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Tuning Collagen Molecular Aggregation Behavior: Solvent Shielding in a Biphasic Polar System for Oxidized Sodium
Lingyu Hua1,2, Fengxian Ju1,2, Zihan Shen1,2
1Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China.
Biomacromolecules
|March 24, 2026
Summary
This study introduces oxidized sodium alginate (OSA) as a sustainable cross-linker for tuning collagen aggregation. OSA effectively creates homogeneous networks, enabling the development of advanced collagen-based biomaterials.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Biotechnology
Background:
- Precise control over collagen molecular aggregation is crucial for developing functional collagen-based biomaterials.
- Existing methods for tuning collagen behavior often lack sustainability or efficiency.
Purpose of the Study:
- To develop a sustainable strategy for tuning collagen molecular aggregation behavior.
- To utilize oxidized sodium alginate (OSA) as an effective cross-linker for collagen.
Main Methods:
- Employing a biphasic solvent system of acetic acid/1-ethyl-3-methylimidazolium acetate.
- Investigating the cross-linking efficiency of OSA with collagen at varying [NH2]/[CHO] ratios.
- Utilizing molecular docking simulations to analyze collagen-OSA binding interactions.
Main Results:
- A homogeneous cross-linked collagen network was achieved due to the polar solvent environment shielding electrostatic interactions.
- The critical aggregation concentration of collagen was determined to be 1.70 mg/mL in the AA/[EMIM][Ac] system.
- Optimal cross-linking and formation of large collagen aggregates occurred beyond a [NH2]/[CHO] ratio threshold of 1:20.
Conclusions:
- Oxidized sodium alginate (OSA) provides an effective and sustainable cross-linking strategy for collagen.
- The developed method enables precise control over collagen aggregation for biomaterial fabrication.
- This approach supports biological resource valorization and the creation of high-performance collagen biomaterials.
