Synthesis of Polymer Nanocomposites via Activators ReGenerated by Electron Transfer Atom Transfer Radical Polymerization and Click Chemistry
- Alternative Title
- ARGET ATRP와 클릭화학을 이용한 고분자 나노컴포지트의 합성
- Abstract
- Surface-initiated Atom Transfer Radical Polymerization (SI-ATRP)는 기능성 고분자인 나노 복합 재료 합성방법으로 관심 받고 있다. 그러나 기존 SI-ATRP는 금속 촉매의 양이 많이 필요하다는 것과 중합 vessels의 산소 감도 등 두 가지 큰 단점을 가지고 있다. 이 논문에서, Activators ReGenerated by Electron Transfer Atom Transfer Radical Polymerization (ARGET ATRP)를 기초로 한 실리카 폴리(methyl methacrylate) (SiO2-PMMA) 나노 복합 재료의 간단하고 친환경적인 합성방법을 보고한다. 실리카표면에 부착된 공유결합 고분자 형성은 촉매의 수준인 part per million(ppm) 을 사용하여 표면 개시된 ARGET ATRP를 통해 얻었다. 또한, ARGET ATRP 조합으로 열반응인 SiO2-PNIPAm 나노 복합 재료의 합성에 손쉬운 경로와 click chemistry 대해서 논의 되었다. 이것은 SiO2 나노 입자의 표면이 수많은 수정된 열 반응으로 맞춰진 것으로 나타났다. ARGET ATRP는 "Grafting from"과 “Grafting to"의 접근으로써 기능성 나노 복합 재료의 합성을 위한 새로운 효과적인 방법을 제공 할 것으로 예상된다.
Surface-initiated Atom Transfer Radical Polymerization (SI-ATRP) is an attractive method for synthesis of functional polymeric nanocomposites. However, the conventional SI-ATRP suffers two notorious drawbacks including large amount of metal catalyst and oxygen sensitivity of polymerization vessels. In this dissertation, a simple and greener synthesis of silica poly(methylmethacrylate) (SiO2-PMMA) nanocomposites based on Activators ReGenerated by Electron Transfer Atom Transfer Radical Polymerization (ARGET ATRP) was reported. The formation of polymer chains covalently attached to silica surface was achieved via surface-initiated ARGET ATRP with using part per million (ppm) level of catalyst. In addition, a facile route for synthesis of thermo-responsive SiO2-PNIPAm nanocomposites by combination of fascinating ARGET ATRP and click chemistry was also discussed. It was found that the surface of SiO2 nanoparticles was tailored to be thermo-responsive upon the modification. ARGET ATRP is expected to provide a new and efficient method for synthesis of functional nanocomposites by both of “Grafting from” and “Grafting to” approaches.
- Issued Date
- 2013
- Awarded Date
- 2013. 8
- Type
- Dissertation
- Publisher
- 부경대학교
- Affiliation
- 대학원
- Department
- 대학원 이미지시스템공학과
- Advisor
- 임권택
- Table Of Contents
- Abstract i
Abstract (Korean) ii
Table of contents iii
List of figures and tables v
Chapter 1 1
General introduction 1
1.1. Introduction to polymeric nanocomposites 1
1.2. Atom Transfer Radical Polymerization 2
1.3. Activators ReGenerated by Electron Transfer (ARGET) Atom Transfer Radical Polymerization 4
1.4. Click chemistry 5
1.5. Silica-polymer nanocomposites 8
1.6. Aim of this thesis 10
1.7. Reference 11
Chapter 2 16
Facile synthesis of SiO2-poly(methyl methacrylate) nanocomposites via surface-initiated ARGET ATRP 16
2.2. Experimental section 19
2.2.1. Materials 19
2.2.2. Synthesis of initiator-functionalized SiO2 particles 19
2.2.3. Surface-initiated polymerization of SiO2 macro-initiator 19
2.2.4. Characterization 20
2.3. Result and discussion 20
2.4. Conclusion 27
2.5. References 27
Chapter 3 31
A facile route for the covalent functionalization of SiO2 nanoparticles with thermoresponsive PNIPAm employing thiol-ene chemistry and ARGET ATRP technique 31
3.1. Introduction 32
3.2. Experimental 33
3.2.1. Materials 33
3.2.2. Synthesis of thiol-functionalized SiO2 nanoparticles 34
3.2.3. Synthesis of 10-Undecenyl 2-bromoisobutyrate (UniB-Br) 34
3.2.4. Synthesis of vinyl-terminated polymer by ARGET ATRP 34
3.2.5. Surface modification of SiO2 nanoparticles by PNIPAm using “click” chemistry 35
3.2.6. Characterization 35
3.3. Result and discussion 36
3.4. Conclusion 43
3.5. References 43
Acknowledgements 46
- Degree
- Master
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