Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE This study examines liquid-wall slip in core-shell rotary jet spinning by integrating force analysis with flow simulations of PEO/PVP solutions. SEM and TGA analyses reveal the effect of rotational speed on fiber morphology and thermal stability. A combined theoretical, numerical, and experimental approach validates the proposed model, offering guidance for the fabrication of high-performance composite fibers.

ABSTRACT
As an innovative method for composite fiber fabrication, Rotary Jet Spinning (RJS) technology exhibits significant advantages over conventional electrospinning and melt spinning techniques in terms of equipment simplicity, material versatility, energy efficiency, and production throughput. Consequently, it has attracted considerable attention in the field of fiber material science in recent years. While existing studies predominantly focus on optimizing process parameters for controlling fiber morphology and exploring applications, systematic investigations into the rheological behavior of polymer solutions within fluid reservoir systems remain limited. This study utilizes a core-shell structured RJS apparatus to conduct mechanical analysis of polymer solution dynamics, with particular emphasis on elucidating the kinematic principles governing dual-spinning solutions in the reservoir. Finite element analysis (FEA) is employed to examine fluid flow patterns in both the reservoir and nozzle during RJS operation, complemented by experimental fabrication of composite fibers using the core-shell spinning system. This research establishes a comprehensive framework that integrates theoretical modeling, computational fluid dynamics (CFD) simulations, and empirical validation. The comparative analysis confirms the validity of the proposed theoretical model, providing valuable insights for optimizing high-performance composite fiber production.