Iron oxide nanoparticles decorated oleic acid for high colloidal stability
In the present study, oleic acid (OA)-decorated magnetite nanoparticles (MNPs) were synthesized via in situ co-precipitation method using ammonium hydroxide as a precipitating agent. This study aims to determine the optimum loading amount of OA for improving the MNPs colloidal stability. Based on ou...
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| Format: | Article |
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Wiley
2017
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| author | Lai, Chin Wei Low, Foo Wah Tai, Mun Foong Hamid, Sharifah Bee Abd |
| author_facet | Lai, Chin Wei Low, Foo Wah Tai, Mun Foong Hamid, Sharifah Bee Abd |
| author_sort | Lai, Chin Wei |
| collection | UM |
| description | In the present study, oleic acid (OA)-decorated magnetite nanoparticles (MNPs) were synthesized via in situ co-precipitation method using ammonium hydroxide as a precipitating agent. This study aims to determine the optimum loading amount of OA for improving the MNPs colloidal stability. Based on our results obtained, it was found that the zeta potential values of MNPs increased from −29.8 to −58.1 mV after modification of MNPs with 1.2 wt.% of OA. Indeed, results obtained clearly to show that a maximum colloidal stability of MNPs in a basic medium could be significantly improved. As a result, this resultant colloidal suspension performance was approximately 7 times higher (21 days- high colloidal stability against precipitation and agglomeration) than that of the undecorated MNPs sample (3 days). Based on vibrating sample magnetometer (VSM) analysis, the resultant OA-decorated MNPs exhibited superparamagnetic behavior with slightly lower saturation magnetization (51–69 emu/g) than that of undecorated MNPs sample (80 emu/g) at room temperature. This behavior was attributed to the sufficient carboxylate ions from the outer layer of the bilayer of OA-decorated MNPs, which promoted the high colloidal stability performance. |
| first_indexed | 2024-03-06T05:54:28Z |
| format | Article |
| id | um.eprints-21562 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:54:28Z |
| publishDate | 2017 |
| publisher | Wiley |
| record_format | dspace |
| spelling | um.eprints-215622019-06-27T03:46:29Z http://eprints.um.edu.my/21562/ Iron oxide nanoparticles decorated oleic acid for high colloidal stability Lai, Chin Wei Low, Foo Wah Tai, Mun Foong Hamid, Sharifah Bee Abd Q Science (General) QD Chemistry In the present study, oleic acid (OA)-decorated magnetite nanoparticles (MNPs) were synthesized via in situ co-precipitation method using ammonium hydroxide as a precipitating agent. This study aims to determine the optimum loading amount of OA for improving the MNPs colloidal stability. Based on our results obtained, it was found that the zeta potential values of MNPs increased from −29.8 to −58.1 mV after modification of MNPs with 1.2 wt.% of OA. Indeed, results obtained clearly to show that a maximum colloidal stability of MNPs in a basic medium could be significantly improved. As a result, this resultant colloidal suspension performance was approximately 7 times higher (21 days- high colloidal stability against precipitation and agglomeration) than that of the undecorated MNPs sample (3 days). Based on vibrating sample magnetometer (VSM) analysis, the resultant OA-decorated MNPs exhibited superparamagnetic behavior with slightly lower saturation magnetization (51–69 emu/g) than that of undecorated MNPs sample (80 emu/g) at room temperature. This behavior was attributed to the sufficient carboxylate ions from the outer layer of the bilayer of OA-decorated MNPs, which promoted the high colloidal stability performance. Wiley 2017 Article PeerReviewed Lai, Chin Wei and Low, Foo Wah and Tai, Mun Foong and Hamid, Sharifah Bee Abd (2017) Iron oxide nanoparticles decorated oleic acid for high colloidal stability. Advances in Polymer Technology, 37 (6). pp. 1712-1721. ISSN 0730-6679, DOI https://doi.org/10.1002/adv.21829 <https://doi.org/10.1002/adv.21829>. https://doi.org/10.1002/adv.21829 doi:10.1002/adv.21829 |
| spellingShingle | Q Science (General) QD Chemistry Lai, Chin Wei Low, Foo Wah Tai, Mun Foong Hamid, Sharifah Bee Abd Iron oxide nanoparticles decorated oleic acid for high colloidal stability |
| title | Iron oxide nanoparticles decorated oleic acid for high colloidal stability |
| title_full | Iron oxide nanoparticles decorated oleic acid for high colloidal stability |
| title_fullStr | Iron oxide nanoparticles decorated oleic acid for high colloidal stability |
| title_full_unstemmed | Iron oxide nanoparticles decorated oleic acid for high colloidal stability |
| title_short | Iron oxide nanoparticles decorated oleic acid for high colloidal stability |
| title_sort | iron oxide nanoparticles decorated oleic acid for high colloidal stability |
| topic | Q Science (General) QD Chemistry |
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