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Constructing Stiff β-Sheet for Self-Reinforced Alginate Fibers
Xuelai Xie1, Min Cui1, Tianyuan Wang1
1State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Materials Science and Engineering, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, China.
Materials (Basel, Switzerland)
|July 13, 2024
Summary
Researchers developed stronger alginate fibers using a nature-inspired self-reinforcing strategy. This method enhances mechanical properties like strength and toughness without additives, preserving biodegradability for potential biological applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Alginate fibers possess limitations in mechanical properties, restricting their widespread application.
- Developing enhanced alginate-based materials is crucial for advanced biological and industrial uses.
Purpose of the Study:
- To introduce a novel self-reinforcing strategy for fabricating alginate fibers with improved mechanical performance.
- To investigate the role of ethanol in modifying the secondary structure of sodium alginate (SA) for reinforcement.
- To evaluate the effectiveness of combined β-sheet reinforcement and Ca2+ crosslinking on fiber properties.
Main Methods:
- Utilized a modified wet-spinning process with a coagulation bath containing CaCl2 and ethanol.
- Employed rheological analysis to understand the reinforcing mechanism of β-sheet structures.
- Quantified improvements in tensile strength and toughness of the reinforced alginate fibers.
Main Results:
- Ethanol in the coagulation bath increased the β-sheet content in sodium alginate (SA).
- The stiff β-sheet structures provided a reinforcing mechanism, enhancing modulus and strength.
- Self-reinforced alginate fibers showed a 39.0% increase in tensile strength and a 71.9% increase in toughness compared to controls.
- The strategy preserved alginate's inherent degradability without additional additives.
Conclusions:
- The proposed self-reinforcing strategy effectively enhances the mechanical properties of alginate fibers.
- Understanding β-sheet structures in polysaccharides offers a pathway for creating stronger, tougher biomaterials.
- Reinforced alginate fibers demonstrate significant potential for diverse biological applications due to their improved performance and retained biodegradability.
