Viscosity Effect on the Electrospray Characteristics of Droplet Size and Distribution

Kim, Ji Yeop; Lee, Sang Ji; Baik, Gwang Yeol; Hong, Jung Goo

doi:10.1021/acsomega.1c04119

Cited by 19 publications

(18 citation statements)

References 39 publications

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“…The droplet sizes of the ramified and rotating jets were approximately 11 and 16% greater than that of the cone jet, respectively. As seen in the spray image in Figure , the length of the cone and the width of the jet formed in the spindle mode were relatively larger compared to those of the cone jet, possibly because the droplets were directly sprayed …”

Section: Resultsmentioning

confidence: 99%

“…As seen in the spray image in Figure 1 , the length of the cone and the width of the jet formed in the spindle mode were relatively larger compared to those of the cone jet, possibly because the droplets were directly sprayed. 35 …”

Section: Resultsmentioning

confidence: 99%

“…Since the focal distance was very short, the aperture was reduced to F11 to ensure an adequate depth of field for the subject. 35 …”

Section: Methodsmentioning

confidence: 99%

“…The relative humidity, which could affect the spray pattern, droplet size, and droplet distribution, was set at 40 ± 10% for the experiment by installing a cover and adjusting the internal humidity. 35 …”

Section: Methodsmentioning

confidence: 99%

“…The viscosity was measured using an SV-10 kinematic viscometer, and the surface tension was measured using a dynamic contact angle and surface tension meter DCA-200. The dielectric constant was measured using a liquid dielectric constant meter 871 …”

Section: Methodsmentioning

confidence: 99%

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Spray Mode and Monodisperse Droplet Properties of an Electrospray

2022

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As a method of fluid atomization via application of a high voltage, electrospraying forms more uniform droplets than other spraying modes. This approach involves various spraying modes depending on the applied voltage. Most previous studies on electrospraying focused on the cone jet mode, which has limited applications since the applied voltage has a narrow range. To overcome this limitation, it is necessary to consider alternative spray modes, which require an in-depth understanding of their characteristics. To compare different spray modes, an investigation was conducted based on experimental parameters and fluid properties. In this study, a total of nine modes were identified, and the droplet characteristics in four modes were compared. The maximum deviation of the Sauter mean diameter (SMD) between the spray modes was approximately 1.7 times, and the SMD standard deviation was up to 2.8 times. In addition, the conditions required to realize Coulomb fission and monodisperse distribution depending on the Rayleigh critical charge (RSD < 6.76) were compared and examined.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Since the focal distance was very short, the aperture was reduced to F11 to ensure an adequate depth of field for the subject. 35 …”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Spray Mode and Monodisperse Droplet Properties of an Electrospray

2022

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Electrospray Deposition for Electronic Thin Films on 3D Freeform Surfaces: From Mechanisms to Applications

Lai,

Di,

Zhao

et al. 2024

Adv Materials Technologies

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Electronic thin films play a ubiquitous role in microelectronic devices and especially hold great promise for flexible electronics, energy conversion and storage, and biomedical applications. Their characterizations, including ultra‐thin, large‐scale dimensions, stretchability, and conformal ability to curved or 3D structures, present new challenges for thin film fabrication based on the solution method. Electrospray deposition emerges as a feasible method for fabricating large‐area, flexible, and curved films. It offers many advantages such as material adaptability, controlled atomization, tunable film morphology, and shape retention on complex substrates. These advantages make it a key method for fabricating high‐performance films on large‐area, 3D surfaces. This work presents a comprehensive review of the mechanisms, processes, applications, and equipment of electrospray deposition. First, the fundamental principles of electrospray deposition are introduced, focusing on the mechanisms and scaling laws of liquid atomization. Moreover, the control methods for electrospray modes, structures, and film morphology are discussed. These advanced control methods pave the way for the fabrication of smart skins, wearable devices, and energy conversion and storage components. Finally, this work introduces three types of electrospray deposition manufacturing equipment to illustrate the advantages of electrospray deposition for large‐area, and 3D surface manufacturing.

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