide (maghemite: MH) nanoparticles dispersed nanofluids (MH/DW). Five different samples were prepared with increasing the loading of MH nanoparticles varied from 0.065 to 0.157 mg/ml in DW. Primarily digital photographs were captured to observed the sedimentation of MH/DW the nanofluids. A method was developed to monitor the quantitative stability of relative concentrations of MH/DW nanofluids. Optical absorbance measurements were conducted using UV-vis absorbance spectroscopy by varying the light wavelength from 200 to 800 nm. Photographs of MH/DW nanofluids after preparation of ~ 25 days shown uniform and there was no precipitation was visible in the suspensions. For a certain loading of MH particle, with the increasing wavelength absorbance was found to be increased. Absorbance peaks were created at wavelength of ~ 360 nm and then decreased monotonically with the increasing wavelength. The relative concentration of the MH/DW nanofluids was declined when increase the precipitation concentration with time due to slight agglomeration. After ~ 600 hours, the minimum and maximum precipitation rates were found ~ 0.27 and ~ 2.5 % for MH/DW nanofluid with the MH concentration of 0.065 and 0.157 mg/ml respectively. Amount of MH nanoparticle loading affects the rate of sedimentations of the produced MH/DW nanofluids.
| Item Type: | Article (Journal) |
|---|---|
| Additional Information: | 1743/83764 |
| Uncontrolled Keywords: | Stability, iron oxide, absorbance, relative concentration and nanofluid |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TP Chemical technology > TP200 Manufacture and use of chemicals |
| Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): | Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechanical Engineering |
| Depositing User: | Dr. Md. Zahangir Alam |
| Date Deposited: | 28 Oct 2020 11:35 |
| Last Modified: | 16 Jan 2021 11:51 |
| URI: | http://irep.iium.edu.my/id/eprint/83764 |
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