• Surface Modification of Polyurethane Film Using Atmospheric Pressure Plasma
  • Yang IY, Myung SW, Choi HS, Kim IH
  • 대기압 플라스마에 의한 폴리우레탄 필름의 표면 개질
  • 양인영, 명성운, 최호석, 김인호
Abstract
Commercial polyurethane film (PU) was modified with Ar plasma ionized in dielectric barrier discharge (DBD) plate-type reactor under atmospheric pressure. We measured the change of the contact angle and the surface free energy with respect to the plasma treatment conditions such as treatment time, RF-power, and Ar gas flow rate. We also optimized the plasma treatment conditions to maximize the surface peroxide concentration. At the plasma treatment time of 70 sec, the power of 120 W and the Ar gas flow rate of 5 liter per minute (LPM), the best wettability and the highest surface free energy were obtained. The 1,1-diphenyl-2-picrylhydrazyl (DPPH) method confirmed that the surface peroxide concentration was about 2.1 nmol/cm2 at 80 W, 30 sec, 6 LPM.

상업용 폴리우레탄(PU) 필름의 표면 개질 목적으로 대기압에서 플라스마를 발생시키기 위한 dielectric barrier discharge(DBD) 구조의 평판형 플라스마 반응기 내에서 이온화된 아르곤 플라스마를 사용하였다. 플라스마 처리 공정변수인 처리 시간, 처리 RF-power, 아르곤 가스 유속을 변화시켜가며 접촉각을 측정하여 젖음성과 표면 자유 에너지 변화를 알아보았고, 필름 표면 위에 과산화물을 제대로 도입시키기 위해 플라스마 처리 공정변수를 최적화하였다. 대기압 플라스마 처리 시간 70초, RF-power 120 W, 아르곤 가스유속 6 liter per minute(LPM)에서 가장 높은 젖음성과 표면 자유 에너지 값을 보였고, 1,1-diphenyl-2-picrylhydrazyl(DPPH) 법을 사용하여 PU 필름의 표면에 생성된 과산화물의 농도를 정량한 결과, 처리 시간 30초, RF-power 80 W, 아르곤 가스유속 6 LPM의 플라스마 처리 조건에서 최대 2.1 nmol/cm2의 과산화물이 생성되었다.

Keywords: atmospheric pressure plasma; polyurethane film; surface free energy; DPPH method; peroxide

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  • Polymer(Korea) 폴리머
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    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
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This Article

  • 2005; 29(6): 581-587

    Published online Nov 25, 2005

  • Received on Aug 30, 2005
  • Accepted on Sep 27, 2005