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Electrospinning Fundamentals: Optimizing Solution and Apparatus Parameters
Published on: January 21, 2011
Mechanisms and control of silk-based electrospinning
Feng Zhang1, Baoqi Zuo, Zhihai Fan
1Jiangsu Province Key Laboratory of Stem Cell Research, Medical College, Soochow University , Suzhou 215006, People's Republic of China.
Biomacromolecules
|February 4, 2012
Summary
Silk fibroin (SF) nanofibers are crucial for regenerative medicine. Controlling SF nanostructure and concentration during electrospinning allows precise control over nanofiber diameter and formation for advanced biomaterials.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Regenerative Medicine
Background:
- Silk fibroin (SF) nanofibers are valuable in regenerative medicine due to their biocompatibility, mechanical strength, and tunable degradation.
- Electrospinning is a common method for producing SF nanofibers, but the underlying formation mechanisms require further investigation for optimal control.
Purpose of the Study:
- To investigate the mechanism of silk fibroin (SF) electrospun nanofiber formation.
- To understand the influence of SF nanostructure and concentration on spinnability and fiber diameter control.
Main Methods:
- Regenerated SF solutions with varying nanostructures (nanospheres and nanofilaments) were prepared by controlling the drying process of SF films.
- The spinnability and viscosity of SF solutions were evaluated at different concentrations and nanostructures.
- The diameter of electrospun SF fibers was measured in relation to SF concentration and nanostructure.
Main Results:
- SF nanofilaments exhibited better spinnability and lower viscosity compared to SF nanospheres, particularly below 10% protein concentration.
- The morphology of SF in solution, specifically its nanostructure, critically influences electrospun fiber formation.
- Increasing SF nanofilament concentration from 6% to 12% resulted in a gradual increase in electrospun fiber diameter from 50 nm to 300 nm.
Conclusions:
- SF nanostructure significantly impacts spinnability and diameter control during electrospinning, offering a controllable method beyond traditional process parameters.
- This study provides insights into tailoring SF electrospun nanofibers for applications in biomaterials, drug delivery, and tissue engineering scaffolds.
