안경렌즈 위에 코팅한 발수막의 성분 및 특성연구 (The composition and characteristic of water-repellent films coated on an Ophthalmic lens)

서지정보

· 발행기관 : 대한시과학회
· 수록지 정보 : 대한시과학회지 / 16권 / 4호 / 563 ~ 572페이지
· 저자명 : 박문찬, 김대종

초록

목 적: 곡률이 없는 고 굴절률 안경렌즈위에 발수 막을 코팅하여 발수 막의 성분과 특성에 관한 연구를 하였다.
방 법: 전자빔 증착 장치를 이용하여 곡률이 없는 고 굴절률 안경렌즈위에 발수 막을 5nm, 10nm, 20nm, 30nm, 40nm로 두께로 코팅하였다. 발수 막의 성분을 관찰하기 위해 ATR-FTIR 장비를 사용하였고, 분광 타원 법을 이용하여 발수 막의 굴절률과 두께를 측정하였다. 또한 발수 발유 성을 알기위해 물과 CH2I2를 사용하여 접촉각을 구했으며, 비부착성을 알기위해 마찰계수를 구했다.
결 과: FTIR 측정 장치를 이용하여 발수 막의 성분을 관찰한 결과, 유기불소를 포함한 유기화합물이라는 알 수 있었다. 그리고 분광 타원 법에 의한 계산한 발수 막의 굴절률은 d선인 587.56nm에서 1.6026이며 아베수 49이었다. 물에 대한 접촉각은 발수코팅을 안한 고 굴절률렌즈 표면에서 78.1°이고 발수 코팅 막의 두께가 20nm일 때 109.9°이며, 그 이후 두께가 두꺼워짐에 따라 조금씩 증가한다. CH2I2에 대한 접촉각은 코팅을 안 한 고 굴절률렌즈 표면에서 34.1°이고 코팅 막의 두께가 20nm에서 93.7°이며, 그 이후 코팅 막의 두께가 커짐에 따라 접촉각이 포화되는 것을 알 수 있었다. 발수 막의 마찰계수는 코팅을 안한 고 굴절률렌즈 표면에서는 0.410이고 코팅 막의 두께가 5nm에서 0.626으로 커진 후, 두께가 두꺼워짐에 따라 점점 작아져 40nm에서 0.167이었다.
결 론: 고 굴절률렌즈위에 코팅한 발수 막은 유기불소를 포함한 유기화합물이며, 굴절률은 1.6026이었다. 발수 발유 접촉각은 코팅막이 20nm일 때 각각 109.9°과 93.7°이며, 발수 막의 동마찰계수는 코팅막의 두께가 40nm에서 0.167이었다.

영어초록

Purpose: This paper was to study the composition and characteristic of water-repellent films coated on a high refractive index Ophthalmic lens by no curvature.
Methods: The water-repellent films on a high refractive index Ophthalmic lens were coated with thicknesses of 5nm, 10nm, 20nm, 30nm, 40nm by using the electron beam vapor deposition apparatus. ATR-FTIR equipment was used to observe the components of the films, and refractive index and thickness of the film were measured using a spectroscopic ellipsometry method. The contact angles with water and CH2I2 of the films were also obtained to see the water and oil repellency, and the coefficients of friction of the films were calculated to find the non-adhesion of the films with a dust and a foreign matter.
Result: By FTIR result of observing component of the film, it was found that the water-repellent film was the organic compound containing organic fluorine. The refractive index of the film was measured with 1.6026 at 587.56nm wavelength and Abbe’s number of the film was calculated with 49 from Spectroscopic Ellipsometry method. The contact angles with water of the films were 78.1° for non-coating high refractive index lens and 109.9° when a thickness of the film was 20nm, and were increased little by little as the thickness of the film was thicker. The contact angle with CH2I2 was 34.1° for non-coating high refractive index lens and was 93.7° when a thickness of the film was 20nm. It was found that the contact angle was saturated with increasing of thickness. The kinetic coefficient of friction of the film was 0.410 for non-coating high refractive index lens, and 0.626 when a thickness of the film was 5nm. It became smaller in accordance with the thickness of the coating film, and finally 0.167 at 40nm thickness of the film.
Conclusion: Water-repellent film on Ophthalmic lens was contained the organic fluorine compound, and the refractive index was 1.6026, the contact angles of water and oil repellent were 109.9° and 93.7° respectively when the coating film was 20nm thickness, the kinetic coefficient of friction of water-repellent film was 0.167 at 40nm thickness of the film.

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