서지주요정보
정전분무를 이용한 나노입자 코팅 특성 연구 = Characteristics of coating with nanoparticles using electrospray
서명 / 저자 정전분무를 이용한 나노입자 코팅 특성 연구 = Characteristics of coating with nanoparticles using electrospray / 강영진.
저자명 강영진 ; Kang, Young-Jin
발행사항 [대전 : 한국과학기술원, 2005].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8015986

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 05002

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Electrospraying of liquid in the cone-jet mode has recently generated a great deal of interest in several technological applications. The purpose of the paper is to evaluate the electrospray characteristics of multi-nozzle system. The stable cone-jet voltage range, droplet size, droplet velocity, spray angle and spray current are selected as the main characteristics of electrospray. In addition, performance of coating with 200nm PSL (ethanol solution) using electrospray is evaluated by counting number of particles. At the standard condition, the cone-jet mode is generated by supplying ethanol at a various liquid flow rate $(5~40μl/min)$ through the syringe pump and applying a high positive voltage to a stainless-steel capillary’s tip (0.5 mm i.d., 0.9 mm o.d.). The range of the stable cone-jet mode is measured. If applied voltage is 2.5kV, the stable cone-jet mode is made at all of the range. The spray current is measured by nano electrometer. In the stable cone-jet mode and fixed flow rate, the spray current is nearly constant except 0kV of $2^{nd}$ applied voltage. But the spray current increases as the flow rate increases. The spray at the cone-jet mode is visualized using a CCD camera, a telephoto lens and argon ion laser. The spray angle including satellites is determined by the image processing. When the input voltage of guard plate is 1, 2, 3, 4, 5kV, the spray angle is about 50˚, 27˚, 20˚, 17˚, 13˚ at height 25mm. In addition, the spray angle isn’t affected by the flow rate, but the spray angle becomes smaller with the guard plate. The size distributions of electrospray droplets from the Taylor cone in cone-jet mode are measured by a laser diffraction system. At fixed flow rate (Q), the droplets produced by electrospray have fairly monodisperse size distribution. As the flow rate increases, the droplet size increases. When the flow rates are 10, 20, 30, 40μl/min, the droplet size (SMD) is about 7.5, 12.0, 15.0. 17.0 μl/min. When $2^{nd}$ applied voltage is changed, the droplet size is similar. In electrospray of multi-nozzle, the droplet size is equal to that of single-nozzle. Therefore, the effect of the guard plate and multi-nozzle on the droplet size can be ignored. The droplet velocity of electrospray is measured by LDV (Laser Doppler Velocimetry). The droplet velocity increases as $2^{nd}$ applied voltage increases. The droplet velocity is in the range of 1.5 ~ 11m/s by $2^{nd}$ applied voltage. Using electrospray, nanoparticles of PSL is coated at slide glass. Coating quality is investigated by counting number of particle. Nanoparticle is observed to be homogenous with a particle size of 200nm. The electrospray of multi-nozzle can be possible to coat nonoparticles on the wide range.

서지기타정보

서지기타정보
청구기호 {MME 05002
형태사항 xi, 90 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Young-Jin Kang
지도교수의 한글표기 : 김상수
지도교수의 영문표기 : Sang-Soo Kim
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 43-45
주제 정전분무
다중노즐
가드판
나노입자 코팅럼
잡고체
MCNP코드
Electrospray
multi-nozzle
guard plate
nanoparticle coatingtivity
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