Colloidal stability of CA, SDS and PVA coated Iron Oxide Nanoparticles (IONPs): Effect of molar ratio and salinity

Hussein, Siti Nurliyana Che Mohamed and Amir, Zulhelmi and Mohamad Jan, Badrul Hisham and Khalil, Munawar and Azizi, Azlinda (2022) Colloidal stability of CA, SDS and PVA coated Iron Oxide Nanoparticles (IONPs): Effect of molar ratio and salinity. Polymers, 14 (21). ISSN 2073-4360, DOI

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Iron Oxide Nanoparticles (IONPs) have received unprecedented interest in various applications. The main challenges in IONPs are fluid stability due to agglomeration in a saline condition. This paper aims to investigate the colloidal stability of citric acid (CA), sodium dodecyl sulphate (SDS) and polyvinyl alcohol (PVA) under various molar ratios and levels of salinity. Firstly, the IONPs were synthesized using a facile co-precipitation approach. Secondly, the IONPs were coated using a simple dip-coating method by varying the molar ratio of CA, SDS and PVA. Next, the coated IONPs were characterized by using an X-ray Diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), and a Field Emission Scanning Electron Microscope (FESEM) for the morphological and crystallographic study of coated IONPs. Finally, the coated IONPs were characterized for their zeta potential value and hydrodynamic size using a Zetasizer and their turbidity was measured using a turbidity meter. It was found that at a low salinity level, 0.07 M of CA-IONPs, a high zeta potential value, a smaller hydrodynamic size, and a high turbidity value of -40.9 mV, 192 nm and 159 NTU were observed, respectively. At a high salinity level, 1.0 M SDS-IONPs recorded a high zeta potential value of 23.63 mV, which corresponds to a smaller hydrodynamic size (3955 nm) and high turbidity result (639 NTU). These findings are beneficial for delivering cutting-edge knowledge, especially in enhanced oil recovery (EOR) applications.

Item Type: Article
Funders: Universiti Teknologi MARA through the Lestari 2020 internal research grant (Grant No: 600-RMC/MYRA 5/3/LESTARI (117/2020)), University of Malaya through the Fundamental Research Grant Scheme (FRGS) (Grant No: FP050-2019A)
Uncontrolled Keywords: Colloidal stability; Citric acid; Iron oxide nanoparticles; PVA; SDS
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering > Department of Chemical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Nov 2023 01:37
Last Modified: 14 Nov 2023 01:37

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