Continuous Dual-Track Fabrication of Polymer Micro-/Nanofibers Based on Direct Drawing.

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Traditional nanofiber fabrication methods often involve complex setups, high costs, or limitations with specific material properties.
• A need exists for a straightforward, scalable, and cost-effective method for producing continuous polymer micro- and nanofibers.

Purpose of the Study:

• To introduce and demonstrate a novel automated single-step system for fabricating suspended micro- and nanodiameter polymer fibers.
• To characterize the capabilities and limitations of the proposed track spinning method.

Main Methods:

• Developed an automated track spinning system using two oppositely rotating tracks for continuous fiber drawing.
• Investigated fiber formation from polymer solutions including polyvinyl acetate (PVAc) and polyurethane (PU).
• Analyzed fiber morphology and diameter in relation to draw length and solution properties.

Main Results:

• Successfully fabricated continuous micro- and nanofibers with smooth, uniform morphology.
• Achieved polymer nanofibers with diameters as small as 450 nm and lengths up to 255 mm.
• Demonstrated the method's compatibility with high-viscosity polymer solutions and melts.

Conclusions:

• Track spinning offers a simple, inexpensive, and versatile alternative for polymer nanofiber production.
• The nozzleless and electric-field-free approach overcomes limitations of other methods, enabling fabrication from challenging materials.
• The system's design allows for potential enhancements in fiber yield and precision through track modification.