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Dialdehyde Starch as a Cross-Linking Agent Modifying Fish Collagen Film Properties.
Patrycja Brudzyńska1, Karolina Kulka-Kamińska1, Łukasz Piwowarski2
1Department of Biomaterials and Cosmetic Chemistry, Nicolaus Copernicus University in Torun, Gagarin 7, 87-100 Torun, Poland.
Materials (Basel, Switzerland)
|April 13, 2024
Summary
Dialdehyde starch (DAS) effectively modifies fish collagen films, enhancing mechanical strength and thermal stability. This cross-linking process reduces hydrophilicity and swelling, showing potential for broader applications of fish-derived collagen materials.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Materials Engineering
Background:
- Fish collagen is a valuable biopolymer with potential applications in various fields.
- Modifying collagen films can improve their properties for specific uses.
- Cross-linking is a common method to enhance the stability and performance of biopolymer films.
Purpose of the Study:
- To investigate the effects of dialdehyde starch (DAS) as a cross-linking agent on fish collagen films.
- To characterize the changes in mechanical, thermal, swelling, and surface properties of modified collagen films.
- To evaluate the potential of DAS for improving fish collagen film applicability.
Main Methods:
- Fish collagen films were prepared and cross-linked with varying concentrations of dialdehyde starch (DAS).
- Fourier Transform Infrared Spectroscopy (FTIR) and Atomic Force Microscopy (AFM) were used for material characterization.
- Mechanical testing (Young's Modulus, breaking force, elongation at break, tensile strength), thermal analysis, swelling tests, and contact angle measurements were performed.
Main Results:
- Cross-linking with DAS increased breaking force, elongation at break, and tensile strength, while decreasing Young's Modulus.
- Contact angle measurements indicated reduced hydrophilicity in DAS-modified films.
- Modified films showed lower swelling degrees in PBS, with 1% DAS samples exhibiting the highest swelling.
- AFM analysis revealed DAS influenced the surface morphology, with the lowest roughness (Rq) observed at 2%Coll_2%DAS.
- Cross-linked collagen films demonstrated improved thermal stability compared to pure collagen samples.
Conclusions:
- Dialdehyde starch (DAS) is a promising cross-linking agent for fish collagen films.
- DAS modification enhances mechanical properties and thermal stability while reducing hydrophilicity and swelling.
- The study suggests that DAS can increase the applicability of fish skin-derived collagen in biomaterial applications.
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