Design And Synthesis Of Magnetic Nanoparticles Augmented Microcapsule For Dye Removal
| dc.contributor.author | Kong, Li Peng | |
| dc.date.accessioned | 2019-10-25T07:30:54Z | |
| dc.date.available | 2019-10-25T07:30:54Z | |
| dc.date.issued | 2013-11 | |
| dc.description.abstract | Iron oxide magnetic nanoparticles (iron oxide MNPs) with catalytic and magnetic properties exhibit superior dual-functionalities for water remediation. However, the nanotoxicity of this nanomaterial prohibited its use for large scale engineering application. Here a synthesis route is developed to encapsulate MNPs into polyvinylidene fluoride (PVDF) microcapsule via phase inversion technique. Integration of MNPs into polymeric matrix would significantly decrease its physical contact with surrounding environment, hence, mitigate its nanotoxicity. In addition, the high surface to volume ratio of nanomaterials can still be retained by having MNPs residing insides a porous polymeric structure. The particles-polymer composite formed can be employed to remove targeted pollutant from water resources through two mechanisms: (1) adsorption and (2) catalytic degradation. Organic dyes, such as methylene blue (MB) have been selected as model system due to their ease of detection by colorimetric method. Dyes removal by microcapsules is strongly dependent on the electrostatic interaction between targeted dye and the microcapsule. Cationic dyes (MB, and thioflavin T, TFT) can be removed more than 95% in batch system over time (24 hours) but anionic methyl orange (MO) remained ~98% in water even after loading time was extended to ~35 hours. In the study of colloidal stability, the efficiency of MNPs-PVDF microcapsules after MNPs (nanorods) surface functionalized with Poly(diallyldimethylammonium chloride) (PDDA) (MNPs-PDDA-PVDF microcapsules) outperformed the original MNPs-PVDF microcapsules before surface functionalization by increased of ~22% of MB uptake. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/9078 | |
| dc.language.iso | en | en_US |
| dc.publisher | Universiti Sains Malaysia | en_US |
| dc.subject | Magnetic Nanoparticles | en_US |
| dc.subject | Dye Removal | en_US |
| dc.title | Design And Synthesis Of Magnetic Nanoparticles Augmented Microcapsule For Dye Removal | en_US |
| dc.type | Thesis | en_US |