Study on the Preparation and Properties of Graphene Oxide/Epoxy Composites
| Autor: | Chen, Chong-Guang, 陳重光 |
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| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 This research studied on the enhancing the dispersibility of graphene in the epoxy matrix, and improving the thermal conductivity of graphene oxide/epoxy composites. First, we use Hummers Method to oxidize graphene, after oxidized the graphene oxide can become more dispersed in the epoxy, and we use IR, RAMAN, SEM, XRD, XPS to observe the change of chemical structure. Later on we discuss the fabrication of composite, including the curing of epoxy, different solvent, the amount of GO added. Secondly, we synthesis copolymer PEB dispersant to improve the dispersibility of graphene oxide in the epoxy. PEB dispersant is prepared from Ethylene glycol phenyl ether acrylate and 2-[[(Butylamino)carbonyl]oxy] ethyl acrylate through a free radical polymerization. The chemical structure is verified from their H-NMR and FT-IR spectra. Later we discuss the monomer ration and initiator would influence the thermal conductivity, and we use SEM to observe the dispersibility of graphene in the epoxy, DSC for the thermal stability. We also add aluminum nitride as second filler which is to believe increasing the 3D network, therefore improve the thermal stability and thermal conductivity. The result shows by adding the PEB dispersant in the graphene oxide, the chemical structure difference can be know from FT-IR, PEB had bond with graphene oxide. SEM shows more dispersed graphene in the epoxy, DSC with higher Tg, thermal conductivity increase from 5wt% 2.56W/mk to 3.75W/mk about 46% higher, additional aluminum nitride can also increase thermal conductivity, additional 20wt% aluminum nitride can increase up to 4.12W/mk about 60%. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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