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Deciphering the Code of Poly(L-lactic acid) Monofilament Achieving Orientation Limit
Gutian Zhao1, Bin Wang1, Yuting Hou1
1School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacturing of Precision Medicine Equipment, Southeast University, Nanjing, 211189, China.
Small (Weinheim an Der Bergstrasse, Germany)
|July 24, 2025
Summary
Achieving ultra-strong and tough Poly(L-lactic acid) (PLLA) fibers through an oriented forming strategy. This method optimizes chain orientation limits for high-performance biodegradable materials.
Area of Science:
- Polymer Science
- Materials Science
- Biomaterials Engineering
Background:
- Controlling semi-crystalline polymer properties relies on understanding chain orientation limitations.
- Developing high-performance biodegradable materials is essential for sustainable applications.
Purpose of the Study:
- To achieve ultra-strong and tough Poly(L-lactic acid) (PLLA) monofilament using an oriented forming strategy.
- To investigate the multiscale structural variations and their impact on mechanical properties.
Main Methods:
- Utilized an oriented forming strategy to create PLLA monofilaments.
- Characterized the multilayer coaxial structure, including nanofibrils, microfibrils, transcrystallinity, and spherulites.
- Analyzed the relationship between chain orientation limits and material performance.
Main Results:
- Developed PLLA monofilaments with a remarkable elastic modulus (13.26 GPa), breaking strength (1.14 GPa), and toughness (120.42 MJ·m⁻³).
- Demonstrated superior performance compared to other reported biodegradable fibers.
- Identified a correlation between nanofibril disintegration to the limit and enhanced mechanical properties.
Conclusions:
- The oriented forming strategy effectively pushes the limits of chain orientation in PLLA.
- This approach provides a pathway for achieving extremely high performance in semi-crystalline polymers.
- The findings offer a foundation for decoding orientation limits and designing advanced biodegradable materials.
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