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Formation of Polypropylene Thin Films with Superhydrophobic Surface

초소수성 표면특성을 갖는 폴리프로필렌 박막형성

  • 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 : 2014.08.28
  • Accepted : 2014.10.21
  • Published : 2014.12.10

Abstract

The effects of process parameters for the formation of polypropylene film such as the polypropylene concentration in the solution, drying temperature for coating film, and variation of nano-silica content on the surface structure and property of polypropylene film have been studied. A super-hydrophobic polypropylene film with a maximum contact angle of $154^{\circ}$ was obtained at the condition of a polypropylene concentration of 30 mg/mL, a drying temperature of $30^{\circ}C$, a drying pressure of 93 mtorr for 90 min. The increase of a drying temperature reduced the contact angle by enhancing the surface smoothness of the film. The increase of nano-silica content in the composite film composed of polypropylene and silica changed the surface shape from microporous to microglobular, which led to increasing the contact angle and showed the super-hydrophobic surface property.

Keywords

Polypropylene solution;superhydrophobicity;surface property;surface roughness;thin film

Acknowledgement

Supported by : 강원대학교

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