Improved Dispersion and Interfacial Interaction of Polyaniline-coated Nanocarbons In Polymeric Composites

Title
Improved Dispersion and Interfacial Interaction of Polyaniline-coated Nanocarbons In Polymeric Composites
Authors
알리
Keywords
improveddispersionandinterfacialinteractionofpolyanilinecoatednanocarbonsinpolymericcomposites
Issue Date
2011
Publisher
인하대학교
Abstract
Nanocarbon materials, such as carbon nanotube and graphene nanosheets have been widely studied because of their excellent properties and potential applications such as nanoelectronics, sensors, batteries, supercapacitors, hydrogen storage, and nanocomposites. In recent years, the incorporation of these nanocarbon materials into conductive polymers has attracted great attention due to their ability to improve mechanical, thermal and electrical conductivity of the polymers matrix. Among these polymers, polyaniline (PANI) has been considered as one of the most promising electrode materials because of its low cost, easy synthesis and relatively high conductivity. To enhance these proprieties, the high dispersion of PANI on a support material and good interfacial interaction should be a promising way to improve the capacitive properties of PANI. In this study, the alkylated reduced graphene oxide with polyaniline nanofibers (a-rGO/PANI) composite were prepared using solution mixing process. PANI nanofibers were prepared by using rapid mixing polymerization. These PANI nanofibers exhibit excellent water dispersibility due to their uniform nanofiber morphology. The alkylated composite showed excellent dispersion stability compared to the composite without alkylation in DMF, due to the alkyl groups on the surface of reduced graphene oxide. The electrical conductivity investigations revealed that the alkylated composite showed higher than that composite without alkylation. These results suggest that the alkylation of reduced graphene oxide plays an important role in the interfacial interaction and uniform dispersion into polyaniline matrix. The incorporation of carbon nanotubes and silver nanoparticles into polyaniline hybrid composites prepared through the emulsion polymerization was also studied. The morphology, thermal stability and electrical conductivities of the composites were investigated. These results suggest that the incorporation of silver nanoparticles in
Description
ABSTRACT 1 국문요약 3 CONTENTS CONTENTS FOR PART I 5 CONTENTS FOR PART II 7 CONTENTS FOR PART III 8 LIST OF FIGURES AND TABLES LIST OF FIGURES FOR PART I 9 LIST OF FIGURES FOR PART II 11 LIST OF FIGURES FOR PART III 13 PART I. Alkylated Graphene Nanosheet Composites with Polyaniline Nanofibers CONTENTS 15 1. INTRODUCTION 15 2. EXPERIMENTAL DETAILS 18 2.1. Materials 18 2.2. Preparation of Graphene Oxide (GO) 19 2.3. Alkylation of Graphene Oxide (a-GO) 20 2.4. Reduction of a-GO with hydrazine hydrate (a-GR) 20 2.5. Synthesis of polyaniline nanofiber (PANI) 21 2.6. Synthesis of alkylated Graphene /polyaniline nanofiber composites (a-GR/PANI) 21 2.7. Characterization 22 3. RESULTS AND DISCUSSION 24 3.1. Morphology of PANI nanofiber and a-GR/PANI composites 24 3.2. Structural characterization 27 3.3. Thermal stability of PANI nanofiber and a-GR/PANI composites 31 3.4. Crystalline structure of PANI nanofiber and a-GR/PANI composites 33 3.5. Dispersion stability of PANI nanofiber and a-GR/PANI composites 34 3.6. Electrical conductivity of PANI nanofiber and a-GR/PANI composite 36 4. CONCLUSION 38 5. REFERENCES 39 PART II. Polyanilines and Silver Nanoparticles-Incorporated Multiwalled Carbon Nanotube Composites Prepared via Emulsion Polymerization CONTENTS 42 1. INTRODUCTION 42 2. EXPERIMENTAL DETAILS 44 2.1. Materials 44 2.2. Acid Treatment of MWCNT (a- MWCNT) 45 2.3. Synthesis of a-MWCNT/PANI-Ag composites 45 2.4. Characterization 46 3. RESULTS AND DISCUSSION 48 3.1. Morphology of PANI and a-MWCNT/PANI-Ag composites 48 3.2. Structural characterization 51 3.3. Thermal stability of PANI and a-MWCNT/PANI-Ag composites 56 3.4. Crystalline structure of PANI and a-MWCNT/PANI-Ag composites 58 3.5. Electrical conductivity of the a-MWCNT/PANI-Ag composites 59 4. CONCLUSION 61 5. REFERENCES 62 PART III. The effects of aniline as a stabilizer for Pt nanoparticles doped onto the surface of reduced graphene oxide CONTENTS 65
URI
http://dspace.inha.ac.kr/handle/10505/22034
Appears in Collections:
College of Engineering(공과대학) > Polymer Science and Engineering (고분자공학) > Theses(고분자공학 석박사 학위논문)
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