Article
Thermodynamics
Qian Kong, Shiqi Yang, Qisi Wang, Zhentao Wang, Qingming Dong, Junfeng Wang
Summary: An electrified jet in electrohydrodynamic atomization can further disintegrate into fine drops, resulting in highly charged and monodispersed drops. The dynamics of the breakup process and the operating parameters that affect spraying modes were analyzed. The geometrical forms of the drops/jets emitted were classified into periodic dripping, pulsating-jet, stable-jet, and unstable jet. Propylene glycol and n-octanol were specifically discussed. Electric stresses significantly accelerated the jet velocity and the breakup length increased with liquid flow rate. The jet position gradually deflected off the needle axis with an increase in electric potential. "Size separation effect" was found to improve printing quality by removing highly charged satellite drops.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Ji Yeop Kim, Sang Ji Lee, Gwang Yeol Baik, Jung Goo Hong
Summary: Electrostatic spraying is a method of atomizing fluid using high voltage, with various spray modes identified based on applied voltage and flow rate. Experiment evaluated Sauter mean diameter and distribution in each spray mode, confirming smallest droplet size in cone jet mode. Droplet size in cone jet mode linearly increased with viscosity and flow rate.
Article
Engineering, Chemical
Yaxing Man, Cunshan Zhou, Benu Adhikari, Yuchuan Wang, Tiantian Xu, Bo Wang
Summary: Bovine lactoferrin nanoparticles (LFNPs) with average diameters of 100-200 nm and Zeta potential of around 20 mV were successfully prepared using high voltage electrohydrodynamic atomization (EHDA), and later encapsulated in an alginate matrix to form microcapsules. EHDA-treated LFNPs exhibited substantially higher free radical scavenging activity compared to native LFb, and also reduced the undesirable exposure of LFb on the surface of LFb-NaAlg microcapsules.
JOURNAL OF FOOD ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Ezgi Cinan, Sumeyye Cesur, Merve Erginer Haskoylu, Oguzhan Gunduz, Ebru Toksoy Oner
Summary: This study successfully fabricated levan nanoparticles using the EHDA technique, which showed monodisperse morphology and smooth surfaces. Characterization in terms of drug release and cell culture studies indicated the potential use of these nanoparticles in drug delivery systems for wound healing and tissue engineering applications.
Article
Mechanics
Zhentao Wang, Qian Kong, Bin Li, Jiameng Tian, Kai Yu, Junfeng Wang
Summary: In this study, the instability and breakup process of an electrified jet of anhydrous ethanol in the electrohydrodynamic simple-jet mode are visualized and analyzed. The evolution of the breakup morphology of the charged jet in the simple-jet mode is described, and the operating window of the simple-jet mode is determined to be within a specific range of Weber number and electric Bond number.
Article
Thermodynamics
Yunchao Li, Zhentao Wang, Qian Kong, Bin Li, Hai Wang
Summary: This study investigates the absorption of sulfur dioxide by charged calcium hydroxide aqueous solution droplets generated in electrohydrodynamic atomization. Experimental tests were conducted using a laboratory scale device, focusing on the factors of droplet diameter and specific charge. It was found that the reduction in droplet diameter and the increase in specific charge resulted in a significant increase in the liquid-gas contacting area and the uniform distribution of charged droplets. The absorption efficiency was considerably improved due to the disintegration of liquid and the repulsive forces in the electric field. The activity of calcium ions was enhanced, and there were interactions between gas molecules and liquid molecules in the electric field.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Polymer Science
Iriczalli Cruz-Maya, Rosaria Altobelli, Marco Antonio Alvarez-Perez, Vincenzo Guarino
Summary: There is growing interest in using micro-sized hydrogels to mimic cell niche structure and selected functionalities for tissue regeneration. In this study, bioactive composite microgels were optimized through electrohydrodynamic atomization (EHDA) for dentin-pulp complex regeneration. The mineralized microgels were successfully used to support in vitro osteogenesis, serving as an interesting model for studying dental tissue regeneration.
Article
Chemistry, Physical
Xuemu Li, Jianxin Deng, Lili Liu, Ran Duan, Dongliang Ge
Summary: Graphite was introduced to enhance the mechanical properties and oxidation resistance of WS2 coatings, while sharkskin-like biomimetic textures improved adhesion strength between coatings and substrates. The combination of improved adhesion strength, oxidation resistance, and antifriction capability of micro/nano-textures resulted in a low friction coefficient and extended wear life.
APPLIED SURFACE SCIENCE
(2021)
Article
Mechanics
Kuldeep Baghel, Zahra Zahra, Seongsu Cho, Jinkee Lee
Summary: This study investigates the characteristics of electrohydrodynamic (EHD) jetting using phosphate buffered saline (PBS), including the effects of flow rate and voltage on electrospray regimes, droplet size, generation frequencies, and velocities. Regime maps are generated for PBS 1X, PBS 10X, and DI water, with a focus on the Spindle regime.
Article
Chemistry, Physical
Ran Wang, Jianxin Deng, Zhihui Zhang, Dongliang Ge
Summary: This study successfully enhanced the microstructure and mechanical properties of Ni3Al matrix composite films through the design of micro-laminated films. The Ni3Al-Cr3C2-MoS2/Ni3Al-Ti3SiC2-MoS2 (NMCs-3) micro-laminated films exhibited denser structure, stronger orientation, and better adhesion, as well as superior tribological properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yunchao Li, Zhentao Wang, Bin Li, Mingdong Ju, Kai Yu
Summary: Electrohydrodynamic (EHD) atomization is a physical process where a liquid is disintegrated into monodisperse fine drops under the influence of an external electric field and pumped through a capillary tube. This study used molecular dynamics (MD) methods to numerically investigate the EHD atomization behaviors under various operating parameters. The effects of electric potential, liquid flowrate, sodium chloride concentration, and temperature on the atomization process were systematically examined and analyzed. The findings provide a microscopic insight into EHD atomization and have the potential to optimize operating parameters and improve efficiency.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Nanoscience & Nanotechnology
Trung-Hieu Vu, Sharda Yadav, Canh-Dung Tran, Hong-Quan Nguyen, Tuan-Hung Nguyen, Thanh Nguyen, Tuan-Khoa Nguyen, Jarred W. Fastier-Wooller, Toan Dinh, Hoang-Phuong Phan, Hang Thu Ta, Nam-Trung Nguyen, Dzung Viet Dao, Van Thanh Dau
Summary: Electrohydrodynamic atomization (EHDA) is a precise method for controlling particle size and production rate, but the highly charged particles generated by conventional methods are not suitable for inhalation drug delivery. Researchers have developed a self-propelled EHDA system that can generate and deliver charge-reduced particles in one step. This system uses a sharp electrode to create ion wind, reducing the cumulative charge in the particles and transporting them to a target position. The technique has shown effective control over the morphologies of polymer products and has been proven safe for bioapplications, making it a versatile tool for drug delivery.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Long Ye, Yichao Lv, Yuanjiang Zhao, Zhuxian Zhou, Youqing Shen, Liming Jiang
Summary: Coaxial electrostatic atomization technology was successfully used to encapsulate volatile fragrances in silk fibroin matrices with l-menthol as a model compound. The fragrance-loaded core-shell fibers and capsules were fabricated with controllable structural characteristics. The fragrance release profile and rate were influenced by the degree of crystallinity of SF matrix and the shell thickness.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
J. Valloton, A-A Bogno, M. Rappaz, H. Henein
Summary: In the study, rapid solidification of Al-Cu droplets of eutectic composition using Impulse Atomization was observed, revealing two different morphologies of eutectic structures. A model of eutectic solidification was developed, showing good agreement between experimental measurements and the model for the regular eutectic spacing, but a difference in the predicted spacing of the undulated eutectic, attributed to possible coarsening during the solidification process.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Akbar Mohammadi Zardkhoshoui, Bahareh Ameri, Saied Saeed Hosseiny Davarani
Summary: Mixed metal selenides have attractive structural characteristics and unique physicochemical properties, making them promising electrode materials for energy storage devices. Multi-shelled nickel-manganese selenide hollow spheres and double-shell nickel-iron selenide hollow spheres were successfully fabricated for supercapacitors, demonstrating excellent electrochemical performance and desirable longevity.