| 학회 | 한국재료학회 |
| 학술대회 | 2016년 가을 (11/16 ~ 11/18, 경주 현대호텔) |
| 권호 | 22권 2호 |
| 발표분야 | H. 한-일 재료공학 워크샵 |
| 제목 | Effect of plasma treatment on polymer surface |
| 초록 | Acrylic resin, which is a type of polymer, has excellent strength, transparency, and is widely used as a biomaterial in applications such as intraocular lenses. However, when it is used as a biomaterial, there are issues with biocompatibility because of the hydrophobic surface. Therefore, it is essential to develop methods for modifying the surface wettability of acrylic surfaces. Surface modification methods can be classified as wet processes or dry processes. The wet process has issues arising from the generation of waste fluids. On the other hand, dry processes such as plasma treatment have the advantage of not adversely affecting the environment. In this study, we attempted to modify the surface of an acrylic plate by using phase-controlled plasma. In addition, the effect of the surface treatment was evaluated by monitoring the wettability and the elemental composition of the surface. The plasma was generated by using source-gases double-excited electrodes (Figure 1) [1-2]. H2 and N2 gases were used as the source gases. Plasma treatment was conducted by varying the phase (φQ-P) of the two radio frequency (RF) power supplies and the RF used was 13.56 MHz. Plasma treatment and optical emission spectroscopy were conducted at reactor-C in the plasma reactor. The processing object was an acrylic plate. In order to determine the wettability, 20 µL of water was dropped onto the acrylic surface, and the contact angle (θ) was measured with a digital camera. Elemental composition of the surface was also analyzed with x-ray photoelectron spectroscopy (XPS). Figure 2 shows photographs of droplets on acrylic plates and the water contact angles of the acrylic surfaces before/after the plasma treatment. The surface was found to be hydrophilic after the plasma treatment. Moreover, the contact angle changed by varying the phase (φQ-P). These results indicate that phase control is useful for controlling the hydrophilicity of the surface. XPS indicated that the atomic bonding state changed after the plasma treatment. Finally, it was inferred that the low-energy species in the plasma were related to the surface hydrophilicity. |
| 저자 | Takatoshi TAGUCHI1, Hiroki WATANABE2, Tsuyoshi SUZUKI3, Mitsuya MOTOHASHI1 |
| 소속 | 1Tokyo Denki Univ., 2Tokyo, 3Japan |
| 키워드 | Polymer; Acrylic resin; Surface modification; Plasma treatment; Wettability |
