One-step electro-spinning/netting technique for controllably preparing polyurethane nano-fiber/net

Area of Science:

• Materials Science and Engineering
• Nanotechnology
• Polymer Science

Background:

• Electro-spinning/netting (ESN) is a powerful technique for fabricating nanofiber/net (NFN) membranes in a single step.
• Polyurethane (PU) is a versatile polymer with potential for advanced material applications.
• Controlling the nanostructure of membranes is crucial for optimizing their performance.

Purpose of the Study:

• To report a controllable fabrication method for polyurethane (PU) nano-fiber/net (NFN) membranes using electro-spinning/netting (ESN).
• To investigate the influence of solution properties and ESN parameters on the resulting NFN architecture.
• To explore the potential applications of the fabricated PU NFN membranes.

Main Methods:

• Utilized the electro-spinning/netting (ESN) process for the one-step fabrication of PU NFN membranes.
• Controlled the nanostructure by adjusting solution properties and ESN process parameters.
• Characterized the resulting NFN membranes, focusing on their unique architecture and properties.

Main Results:

• Successfully fabricated PU NFN membranes with controllable structures, including nanofibers and 2D soap bubble-like nano-nets.
• Achieved fine control over the nanoscaled NFN architecture by tuning solution and ESN parameters.
• The PU nano-nets, composed of interlinked nanowires (5-40 nm diameter), exhibited an extremely large specific surface area, high porosity, and large stacking density.

Conclusions:

• The developed ESN method offers a controllable route to synthesize versatile PU NFN membranes with unique nanostructures.
• The resulting membranes possess excellent characteristics suitable for diverse high-performance applications.
• Potential applications include ultrafiltration, specialized protective clothing, ultrasensitive sensors, and catalyst supports.