[논문]산화그래핀(GO)의 플라스틱(PS) 표면 코팅방법에 대한 연구

박재범; 이지훈; 허증수; 박단비; 임정옥

doi:10.5695/jkise.2021.54.2.77

산화그래핀(GO)의 플라스틱(PS) 표면 코팅방법에 대한 연구
Investigation on the polystyrene surface coating method of graphene oxide 원문보기

한국표면공학회지 = Journal of the Korean institute of surface engineering, v.54 no.2, 2021년, pp.77 - 83

박재범 (경북대학교 융복합시스템공학과) , 이지훈 (경북대학교 융복합시스템공학과) , 허증수 (경북대학교 융복합시스템공학과) , 박단비 (경북대학교 생명의학연구소) , 임정옥 (경북대학교 생명의학연구소)

Abstract ▼ AI-Helper

In this study, we investigated various coating methods of graphene oxide on the surface of a petri dish made of polystyrene and analyzed the physical and chemical properties of the coated surface. For coating, spinning, spraying and pressing methods were attempted. The coated surface was characterized by SEM, Raman Spectroscopy, AFM, FT-IR, UV-Vis Spectroscopy and Contact Angle measurement. By spin coating and spray coating, well distributed graphene oxide in the form of multiple islands on the plastic surface with an average size of 5 to 20㎛ are observed by SEM, and high binding energy between graphene oxide and plastic surface is measured by AFM. In case of hand press coating, graphene oxide of 10㎛ or more was observed, and low surface energy was measured. By FT-IR and Raman Spectroscopy analysis, surface coating of graphene oxide was confirmed.

주제어

표/그림 (9)

그림 Fig. 1 Schematic diagram of the fabrication process
그림 Fig. 2 SEM micrograph(x1500) of spin coating (a), spray coating (b), and hand-press coating (c) Compared to spray coating, in the case of spin coating, it was observed that the size of the coated GO is larger. In the case of hand-press coating, it was observed that GO with a size of 10μm or more entirely coated the surface.
그림 Fig. 3 Raman spectrum of US GO 0.375mg spin coating (A), US GO 0.375mg spray coating (B) and GO powder 0.375mg hand-press coating (C)
그림 Fig. 4 FT-IR of GO powder 0.375mg hand-press coating
그림 Fig. 5 AFM images of roughness, spin coating (32.259nm) (a), spray coating(17.771nm) (b), and handpress coating(47.181nm) (c) B the line, the height difference of spin coating is observed as 196.67nm, spray coating as 192.22nm, hand-press coating as 255.33nm. The difference in height of hand-press coating is greater than that of spray coating and spin coating.
표 Table. 1 Surface adhesion intensity of samples, Spin coating (a) Spray coating (b) and Hand-press coating (c) It was confirmed that the surface adhesion intensity was large in the order of hand-press coating (4.05GPa), spin coating (27.05GPa), and spray coating (42.96GPa). The larger the surface adhesion intensity is, the greater the force between the tip and the GO on the surface.
그림 Fig. 6 UV/Vis spectrophotometer of samples, control (A), US GO 0.375mg spray coating (B), US GO 0.375mg spin coating (C) and Charm graphene Co. Ltd. GO 0.375mg hand-press coating (D) Average transmittance is A: 84.04%T, B: 78.70%T, C: 34.04%T. Hand-press coating shows lower transmittance than other coating methods, which is evaluated by the difference between the coating method and the graphene oxide layer.
표 Table. 2 Contact angle of sample Spin coating and spray coating rendered similar hydrophilic property to the surface while hand press coating produced h ydrophobic su rface.
표 Table. 3 Summary of characteristics according to coating method

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