Electrorheological characterization of complex fluids used in electrohydrodynamic processes: Technical issues and challenges

• Type: Another Publication in an International Scientific Journal
• Date: 2024

Authors

Rijo, PC (Author) Other; Galindo Rosales, FJ (Author) FEUP

Journal

Title: Applied Rheology

Vol. 34

ISSN: 1430-6395

Publisher: Vincentz

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-017-PMY

DOI: 10.1515/arh-2024-0024

Abstract (EN): The electrorheological (ER) characterization of low-viscosity fluids is paramount for producing micro- and nanoscale products through electrohydrodynamic (EHD) techniques, such as EHD-jet printing, electrospray, and electrospinning. Key properties such as viscosity, surface tension, dielectric properties, electrical conductivity, and relaxation time significantly influence both the quality and properties of the final products and the efficiency of the industrial process. ER characterization is essential for studying the macroscopic effects of the interaction between these physicochemical properties under controlled flow kinematics. Researchers may face several technical challenges in performing rigorous ER characterization of moderate conductive fluids typically used in EHD processes. This characterization is crucial for formulating inks compatible with these processes and for understanding fluid dynamics in EHD processes to ensure stable printing conditions and achieve high-resolution, accurate prints. This work highlights the inherent limitations of current ER cells and proposes methodologies to mitigate their impact on measurement accuracy. Furthermore, we propose the use of microfluidic devices as a solution for the ER characterization of moderate conductive fluids.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14