Preparation of Ultra-Fine Fiber Web from Polyvinylidene Fluoride-Hexafluoropropylene (PVDF-HFP) by Electrospinning and Their Characteristics for Filters

전기방사에 의한 Polyvinylidene fluoride-hexafluoropropylene (PVDE-HFP) 극세 섬유 웹의 제조와 필터 특성

  • Jo, Jang-Ik (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Kim, Chan (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Park, Sang-Hee (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Yang, Kap-Seung (Faculty of Applied Chemical Engineering, Chonnam National University)
  • 조장익 (전남대학교 응용화학부) ;
  • 김찬 (전남대학교 응용화학부) ;
  • 박상희 (전남대학교 응용화학부) ;
  • 양갑승 (전남대학교 응용화학부)
  • Published : 2004.08.01

Abstract

Polyvinylidene fluoride-hexafluoropropylene (PVDF- HFP)/acetone solutions were electrostatically spun into sub-micron fibers at various conditions. The variables chosen were polymer concentration, applied voltage, flow rate, and tip to collector distance (TCD). The average fiber diameter increased with an increase in the polymer concentration, however, the trend for applied voltage was not monotonous showing minimum diameter of 0.8 ${\mu}{\textrm}{m}$ at 15.6 kV. The fiber diameter was also depended on TCD; the minimum fiber diameter at 15cm. The flow rate of the solution was another factor; lower the flow rate, finer the fiber diameter. The PVDF-HFP web was also treated for air filter application i.e., water contact angle and air permeability. Though the web was consiting of ultra-fine fibers, the contact angle with water was still high as 157$^{\circ}$ representing high hydrophobicity. The web showed high air permeability of 12.69 cc/$\textrm{cm}^2$. sec, and the value decreased with increase in thickness of the web.

Keywords

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