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Structural and Viscoelastic Properties of Bacterial Cellulose Composites: Implications for Prosthetics Full article

Journal Polymers
ISSN: 2073-4360
Output data Year: 2024, Volume: 16, Article number : 3200, Pages count : 17 DOI: 10.3390/ polym16223200
Tags bacterial cellulose; polysaccharide composite; composite material; viscoelastic characteristics of materials; fibrillar structure; strength properties
Authors Pogorelova N 1 , Parshin D 2 , Lipovka A 2 , Besov A 2 , Digel I 3 , Larionov P 4
Affiliations
1 Department of Food and Food Biotechnology, Omsk State Agrarian University
2 Lavrentyev Institute of Hydrodynamics, Novosibirsk
3 Institute for Bioengineering, FH Aachen—University of Applied Sciences
4 Novosibirsk Research Institute of Traumatology and Orthopaedics

Funding (1)

1 Министерство науки и высшего образования Российской Федерации FWGG-2021-0009

Abstract: This study investigates the morphological, mechanical, and viscoelastic properties of bacterial cellulose (BC) hydrogels synthesized by the microbial consortium Medusomyces gisevii. BC gel films were produced under static (S) or bioreactor (BioR) conditions. Additionally, an anisotropic sandwich-like composite BC film was developed and tested, consisting of a rehydrated (S-RDH) BC film synthesized under static conditions, placed between two BioR-derived BC layers. Sample characterization was performed using scanning electron microscopy (SEM), atomic force microscopy (AFM), rheometry, and uniaxial stretching tests. To our knowledge, this is the first study to combine uniaxial and rheological tests for BC gels. AFM and SEM revealed that the organization of BC fibrils (80 ± 20 nm in diameter) was similar to that of collagen fibers (96 ± 31 nm) found in human dura mater, suggesting potential implications for neurosurgical practice. Stretching tests demonstrated that the drying and rehydration of BC films resulted in a 2- to 8-fold increase in rigidity compared to other samples. This trend was consistent across both small and large deformations, regardless of direction. Mechanically, the composite (BioR+S-RDH) outperformed BC hydrogels synthesized under static and bioreactor conditions by approx. 26%. The composite material (BioR+S-RDH) exhibited greater anisotropy in the stretching tests compared to S-RDH, but less than the BioR-derived hydrogels, which had anisotropy coefficients ranging from 1.29 to 2.03. BioR+S-RDH also demonstrated the most consistent viscoelastic behavior, indicating its suitability for withstanding shear stress and potential use in prosthetic applications. These findings should provide opportunities for further research and medical applications.
Cite: Pogorelova N. , Parshin D. , Lipovka A. , Besov A. , Digel I. , Larionov P.
Structural and Viscoelastic Properties of Bacterial Cellulose Composites: Implications for Prosthetics
Polymers. 2024. V.16. 3200 :1-17. DOI: 10.3390/ polym16223200 РИНЦ
Dates:
Submitted: Aug 19, 2024
Accepted: Oct 15, 2024
Published print: Nov 18, 2024
Published online: Nov 18, 2024
Identifiers:
Elibrary: 75047197
Citing: Пока нет цитирований
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