Nanofibers from Scalable Gas Jet Process

Area of Science:

• Materials Science and Engineering
• Polymer Chemistry
• Nanotechnology

Background:

• The production of polymer fibers with controlled diameters and morphologies is crucial for various advanced applications.
• Existing methods for polymer fiber fabrication can be complex and may not offer precise control over fiber characteristics.

Purpose of the Study:

• To report a new, simple, and effective method for producing polymer fibers using a high-velocity expanding gas jet.
• To investigate the influence of process parameters on fiber diameter, surface morphology, and arrangement.

Main Methods:

• Utilizing a high-velocity expanding gas jet to transform polymer solutions into fibers.
• Contacting the polymer solution with the gas jet at different configurations: flat surface, needle tip, and pendant drop.
• Analyzing the relationship between capillary number, polymer concentration, and resulting fiber diameter.

Main Results:

• Successfully produced polymer fibers with diameters ranging from tens of nanometers to a few micrometers.
• Achieved control over fiber surface morphology (smooth or wrinkled) and arrangement (core-shell, side-by-side).
• Observed fiber conglutination levels dependent on the collection distance from the nozzle.

Conclusions:

• The reported gas jet method provides a versatile and straightforward approach for fabricating polymer fibers with tunable properties.
• This technique holds potential for the scalable production of advanced polymer fibers for diverse technological applications.