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Molecular Entanglement and Electrospinnability of Biopolymers
Published on: September 3, 2014
About the albumin structure in solution and related electro-spinnability issues
Omri Regev1, Rafail Khalfin, Eyal Zussman
1Russell Berrie Nanotechnology Institute, Technion - Israel Institute of Technology, Haifa 32000, Israel.
International Journal of Biological Macromolecules
|May 11, 2010
Summary
Unfolded bovine serum albumin (BSA) protein in specific solutions forms electrospun nanofibers. This protein unfolding, characterized by small-angle X-ray scattering, is crucial for producing stable, continuous fibers.
Area of Science:
- Biomaterials Science
- Protein Chemistry
- Nanotechnology
Background:
- Bovine serum albumin (BSA) is a widely used protein in various applications.
- Protein conformation significantly influences its physical properties and processability.
- Electrospinning requires specific protein states for successful fiber formation.
Purpose of the Study:
- To investigate the relationship between BSA protein conformation and its electrospinning capability.
- To understand how different solution environments affect BSA structure.
- To identify the optimal BSA state for producing electrospun nanofibers.
Main Methods:
- Small-angle X-ray scattering (SAXS) was used to analyze BSA structure in water, TFE, and TFE/beta-ME solutions.
- Zeta potential measurements were performed to assess solution charge.
- Electrospinning was conducted to evaluate fiber formation and stability.
Main Results:
- SAXS revealed three BSA conformational states: folded (water), partially unfolded (TFE), and unfolded (TFE/beta-ME).
- BSA in water showed a highly negative zeta potential, while BSA in TFE had near-zero charge.
- Only the unfolded BSA in TFE/beta-ME solution was successfully electrospun into long, continuous, and mechanically stable nanofibers.
Conclusions:
- BSA protein unfolding is essential for successful electrospinning.
- The conformational state of BSA, influenced by the solution environment, dictates its ability to form nanofibers.
- Unfolded BSA in TFE/beta-ME offers a promising route for producing high-quality protein-based nanofibers.
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