High-Voltage Power Supply for Electrospinning: Controlled Nanofiber Structure Optimization
Electrospinning is a widely used technique for producing high-performance nanofibers with applications in filtration, biomedical scaffolds, and functional composite materials. The high-voltage power supply is a critical component, providing a stable and precisely controllable electric field that stretches polymer solutions or melts into continuous fibers. The voltage magnitude, pulse characteristics, response speed, and output stability directly affect fiber diameter uniformity, alignment, and microstructure.
Optimization of nanofiber structures relies on the high-voltage power supply’s ability to deliver continuous adjustable output. Fiber diameter is influenced by electric field strength, solution viscosity, and extrusion rate. By precisely controlling the applied voltage, the electrospinning system can produce uniform fibers with consistent diameters. Ripple must be minimized (typically below 0.01%) to prevent transient voltage fluctuations that could lead to irregular fiber formation or breakage.
Multi-channel high-voltage configurations allow independent control of multiple spinnerets and collector electrodes. By locally adjusting the electric field, fiber density and alignment can be spatially regulated, which is essential for creating complex or layered structures. Closed-loop control systems monitor fiber diameter, charge density, and solution flow rate in real time. Feedback algorithms dynamically adjust voltage, and temperature and humidity compensation ensures process stability over extended operation.
Pulse-modulated high-voltage output can also be used to transiently alter the electric field, controlling fiber stretching rate and surface morphology, enabling customizable nanostructures. These capabilities allow electrospinning systems to achieve high-precision, reproducible, and tunable nanofiber production, with the high-voltage supply serving both as the energy source and as a fine-tuning control element for material quality.
