| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
고분자가공/복합재료 |
| 제목 |
Influence of amino-functionalized MoS2 nanosheets on fracture toughness of epoxy nanocomposites |
| 초록 |
In this study, branched polyethyleneimine (b-PEI)-assisted exfoliation of MoS2 nanosheets (MoS2¬-PEI) was carried out. These non-covalently functionalized MoS2-PEI nanosheets were employed as toughening agents for epoxy composites. The contents of MoS2-PEI nanosheets were maintained at weight fractions lower than 0.16 wt%. The epoxy composites exhibited a 67% increase in fracture toughness (KIC) and a corresponding 101% increase in fracture energy (GIC) at nanosheets loadings as small as 0.06wt.% (MP-6). The overall flexural modulus (E) and strength (σ) were not highly responsive to the addition of the MoS2-PEI nanosheets. The dramatically improved mechanical properties of the epoxy composites can be attributed to the good interfacial interaction between the MoS2-PEI¬ nanosheets owing to the presence of b-PEI molecules, their inherent strength, high aspect ratio, and excellent barrier effect. |
| 저자 |
shahina Riaz1, 박수진2
|
| 소속 |
1inha Univ., 2Department of Chemistry |
| 키워드 |
Epoxy; Nanocomposites; Surface energy; Fracture toughness; Elastic modulus |
| E-Mail |
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