http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Photocatalytic Characteristics of TiO2 Thin Films Deposited by TiO2 Thin Films Deposited byPECVD
Dong Lyun Cho,Ho Min,김종호,Geun-Seop Cha,Gwi-Sung Kim,Byung Hoon Kim,Seung-Ho Ohk 한국공업화학회 2007 Journal of Industrial and Engineering Chemistry Vol.13 No.3
iO2 thin films were deposited on glass slides through PECVD with TTIP as a precursor and argon as a carrier gas; their photocatalytic characteristics were investigated. The films were amorphous when deposited at low temperatures, but crystalline with anatase structures at temperatures higher than 300 oC. The film deposited at 400 oC and 5 W exhibited excellent adhesion to the substrate and the best photocatalytic activity. The photocatalytic activity was evaluated based on the degradation efficiency of MB and the bactericidal effect against E. coli under UV-A light. The concentration of MB reduced from 5.0 to 3.5 ppm in 3 h; 99 % of E. coli (2 × 105 CFU/mL) was killed in 1 h.
프로필렌의 플라즈마 처리로 개질된 목분이 복합재료의 기계적 특성에 미치는 영향
조동련 ( Dong Lyun Cho ),하종록 ( Jong-rok Ha ),김병선 ( Byung Sun Kim ),이진우 ( Jin Woo Yi ) 한국복합재료학회 2017 Composites research Vol.30 No.2
프로필렌의 플라즈마 처리로 목분을 표면 개질하여 복합재 기지인 PP와 상용성을 가지게 하였다. 프로필렌을 플라즈마로 처리하여 증착된 소수성 박막 필름의 화학적 구조는 PP와 흡사하였다. 목분과 PP는 이축 압출기에 의해 펠렛으로 만들어 졌고 50 wt% wood powder/PP 복합재료는 사출 성형기에 의해 성형되었다. 인장강도와 굴곡 강도는 최고 7.59% and 12.43%까지 향상되었으며 파단면에 대한 SEM 관찰로 플라즈마 중합이 계면 접착력과 기계적 특성을 향상시킨 것을 볼 수 있었다. Wood powders were surface-modified by plasma-treating propylene to make them compatible with PP matrix in WPC(wood powder composite). The plasma treatment of propylene resulted in the deposition of an ultrathin hydrophobic film which had the chemical structure similar to that of polypropylene. Wood powder and polypropylene were mixed to pellets by twin screw extruder and then 50 wt% wood powder/PP composites were produced by an injection machine. Tensile strength and flexural strength were improved by 7.59% and 12.43% at the maximum respectively. SEM (Scanning Electron Microscopy) observation on the fracture surface revealed that the treatment improved the interfacial bonding and the mechanical properties of the composites.
Effects of Surface Modification of the Membrane in the Ultrafiltration of Waste Water
Cho Dong Lyun,Kim Sung-Hyun,Huh Yang Il,Kim Doman,Cho Sung Yong,Kim Byung-Hoon The Polymer Society of Korea 2004 Macromolecular Research Vol.12 No.6
An ultrafiltration membrane (polyethersulfone, PM 10) was surface-modified by treating it with low-temperature plasmas of oxygen, acrylic acid (AA), acetylene, diaminocyolohexane (DACH), and hexamethyldisiloxane (HMDSO). The effects that these modifications have on the filtration efficiency of a membrane in waste water treatment were investigated. The oxygen, AA, and DACH plasma-treated membranes became more hydrophilic. The water contact angles ranged from < $10^{\circ}\;to\;55^{\circ}$ depending on the type of plasma and the treatment conditions. The oxygen plasma-treated membranes displayed a higher initial flux $(312-429\%),$ but lower rejection $(6-91\%),$ than did an untreated membrane. The AA plasma-treated membranes displayed lower or higher initial flux $(42-156\%),$ depending upon the treatment conditions, but higher rejection $(224-295\%)$ in all cases. The DACH plasma-treated membranes displayed lower initial flux. All of them, especially the AA plasma-treated membrane, displayed improved fouling resistance with either a slower or no flux decline. Acetylene and HMDSO plasma-treated membranes became more hydrophobic and displayed both lower initial flux and lower fouling resistance.