Cover Image

PREPARATION OF COFE2O4, TIO2 AND ZNO NANOPARTICLES AND THEIR SURFACE MODIFICATION FOR STABLE NANOFLUIDS APPLICATION

Nanofluids can enhance the properties of the conventional base fluids due to their high surface area over volume ratio that makes them useful in many applications such as heat transfer, drug delivery and oil recovery. However, nanoparticles tend to agglomerate in base fluids due to the strong Van de...

Full description

Saved in:
Bibliographic Details
Main Author: ROSLAN, ANIS ARISA
Format: Thesis
Language:English
Published: 2021
Subjects:
Q Science (General)
Online Access:http://utpedia.utp.edu.my/22650/1/AnisArisaRoslan_18003534.pdf
http://utpedia.utp.edu.my/22650/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-utp-utpedia.22650
record_format eprints
spelling my-utp-utpedia.226502022-02-22T07:12:35Z http://utpedia.utp.edu.my/22650/ PREPARATION OF COFE2O4, TIO2 AND ZNO NANOPARTICLES AND THEIR SURFACE MODIFICATION FOR STABLE NANOFLUIDS APPLICATION ROSLAN, ANIS ARISA Q Science (General) Nanofluids can enhance the properties of the conventional base fluids due to their high surface area over volume ratio that makes them useful in many applications such as heat transfer, drug delivery and oil recovery. However, nanoparticles tend to agglomerate in base fluids due to the strong Van der Waals interactions, hindering the nanofluids from performing at their optimum level. The main objective of this work is to produce a homogeneous nanoparticles suspension in the base fluid by surface modification of nanoparticles. Three types of nanoparticles; cobalt ferrite (CoFe2O4), titanium dioxide (TiO2) and zinc oxide (ZnO) were synthesized via the hydrothermal method. The optimum temperature and duration for the hydrothermal growth of nanoparticles were determined by analyzing the effect of the synthesis parameter on the size and morphology of nanoparticles. The optimum temperature and duration for the hydrothermal growth of CoFe2O4, TiO2 and ZnO nanoparticles were found to be at 200°C for 5 hours, 120°C for 12 hours and 100°C for 2 hours, respectively. The synthesized nanoparticles were then used in the preparation of nanofluid. The stability of the nanofluids prepared via one-step and two-steps procedures were evaluated via physical observation of the formation of sedimentation over time. Polyethene glycol (PEG), poly (vinyl alcohol), polyvinylpyrrolidone and amino silane were used to study the effect of surface modification on the stability of the nanoparticles. The samples were characterized by using XRD, FESEM, TEM, FTIR, VSM and zeta potential to evaluate the crystalline phase and grain sizes, morphology, presence of functional groups, magnetic properties, and the stability of nanofluids. It is found that CoFe2O4-PVP based nanofluid exhibited the highest stability over 14 days with a zeta potential value of 62.2 mV, an increment of 59.1% compared to pure CoFe2O4 nanofluid. These findings provide a further understanding of the nanoparticles and nanofluids synthesis methods with surface modification alternative in contemplation of nanofluid stability enhancement. 2021-12 Thesis NonPeerReviewed application/pdf en http://utpedia.utp.edu.my/22650/1/AnisArisaRoslan_18003534.pdf ROSLAN, ANIS ARISA (2021) PREPARATION OF COFE2O4, TIO2 AND ZNO NANOPARTICLES AND THEIR SURFACE MODIFICATION FOR STABLE NANOFLUIDS APPLICATION. Masters thesis, Universiti Teknologi PETRONAS.
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Electronic and Digitized Intellectual Asset
url_provider http://utpedia.utp.edu.my/
language English
topic Q Science (General)
spellingShingle Q Science (General)
ROSLAN, ANIS ARISA
PREPARATION OF COFE2O4, TIO2 AND ZNO NANOPARTICLES AND THEIR SURFACE MODIFICATION FOR STABLE NANOFLUIDS APPLICATION
description Nanofluids can enhance the properties of the conventional base fluids due to their high surface area over volume ratio that makes them useful in many applications such as heat transfer, drug delivery and oil recovery. However, nanoparticles tend to agglomerate in base fluids due to the strong Van der Waals interactions, hindering the nanofluids from performing at their optimum level. The main objective of this work is to produce a homogeneous nanoparticles suspension in the base fluid by surface modification of nanoparticles. Three types of nanoparticles; cobalt ferrite (CoFe2O4), titanium dioxide (TiO2) and zinc oxide (ZnO) were synthesized via the hydrothermal method. The optimum temperature and duration for the hydrothermal growth of nanoparticles were determined by analyzing the effect of the synthesis parameter on the size and morphology of nanoparticles. The optimum temperature and duration for the hydrothermal growth of CoFe2O4, TiO2 and ZnO nanoparticles were found to be at 200°C for 5 hours, 120°C for 12 hours and 100°C for 2 hours, respectively. The synthesized nanoparticles were then used in the preparation of nanofluid. The stability of the nanofluids prepared via one-step and two-steps procedures were evaluated via physical observation of the formation of sedimentation over time. Polyethene glycol (PEG), poly (vinyl alcohol), polyvinylpyrrolidone and amino silane were used to study the effect of surface modification on the stability of the nanoparticles. The samples were characterized by using XRD, FESEM, TEM, FTIR, VSM and zeta potential to evaluate the crystalline phase and grain sizes, morphology, presence of functional groups, magnetic properties, and the stability of nanofluids. It is found that CoFe2O4-PVP based nanofluid exhibited the highest stability over 14 days with a zeta potential value of 62.2 mV, an increment of 59.1% compared to pure CoFe2O4 nanofluid. These findings provide a further understanding of the nanoparticles and nanofluids synthesis methods with surface modification alternative in contemplation of nanofluid stability enhancement.
format Thesis
author ROSLAN, ANIS ARISA
author_facet ROSLAN, ANIS ARISA
author_sort ROSLAN, ANIS ARISA
title PREPARATION OF COFE2O4, TIO2 AND ZNO NANOPARTICLES AND THEIR SURFACE MODIFICATION FOR STABLE NANOFLUIDS APPLICATION
title_short PREPARATION OF COFE2O4, TIO2 AND ZNO NANOPARTICLES AND THEIR SURFACE MODIFICATION FOR STABLE NANOFLUIDS APPLICATION
title_full PREPARATION OF COFE2O4, TIO2 AND ZNO NANOPARTICLES AND THEIR SURFACE MODIFICATION FOR STABLE NANOFLUIDS APPLICATION
title_fullStr PREPARATION OF COFE2O4, TIO2 AND ZNO NANOPARTICLES AND THEIR SURFACE MODIFICATION FOR STABLE NANOFLUIDS APPLICATION
title_full_unstemmed PREPARATION OF COFE2O4, TIO2 AND ZNO NANOPARTICLES AND THEIR SURFACE MODIFICATION FOR STABLE NANOFLUIDS APPLICATION
title_sort preparation of cofe2o4, tio2 and zno nanoparticles and their surface modification for stable nanofluids application
publishDate 2021
url http://utpedia.utp.edu.my/22650/1/AnisArisaRoslan_18003534.pdf
http://utpedia.utp.edu.my/22650/
_version_ 1739832972263030784
score 13.211869

Similar Items