Work

Microgel particle-laden drop impact on a nanofiber material with varying wettability: Effect of liquid impalement

Year: 2024

Type: article

Abstract: Hypothesis The control of microgel particle-laden drop deposition considering liquid impalement inside nanofiber materials with different wettability enhances the efficiency of bioprinting polymer layers in tissue engineering. Experiments The study deals with the impact of a microgel particle-laden drop of the water-agar solution onto nanofiber mats of different wettability. The effects of inertia and the competition between the wetting and antiwetting pressures within the liquid impalement on the hydrodynamic behavior of drops in the spreading and contraction phases are examined. Hydrophilic mat representing a full water absorption coating is manufactured by electrospinning from a mixture of polycaprolactone (PCL) and polyvinylpyrrolidone (PVP); hydrophobic – from polytetrafluoroethylene (PTFE). The micro- and nanoscale characteristics of nanofiber mats are analyzed by scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively. Findings A physical model of liquid flow under an impacting microgel particle-laden drop along and inside the micro- and nanostructures of nanofiber mats is proposed. Empirical expressions for predicting the drop impact hydrodynamics are derived that by introducing the impalement factor, close in physical meaning to the Euler number, consider, along with inertia, the difference between the wetting and antiwetting pressures.

Source: Physics of Fluids

DOI: 10.1063/5.0225817

Authors: Maxim Piskunov, Alexandra Piskunova, Alexander Ashikhmin, Evgeny Melnik, Evgeny Bolbasov

Institutions: Tomsk Polytechnic University, Surgut State University

Language: English

Topic: Fluid Dynamics and Heat Transfer

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funder: Ministry of Science and Higher Education of the Russian Federation

Award: G7556603561