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Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers

Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers

Published on: September 4, 2017

Reinforcing silk scaffolds with silk particles.

Rangam Rajkhowa¹, Eun Seok Gil, Jonathan Kluge

¹Centre for Material and Fibre Innovation, Deakin University, Geelong, Victoria, Australia.

Macromolecular Bioscience

|February 19, 2010

Summary

Silk fibroin scaffolds were reinforced with silk particles, significantly improving mechanical strength and slowing degradation. This advancement enhances silk

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Area of Science:

Biomaterials Science
Polymer Chemistry
Tissue Engineering

Background:

Silk fibroin is a versatile protein polymer with applications in biomaterials and tissue engineering.
Developing robust silk-based scaffolds is crucial for advanced biomedical applications.

Purpose of the Study:

To enhance the mechanical properties and degradation resistance of silk fibroin scaffolds.
To investigate the effect of incorporating silk particles into silk fibroin scaffolds.

Main Methods:

Preparation of porogen-leached scaffolds from aqueous and HFIP silk solutions.
Reinforcement of scaffolds via the addition of silk particles.
Characterization of mechanical properties (compressive modulus, yield strength), porosity, and pore interconnectivity.

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Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers

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Main Results:

HFIP-based silk scaffolds with added silk particles showed a ~40-fold increase in specific compressive modulus and yield strength.
Partial solubility of silk particles in HFIP led to high interfacial cohesion, enhancing mechanical properties.
Scaffold porosity decreased from ~90% to ~75% with 200% particle reinforcement, while maintaining pore interconnectivity.
Incorporated silk particles reduced the rate of enzymatic degradation of the scaffolds.

Conclusions:

Silk particle reinforcement is an effective strategy to significantly improve the mechanical performance of silk fibroin scaffolds.
The enhanced scaffolds exhibit controlled porosity and reduced degradation rates, making them suitable for tissue engineering.
This approach offers a promising route for developing advanced, mechanically robust silk-based biomaterials.