期刊
GELS
卷 8, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/gels8050296
关键词
hydrogel; polyelectrolyte; synthetic polymer; swelling; mechanical characterization; compression; stress-relaxation; cyclic loading; cartilage lesion; substitute material
资金
- Open Access Fund of Leibniz Universitat Hannover
- Bundesministerium fur Bildung und Forschung (BMBF, Federal Ministry of Education and Research) within Zwanzig20 [03ZZ0933L]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [SFB 1270/1-299150580]
Hydrogels have gained increasing interest in various fields, including their applications as immobilization matrices in (bio)catalysis and in the medical sector for drug delivery systems, contact lenses, biosensors, electrodes, and tissue engineering. Natural hydrogels from collagen, hyaluronic acid, and gelatin are known for their biocompatibility but often lack stability, reproducibility, and mechanical strength. Synthetic hydrogels, on the other hand, offer tunable swelling and mechanical properties, reproducibility, and lower costs.
Hydrogels have become an increasingly interesting topic in numerous fields of application. In addition to their use as immobilization matrixes in (bio)catalysis, they are widely used in the medical sector, e.g., in drug delivery systems, contact lenses, biosensors, electrodes, and tissue engineering. Cartilage tissue engineering hydrogels from natural origins, such as collagen, hyaluronic acid, and gelatin, are widely known for their good biocompatibility. However, they often lack stability, reproducibility, and mechanical strength. Synthetic hydrogels, on the other hand, can have the advantage of tunable swelling and mechanical properties, as well as good reproducibility and lower costs. In this study, we investigated the swelling and mechanical properties of synthetic polyelectrolyte hydrogels. The resulting characteristics such as swelling degree, stiffness, stress, as well as stress-relaxation and cyclic loading behavior, were compared to a commercially available biomaterial, the ChondroFiller (R) liquid, which is already used to treat articular cartilage lesions. Worth mentioning are the observed good reproducibility and high mechanical strength of the synthetic hydrogels. We managed to synthesize hydrogels with a wide range of compressive moduli from 2.5 +/- 0.1 to 1708.7 +/- 67.7 kPa, which addresses the span of human articular cartilage.
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