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Updated: May 26, 2026
07:59
Molecular Entanglement and Electrospinnability of Biopolymers
Published on: September 3, 2014
Polymer dynamics in semidilute solution during electrospinning: a simple model and experimental observations.
Israel Greenfeld1, Arkadii Arinstein, Kamel Fezzaa
1Department of Mechanical Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 21, 2011
Summary
Electrospinning creates unique polymer nanofibers by rapidly stretching polymer solutions. This study reveals how extreme acceleration during electrospinning forms the essential microstructure, enhancing material properties.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Electrospun polymer nanofibers exhibit superior mechanical and thermodynamic properties due to their unique microstructure.
- This microstructure is established during the electrospinning process, involving high stretching rates and rapid solvent evaporation.
Purpose of the Study:
- To investigate the dynamics of highly entangled semidilute polymer solutions under extreme longitudinal acceleration during electrospinning.
- To understand the initial stage of microstructure formation in electrospun polymer nanofibers.
Main Methods:
- Theoretical modeling of polymer network dynamics under extreme longitudinal acceleration.
- X-ray phase-contrast imaging of electrospinning jets for poly(ethylene oxide) and poly(methyl methacrylate) semidilute solutions.
Main Results:
- Theoretical predictions indicated substantial longitudinal stretching and transversal contraction of the polymer network.
- Experimental verification showed a significant increase in polymer concentration at the jet center within 1 mm of initiation.
Conclusions:
- The proposed mechanism of rapid polymer network stretching and concentration is crucial for the initial stage of nanofiber microstructure formation.
- Understanding these dynamics is key to controlling and optimizing the properties of electrospun polymer nanofibers.
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