화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.21, No.3, 317-322, June, 2010
Export Citation
폴리메틸메타아크릴레이트(PMMA) 필름의 불소화 및 그 표면특성
Fluorination of Polymethylmethacrylate (PMMA) Film and Its Surface Characterization
정민정, 임재원, 박인준1, 이영석†
  • 충남대학교 정밀응용화학과
  • 1한국화학연구원 바이오리파이너리센터
Min-Jung Jung, Jae Won Lim, In Jun Park1, and Young-Seak Lee†
  • Department of Fine Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 305-764, Korea
  • 1Research Center for Biorefinery, Korea Research Institute of Chemical Technology, Daejeon 305-343, Korea
E-mail:
초록
본 연구에서는 폴리메틸메타아크릴에이트(polymethylmethacrylate : PMMA) 표면을 친수성으로 개질하기 위하여 불소와 산소의 혼합비율을 변수로 하여 함산소불소화를 실시하였다. 함산소불소화 처리 된 PMMA 표면 및 광투과 특성을 접촉각, 표면자유에너지. X-ray 광전자 분광기(XPS), UV-Vis 분광기를 통하여 분석하였다. 함산소불소화 처리된 PMMA의 표면은 친수화 되어 물 접촉각이 69°에서 44°로 감소하였다. 또한 PMMA의 표면자유에너지가 46 mN m^(-1)에서 58 mN m^(-1)로 증가하였다. 이는 함산소불소화를 통한 PMMA표면에 친수성 관능기의 형성으로 기인하였다. 또한, XPS 분석 결과로부터 함산소불소화 처리 시 PMMA 표면에 O/C비율이 증가하였고, 불소 부분압이 증가할수록 친수성을 나타내는 C-OH 결합의
In this study, poly(methyl methacrylate) (PMMA) was treated with changing mixing ratios of F2 and O2 using oxyfluorination method for hydrophilic modification of PMMA film. For the characterizations of oxyfluorinated PMMA surface, contact angle, surface free energy, X-ray photoelectron spectroscopy (XPS) and optical transmittance (UV-vis) were carried out. After the oxyfluorination, PMMA surface became more hydrophilic showing the decrease of water contact angle from 69° to 44°. So, surface free energy of oxyfluorinated PMMA film was increased from 46 to 58 mN m^(-1). These results are attributed to hydrophilic functional groups such as hydroxyl group formed oxyfluorination method on the PMMA surface. From XPS results, it was confirmed that O/C concentration ratio on the surface of PMMA was increased, the amount of C-OH bonding which shows hydrophilicity was also largely increased from 6.7 to 24.8% with increasing fluorine partial-pressure via the oxyfluorination, The oxyfluorination conditions, room temperature, 1 bar with one mixture ratio of F2 to O2 had little influence on optical transmittance properties of PMMA film but enhanced its surface hydrophilicity. This result suggests that oxyfluorination method could be useful to change hydrophobic PMMA surface to hydrophilic.
Keywords:polymethylmethacrylate;oxyfluorination;hydrophilic surface;surface free energy;optical transmission
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