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노즐의 소수성 코팅에 의한 EHD 제트의 액적 토출 현상 비교 연구
Yong-Jae Kim(김용재),Jae Yong Choi(최재용),Sang Uk Son(손상욱),Ki Cheol Ahn(안기철),Hyun Joon Keum(금현준),Suk Han Lee(이석한),Do Young Byun(변도영),Han Seo Ko(고한서) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
An EHD (Electro-Hydro-Dynamic) jet for electrostatic inkjet head shows advantages to print micro-size patterns using various inks because it can generate sub-micron droplets and can use highly viscous inks. Thus, many researchers in industrial fields are concerned about the EHD jet in these days. Since the basic principle of the EHD jet is to form a droplet from an apex of meniscus at the end of the nozzle, the ejection mechanism can be changed by the shape of the meniscus. The stable ejection of the droplet is greatly affected by the shape of the meniscus which is also influenced by surface characteristics of the nozzle, electric potential and ink properties. Experiments have been performed using the nozzles with hydrophilic and hydrophobic coatings in this study. The hydrophobic nozzle forms the stable droplets in wider range of the electric potential than the hydrophilic nozzle does.
노즐의 표면 특성과 액체 전기 전도도에 의한 EHD 제트의 액적 토출 현상 비교 연구
김용재(Yong-Jae Kim),최재용(Jae-Yong Choi),손상욱(Sang Uk Son),금현준(Hyun Joon Keum),안기철(Ki Cheol Ahn),이석한(Sukhan Lee),변도영(Doyoung Byun),고한서(Han Seo Ko) 한국가시화정보학회 2008 한국가시화정보학회 학술발표대회 논문집 Vol.- No.2
An EHD (Electro-Hydro-Dynamic) jet for electrostatic inkjet head shows advantages to print micro-size patterns using various inks because it can generate sub-micron droplets and can use highly viscous inks. Thus, many researchers in industrial fields are concerned about the EHD jet in these days. Since the basic principle of the EHD jet is to form a droplet from an apex of meniscus at the end of the nozzle, the ejection mechanism can be changed by the shape of the meniscus. The stable ejection of the droplet is greatly affected by the shape of the meniscus which is also influenced by surface characteristics of the nozzle, electric potential and ink properties. Experiments have been performed using the nozzles with hydrophilic and hydrophobic coatings in this study. The hydrophobic nozzle forms the stable droplets in wider range of the electric potential than the hydrophilic nozzle does. Larger droplets have been formed from liquids with relatively high electric conductivity.