Control of Macromolecule Chains Structure in a Nanofiber

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Mechanical properties are crucial for nanofiber membranes.
• Electrospinning is a common method for nanofiber preparation, but resulting materials often have poor mechanical strength compared to natural silk.
• Improving the mechanical properties of electrospun nanofibers is an ongoing challenge.

Purpose of the Study:

• To design an air vortex electrospinning device capable of controlling macromolecular chain structure within nanofibers.
• To investigate how air vortex strength influences nanofiber structure and mechanical properties.
• To enhance the mechanical performance and pore size of nanofibers through controlled air vortex electrospinning.

Main Methods:

• Development of a novel air vortex electrospinning device.
• Application of controlled weak and strong air vortices during the electrospinning process.
• Analysis of macromolecular chain entanglement and fiber adhesion to understand structural changes.

Main Results:

• A weak air vortex induced a DNA-like structure in macromolecule chains, significantly improving mechanical properties.
• A strong air vortex promoted adhesion between nanofibers, further enhancing mechanical strength and increasing pore size.
• The air vortex electrospinning method offers a tunable approach to optimize nanofiber membrane performance.

Conclusions:

• The designed air vortex electrospinning device effectively controls macromolecular chain structure and fiber assembly.
• This technique provides a viable strategy to overcome the limitations of traditional electrospinning regarding mechanical properties.
• The enhanced nanofibers exhibit improved mechanical strength and tunable pore sizes, broadening their application potential.