Stability investigation of water based exfoliated graphene nanofluids

Until now stability is a crucial technical challenge to prepare a homogeneous dispersion. The main purpose of this work is to experimentally investigate the suspension stability of the exfoliated Graphene (Gr) suspension in deionized water (DW) (Gr/DW). Five different samples were prepared by var...

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Main Authors:	Arifutzzaman, A., Ismail, Ahmad Faris, Yaacob, Iskandar Idris, Alam, Md Zahangir, Khan, Ahsan Ali
Format:	Conference or Workshop Item
Language:	English English
Published:	IOP Publishing Ltd 2019
Subjects:	T Technology (General)
Online Access:	http://irep.iium.edu.my/72442/ http://irep.iium.edu.my/72442/ http://irep.iium.edu.my/72442/ http://irep.iium.edu.my/72442/1/72442%20Stability%20investigation%20of%20water%20based.pdf http://irep.iium.edu.my/72442/2/72442%20Stability%20investigation%20of%20water%20based%20SCOPUS.pdf

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recordtype	eprints
spelling	iium-724422019-05-31T03:06:48Z http://irep.iium.edu.my/72442/ Stability investigation of water based exfoliated graphene nanofluids Arifutzzaman, A. Ismail, Ahmad Faris Yaacob, Iskandar Idris Alam, Md Zahangir Khan, Ahsan Ali T Technology (General) Until now stability is a crucial technical challenge to prepare a homogeneous dispersion. The main purpose of this work is to experimentally investigate the suspension stability of the exfoliated Graphene (Gr) suspension in deionized water (DW) (Gr/DW). Five different samples were prepared by varying the exfoliated Gr volume fraction from 0.11 to 0.30 % in deionized water. For the observation of sedimentation photo capturing was used as a primary technique. Finally stability of the exfoliated Gr/DW nanofluids were monitored quantitatively with the aid of optical absorbance measurements using ultra violet-visible absorbance spectroscopy. The wavelength range of light was varied from 200 to 800 nm. Digital photographs of Gr/DW nanofluid samples after preparation of about 25 days shown homogeneous and visibly there was no sedimentation in the suspensions. The peak absorbance of Gr/DW nanofluids was appeared at the wavelength of 280 nm. For a certain volume fraction, absorbance was decreased monotonically with the increasing wavelength. The relative concentration of the Gr/DW samples was decreased due to slight agglomeration by the increasing concentration of precipitation with time. After 600 hours (~25 days), the lowest and maximum precipitation rate were appeared ~ 6 and ~ 10 % for the Gr/DW samples with the volume fraction of 0.11 and 0.30 % respectively. Different amount of exfoliated Gr loading affect the rate of sedimentations of exfoliated Gr/DW nanofluids. IOP Publishing Ltd 2019-03-20 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/72442/1/72442%20Stability%20investigation%20of%20water%20based.pdf application/pdf en http://irep.iium.edu.my/72442/2/72442%20Stability%20investigation%20of%20water%20based%20SCOPUS.pdf Arifutzzaman, A. and Ismail, Ahmad Faris and Yaacob, Iskandar Idris and Alam, Md Zahangir and Khan, Ahsan Ali (2019) Stability investigation of water based exfoliated graphene nanofluids. In: 4th International Conference on Mechanical, Automotive and Aerospace Engineering (ICMAAE 2018), 19th-20th September 2018, Kuala Lumpur, Malaysia. https://iopscience.iop.org/article/10.1088/1757-899X/488/1/012002/pdf 10.1088/1757-899X/488/1/012002
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	T Technology (General)
spellingShingle	T Technology (General) Arifutzzaman, A. Ismail, Ahmad Faris Yaacob, Iskandar Idris Alam, Md Zahangir Khan, Ahsan Ali Stability investigation of water based exfoliated graphene nanofluids
description	Until now stability is a crucial technical challenge to prepare a homogeneous dispersion. The main purpose of this work is to experimentally investigate the suspension stability of the exfoliated Graphene (Gr) suspension in deionized water (DW) (Gr/DW). Five different samples were prepared by varying the exfoliated Gr volume fraction from 0.11 to 0.30 % in deionized water. For the observation of sedimentation photo capturing was used as a primary technique. Finally stability of the exfoliated Gr/DW nanofluids were monitored quantitatively with the aid of optical absorbance measurements using ultra violet-visible absorbance spectroscopy. The wavelength range of light was varied from 200 to 800 nm. Digital photographs of Gr/DW nanofluid samples after preparation of about 25 days shown homogeneous and visibly there was no sedimentation in the suspensions. The peak absorbance of Gr/DW nanofluids was appeared at the wavelength of 280 nm. For a certain volume fraction, absorbance was decreased monotonically with the increasing wavelength. The relative concentration of the Gr/DW samples was decreased due to slight agglomeration by the increasing concentration of precipitation with time. After 600 hours (~25 days), the lowest and maximum precipitation rate were appeared ~ 6 and ~ 10 % for the Gr/DW samples with the volume fraction of 0.11 and 0.30 % respectively. Different amount of exfoliated Gr loading affect the rate of sedimentations of exfoliated Gr/DW nanofluids.
format	Conference or Workshop Item
author	Arifutzzaman, A. Ismail, Ahmad Faris Yaacob, Iskandar Idris Alam, Md Zahangir Khan, Ahsan Ali
author_facet	Arifutzzaman, A. Ismail, Ahmad Faris Yaacob, Iskandar Idris Alam, Md Zahangir Khan, Ahsan Ali
author_sort	Arifutzzaman, A.
title	Stability investigation of water based exfoliated graphene nanofluids
title_short	Stability investigation of water based exfoliated graphene nanofluids
title_full	Stability investigation of water based exfoliated graphene nanofluids
title_fullStr	Stability investigation of water based exfoliated graphene nanofluids
title_full_unstemmed	Stability investigation of water based exfoliated graphene nanofluids
title_sort	stability investigation of water based exfoliated graphene nanofluids
publisher	IOP Publishing Ltd
publishDate	2019
url	http://irep.iium.edu.my/72442/ http://irep.iium.edu.my/72442/ http://irep.iium.edu.my/72442/ http://irep.iium.edu.my/72442/1/72442%20Stability%20investigation%20of%20water%20based.pdf http://irep.iium.edu.my/72442/2/72442%20Stability%20investigation%20of%20water%20based%20SCOPUS.pdf
first_indexed	2023-09-18T21:42:39Z
last_indexed	2023-09-18T21:42:39Z
_version_	1777413242773045248

Stability investigation of water based exfoliated graphene nanofluids

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