June 6 – 10 am – Amphi Charpak Emulsion-Templated Synthesis of Functional Microcapsules Using Droplet Microfluidics Hyomin Lee Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Korea.
Microfluidically generated emulsions provide a powerful platform for the synthesis of structurally and compositionally tunable microcapsules, offering advanced capabilities in the encapsulation, retention, and controlled release of functional materials. By precisely controlling multi-phase flows and fluid– fluid interfacial properties, we exploit complex emulsions—particularly double and triple emulsions— as versatile templates for engineering novel microcapsule systems. In particular, we develop fluorocarbon oil-based triple emulsions featuring an ultrathin intermediate layer that physically separates the inner cargo from the outer polymeric shell, enabling high retention of challenging actives. Furthermore, by harnessing electrostatic complexation between oppositely charged surfactants at the emulsion interfaces, we demonstrate a robust and generalizable approach to stabilize these emulsions and expand microcapsule diversity without the need for intricate surfactant synthesis or spreading coefficient control. This platform allows for multiple solidification strategies— including polymerization, freezing, and solvent extraction—offering a true degree of freedom in capsule design for applications in drug delivery, cosmetics, and food.
June 6 – 10:35 am – Amphi Charpak Particle Adhesion on Thin Liquid Layer J. Parka, C. S. Moona, J. T. Phamb, H.-J. Buttc, and S. Wooha
a Department of Chemical Engineering Chung-Ang University, Korea
b Department of Chemical Engineering, University of Cincinnati, US
c Max Planck Institute for Polymer Research, Germany
Dust filters with small pores have been worldwide used to clean air and now are everywhere in our daily life. Dust, also called particulate matter (PM), are captured at the pore of the filters, therefore smaller pores result in higher PM capturing efficiency. However, air becomes more difficult to pass through the filter as the pores get smaller, which decreases the air permeability and increases the air pressure drop across the filter. This dilemma, caused by the low adhesion of solid PMs to the dry solid surface of the filters, has been one of the most important issue to be overcome on dry dust filter for several decades. Here, inspired by human nose filtering system with thin mucus coated nasal hairs, we create a dry dust filter having a thin non-volatile liquid layer at the surface of the pores. The strong adhesion of PM on liquid thin film improves the PM capturing efficiency without affecting the air permeability of the filter. The liquid thin film coated filter particularly exhibits outstanding dust filtering capability at fast speed filtering system with no re-dispersion of captured PMs. In addition, the suppressed PMs re-dispersion allows a new bi-directional dust filtering. The Particle Removing Oil-coated Filter (PRO) filter proposes a new paradigm of dust filtering and opens a new door for fast and efficient air cleaning.
June 6 – 11:25 am – Amphi Charpak, Protective Polymer Coatings on Silicon Anodes, Gi-Ra Yi, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Korea.
Silicon (Si) anodes are considered a promising next-generation high-capacity anode material due to their theoretical specific capacity of approximately 4,200 mAh/g, which is more than ten times that of conventional graphite. However, their practical application is significantly hindered by a drastic volume expansion of up to 300% during lithiation and delithiation, leading to severe structural instability, rapid capacity fading, and short cycle life. Furthermore, Si-based anodes are known to exhibit poor thermal stability under high-temperature or high-rate cycling conditions, making them susceptible to safety issues such as thermal runaway and fire hazards. To address these challenges, surface coating technologies using polymer thin films have been developed to stabilize the Si particle surface. In particular, chemically crosslinked polymer coatings have been introduced to enhance long- term cycling stability. This presentation will introduce the design and performance characteristics of Si nanoparticle-based anode materials coated with polymer thin films, as well as a polymer gel electrolyte system developed in conjunction. Finally, we will discuss an in-situ formation method for flame-retardant polymer coatings, designed to mitigate abnormal temperature increases during abuse conditions. This approach aims to capture radicals generated by the breakdown of the solid electrolyte interphase (SEI), thereby improving battery safety under extreme conditions.
1. Journal of Materials Chemistry A, 13(7), 5213-5219(2025).
2. Journal of Materials Chemistry A 11, 1676-1683 (2023).
3. Applied Surface Science, 571, 151294 (2022).
4. ACS Energy Letters 3(9), 2522-2258 (2018).