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Fabrication of Polyaniline-coated Magnetite/Silica Nanoparticles for Electro-magnetorheological Fluid Application : 폴리아닐린이 코팅된 산화철/실리카 나노입자의 제조와 전기-자기 반응성 지능형 유체로의 응용
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 장정식 | - |
dc.contributor.author | 홍승희 | - |
dc.date.accessioned | 2017-07-19T05:57:52Z | - |
dc.date.available | 2017-07-19T05:57:52Z | - |
dc.date.issued | 2016-08 | - |
dc.identifier.other | 000000135959 | - |
dc.identifier.uri | https://hdl.handle.net/10371/129420 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 화학생물공학부, 2016. 8. 장정식. | - |
dc.description.abstract | The polyaniline-coated magnetite/silica core/shell nanoparticles (Fe3O4/SiO2/PANI NPs) are successfully fabricated and applied as the dual-responsive smart fluid. The Fe3O4/SiO2/PANI NPs-based EMR fluid exhibits dual stimuli-responsive properties. Moreover, the fluid represents excellent ER efficiency (517.2 % at shear rate of 0.1 /s and field strength of 3 kVmm-1) and MR performance (142.3 % at shear rate of 0.1 /s and field strength of 429 kA/m) in low concentrated system, which is attributed to the uniformity of particles and size effect. Particularly, the fluid is responsive to both electric and magnetic fields simultaneously and fine control of the rheological properties are possible according to field direction. These results would provide the possibilities for rheological control of dual stimuli-responsive smart fluid and their practical application. | - |
dc.description.tableofcontents | Chapter 1. Introduction 1
1.1 Stimuli-responsive smart fluids 1 1.1.1 Electro and magneto-responsive fluids 4 1.1.2 Dual stimuli-responsive fluids 7 1.2 Magnetic core/shell nanoparticles 8 1.3 Objective of this study 10 Chapter 2. Experimental 11 2.1 Materials 11 2.2 Preparation of Fe3O4 NPs 11 2.3 Fabrication of Fe3O4/SiO2 NPs 12 2.4 Synthesis of Fe3O4/SiO2/PANI NPs 13 2.5 Instrument of analysis 13 Chapter 3. Results and discussion 16 3.1 Fabrication of Fe3O4/SiO2/PANI NPs 16 3.2 Characterization of Fe3O4/SiO2/PANI NPs 19 3.2.1 Morphology of Fe3O4/SiO2/PANI NPs 19 3.2.2 Crystalline structure of Fe3O4/SiO2/PANI NPs 23 3.2.3 Characterization of Fe3O4/SiO2/PANI NPs 26 3.2.4 Magnetic properties of Fe3O4/SiO2/PANI NPs 31 3.3 Stimuli-responsive properties 33 3.3.1 Flow curves of the fluid 33 3.3.2 Dynamic yield stress 37 3.3.3 Real-time responsive properties 39 3.3.4 Sedimentation property 42 Chapter 4.Conclusion 44 References 45 초록 49 | - |
dc.format | application/pdf | - |
dc.format.extent | 1671093 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | smart fluid | - |
dc.subject | electromagnetotheological fluids | - |
dc.subject | iron oxide | - |
dc.subject | polyaniline | - |
dc.subject | silica | - |
dc.subject | core/shell/shell nanomaterials | - |
dc.subject.ddc | 660 | - |
dc.title | Fabrication of Polyaniline-coated Magnetite/Silica Nanoparticles for Electro-magnetorheological Fluid Application | - |
dc.title.alternative | 폴리아닐린이 코팅된 산화철/실리카 나노입자의 제조와 전기-자기 반응성 지능형 유체로의 응용 | - |
dc.type | Thesis | - |
dc.contributor.AlternativeAuthor | Seunghee Hong | - |
dc.description.degree | Master | - |
dc.citation.pages | x,50 | - |
dc.contributor.affiliation | 공과대학 화학생물공학부 | - |
dc.date.awarded | 2016-08 | - |
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