| 학회 |
한국고분자학회 |
| 학술대회 |
2011년 가을 (10/06 ~ 10/07, 김대중 컨벤션센터) |
| 권호 |
36권 2호 |
| 발표분야 |
고분자가공/복합재료－나노카본 고분자 복합필름 |
| 제목 |
Graphene/Waterborne Polyurethane Nanocomposites Prepared from Colloidal Dispersions |
| 초록 |
Few-layers graphene can be obtained in bulk by rapid thermal expansion of highly oxidized graphite oxide (GO). These exfoliated sheets are called functionalized graphene sheets (FGSs) because some oxygen containing groups, such as epoxy groups, remain after thermal treatment. In this study, colloidal dispersions of WPU with various particle sizes were mixed with colloidal dispersions of FGS to prepare FGS/WPU nanocomposites by casting from an aqueous mixture. That is, the finer aqueous FGS dispersions or WPU with smaller particles yielded nanocomposites with enhanced electrical conductivity and thermal resistance due to finely dispersed FGS. The FGS nucleated the crystallization of the PCL segments in WPU and improved its modulus. However, FGS inhibited crystal growth and deteriorated the tensile properties at high deformation, i.e., tensile strength and elongation at break, because the interaction between FGS and WPU hindered the chain rearrangement of WPU in the nanocomposite. |
| 저자 |
한수진, 정한모, 최진택, 오성민, 오경민, Trung Dung Dao, 박진호, 최상협
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| 소속 |
울산대 |
| 키워드 |
Polyurethane; nanocomposites; Graphene
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| E-Mail |
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