Functional Mesostructured Electrospun Polymer Nonwovens with Supramolecular Nanofibers

Area of Science:

• Materials Science
• Nanotechnology
• Supramolecular Chemistry

Background:

• Hierarchically mesostructured nonwovens are crucial for advanced applications due to increased surface area and functionality.
• Complex fiber morphologies enable effective immobilization of metal nanoparticles, enhancing filter media efficiency and selectivity.

Purpose of the Study:

• To develop novel hierarchically mesostructured nonwovens with a unique barbed wire-like morphology.
• To demonstrate the controlled assembly of supramolecular structures onto electrospun fibers for enhanced functionality.

Main Methods:

• Coaxial electrospinning of polystyrene fibers decorated with patchy worm-like micelles (prepared via crystallization-driven self-assembly of a triblock terpolymer).
• Solution processing of 1,3,5-benzenetricarboxamides with peripheral N,N-diisopropylaminoethyl substituents to form supramolecular short fibers.
• Directed self-assembly of supramolecular nanofibers onto functionalized polystyrene fibers.

Main Results:

• Successful fabrication of hierarchically mesostructured nonwovens with a barbed wire-like morphology.
• Demonstrated directed self-assembly and fixation of supramolecular nanofibers on electrospun fibers, facilitated by micelle patches.
• Effective immobilization of individual palladium nanoparticles on the supramolecular nanofibers, showcasing the material's functionality.

Conclusions:

• The developed hierarchically mesostructured nonwovens offer a promising platform for advanced materials.
• The unique morphology and functionalization enable efficient metal nanoparticle immobilization.
• These materials are attractive candidates for applications in filtration, selective separation, and heterogeneous catalysis.