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C3F6 플라즈마 중합에 의한 금속표면의 소수성 향상

The Enhancement of Hydrophobicity on Metal Surface with C3F6 Plasma Polymerization

소현 임대재 김영채^†

Hyun Soh Dae-Jae Yim Young Chai Kim^†

한양대학교 화학공학과, 136-791 서울시 성동구 행당동 17

Department of Chemical Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea

HWAHAK KONGHAK, February 2003, 41(1), 80-85(6), NONE

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Abstract

단량체인 hexafluoropropene(C3F6) 기체를 플라즈마 중합하여 구리표면에 증착된 불소화합물이 표면 소수성 성향의 관점에서 조사되었다. 표면 소수성이 최대가 되는 조건을 찾기 위해 플라즈마 변수를 변화시켰으며 플라즈마 출력과 압력 증가에 따라 증착속도는 최대 60[μg cm(-2)min(-1)를 나타냈다. 100 W, 1 torr, 10 min의 공정변수에서 표면 자유에너지가 8.8[dyne cm(-1)]로 물과의 접촉각이 127.75 °인 소수성 표면을 확인하였다. 플라즈마 증착된 표면은 CF, CF2 등의 불화탄소 기능기가 표면에 도포 되었으며 C/F 비가 2이하를 나타내었다. 구리표면에 형성된 불소화합물은 1 μm 이하의 두께로 얇고 균일한 형태를 지니고 있으며 표면 조도의 증가가 접촉각을 더욱 상승시켜 구리표면이 합성고분자인 PTFE(108 °) 보다 소수성이 향상되었다.

Fluorocarbon, which was deposited on copper surface by plasma polymerization with monomer C3F6, was investigated from the point of the hydrophobicity. Plasma parameters were changed to find the maximum conditions of the surface hydrophobicity. Rate of deposition with increasing plasma power and pressure showed the value of 60[μg cm(-2)min(-1)]. It was found that the surface energy was 8.8[dyne cm(-1)] and contact angel with water was 127.75 ° at the optimum conditions, 100 W, 1 torr, 10 min. The surface with plasma deposition was coated fluorocarbon groups such as CF, CF2 and C/F atomic ratio showed the value of less than 2. Deposited fluorocarbon indicated thin and homogeneous film with the thickness of 1 μm. Contact angle of plasma deposited Cu surface showed more hydrophobic than that of synthesis polymer PTFE(108 °).

Keywords

Plasma C3F6 Hydrophobicity Contact Angle Surface Modification

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