نوع مقاله : مقاله پژوهشی
نویسندگان
دانشکده مواد، دانشگاه صنعتی اصفهان، اصفهان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Hydrogels, as hydrophilic 3D scaffolds, play an important role in absorbing biological fluids and providing mechanical stability for tissue regeneration. In this study, novel composite hydrogels based on silk fibroin modified with thiol groups and metal-organic framework (Zn-Bio MOF) containing zinc ion and adenine ligand were designed and synthesized for tissue engineering applications. Pure silk fibroin was extracted and modified by adding thiol groups via L-cysteine linkage. Changes in Fourier transform infrared spectroscopy included a decrease in the intensity of absorption peaks at 1650 and 3300 cm⁻¹ and the appearance of new peaks associated with S-S and S-H bonds, confirming these modifications. Metal-organic framework (Zn-Bio MOF) was synthesized with zinc (II) ion and adenine ligand through hydrothermal process, with an average diameter of 0.39±0.12 nm and a specific surface area of 1138.3 m2/g. Three types of composite hydrogels including modified silk fibroin-based hydrogel, modified silk fibroin-based hydrogel gelled by Fenton reaction and composite hydrogel containing Zn-Bio MOF at different concentrations were prepared. Material characterization was performed by scanning electron microscopy and X-ray diffraction. Investigation of swelling and degradation properties showed that hydrogels containing Zn-Bio MOF nanoparticles showed better mechanical behavior with increased compressive modulus and toughness, weight loss (about 30% within 72 hours) and controlled swelling. These results indicate that Zn-Bio MOF composite hydrogels have great potential for use in tissue engineering and biological applications.
کلیدواژهها [English]