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研究生： 洪健平
Hung, Chien-Ping
論文名稱： PEO/氧化石墨烯奈米複合材料之形態與結晶行為研究
Morphology and Crystallization Behavior of Poly(ethylene oxide)/Graphene Oxide Nanocomposites
指導教授： 陳信龍
Chen, Hsin-Lung
口試委員: 廖建勛
賴韋豪
邱佑宗
學位類別： 碩士
Master
系所名稱： 工學院 - 化學工程學系
Department of Chemical Engineering
論文出版年： 2012
畢業學年度： 100
語文別： 英文
論文頁數： 73
中文關鍵詞： 石墨烯 、高分子 、結晶
外文關鍵詞： graphene, graphene oxide, poly(ethylene oxide)
相關次數： 點閱：2  下載：0 
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    • Graphene have attracted much attention owing to their outstanding mechanical, thermal, and electrical properties. Graphene oxide (GO), a derivative of graphene, has been proven to have semiconductor-like properties. In this work, we have prepared GO/PEO nanocomposites films with various GO contents and tried to establish the relationship between morphology and crystallization behavior of them. The morphology of composites was probed by x-ray scattering. It was found that PEO was intercalated between GO sheets. Besides, GO displays a certain orientation while the concentration is high (GO contents > 5 wt%). On the other hand, the crystallization behavior of PEO situating outside GO gallery was perturbed, where GO was able to act as a nucleating agent to promote the crystallization kinetics of PEO. The crystallizability and crystal growth rate were also modified upon the hybridization.

    ABSTRACT I ACKNOWLEDGEMENTS II INDEX III TABLE INDEX V FIGURE INDEX VI CHAPTER 1 INTRODUCTION 1 1.1 Properties of Graphene 1 1.2 Production of Graphene 4 1.2-1 Direct Exfoliation of graphite 6 1.2-2 Graphene Oxide (GO) 7 1.2-3 Chemical Reduction of GO 9 1.2-4 Thermal Exfoliation and Reduction 11 1.3 Characterization of Graphene 12 1.3-1 Layer Size and Number 12 1.3-2 Identifying Chemical Modification 19 1.4 Graphene Oxide Dispersions in Organic Solvents 22 1.5 Graphene/Polymer Nanocomposites 24 1.6 Motivation 31 CHAPTER 2 EXPERIMENTAL SECTION 33 2.1 Materials 33 2.2 Dissolution Tests 33 2.3 Preparation of Graphene/PEO Composites 33 2.4 Characterizations 34 CHAPTER 3 RESULTS AND DISCUSSION 36 3.1 Characterization of Graphene Oxide 36 3.1-1 Functional Groups on GO 36 3.1-2 The Degree of Oxidation of GO 39 3.1-3 Layer Checking of GO 40 3.1-4 Scanning Electron Microscope (SEM) Characterization of GO 42 3.1-5 Atomic Force Microscopy Characterization of GO 44 3.2 Morphology of PEO/GO Nanocomposites 45 3.2-1 Interactions Between GO and PEO 45 3.2-2 Smaller-Length Scale Structure of the Nanocomposites Probed by WAXS 47 3.2-3 The Orientation of GO in GO/PEO Nanocomposites 50 3.2-4 Larger-length Scale Morphology and TEM Image of PEO/GO Composites 54 3.3 Crystallization Behavior of GO-Based PEO composites 56 3.3-1 Crystallinity of GO/PEO Nanocomposites 56 3.3-2 Crystallization Kinetics Analysis of PEO/GO Nanocomposites 59 3.3-3 Growth Rate Analyzed by Polarized Optical Microscope (POM) 62 3.3-4 Relationship between morphology and crystallization of PEO/GO nanocomposites. 66 CHAPTER 4 CONCLUSIONS 68 CHAPTER 5 REFERENCE 70

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