Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Effect of the Addition of Propanol to PVC Solution on the Structure of Thin Film and its Surface Property

프로판올 첨가에 따른 PVC 용액의 박막 형성과 표면 특성에 미치는 영향

  • Park, Jae Nam (Department of Chemical Engineering, Kangwon National University) ;
  • Shin, Young Sik (Department of Chemical Engineering, Kangwon National University) ;
  • Lee, Won Gyu (Department of Chemical Engineering, Kangwon National University)
  • 박재남 (강원대학교 화학공학과) ;
  • 신영식 (강원대학교 화학공학과) ;
  • 이원규 (강원대학교 화학공학과)
  • Received : 2014.08.18
  • Accepted : 2014.11.28
  • Published : 2015.02.10
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Abstract

Polyvinylchloride (PVC) thin films having a microporous structure could be prepared by using the solubility difference in solvents. PVC thin film with a water contact angle of $150^{\circ}$ or more was obtained from the PVC solution consisting of the mixture of tetrahydrofuran as a solvent and propanol as a non-solvent. In the drying process of dip-coated PVC film, the increase of drying temperature reduced the tendency of roughened surface, which led the decrease of surface hydrophobicity. As the addition of propanol in the solution with 1 wt% PVC increased, the uniformity of surface roughness was improved. In the case of oxygen plasma treatments, even though the surface structure of PVC thin film was not notably changed, the surface property of the film was changed from the super-hydrophobicity to hydrophilicity as a function of the plasma exposing time.

범용성 고분자인 폴리염화비닐(PVC)의 용매에 대한 용해도 차이를 이용하여 미세다공성 구조의 표면을 갖는 초소수성 박막을 제조하고 박막의 형상에 따른 표면 특성을 분석하였다. 용매로 테트라하이드로퓨란과 비용매인 프로판올로 구성된 PVC 용액을 딥코팅으로 물과의 접촉각이 $150^{\circ}$ 이상인 초소수성 PVC 박막을 얻었다. PVC 박막 제조과정의 표면 건조공정에서 온도가 증가는 표면 거칠기를 상대적으로 감소시켜 표면의 소수성 특성 저하를 가져왔다. PVC 용액에 비용매인 프로판올의 양을 증가시키면 코팅 박막의 표면 거칠기가 균일해지고 접촉각을 증가시키는 효과를 보였다. 초소수성의 PVC 박막 표면을 산소 플라즈마 처리하면 노출시간에 따라 친수성으로 표면특성이 변환됨을 확인하였다.

Keywords

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