Abstract
Natural gelatin-based hydrogels are usually soft and fragile, and the preparation of hydrogels with elastic structures normally requires modification of gelatin chains or addition of chemical crosslinking agents. In this study, fish gelatin hydrogels with strong structures were simply fabricated by soaking original tilapia gelatin hydrogel in (NH4)2SO4 solution at appropriate concentrations, and the effects of (NH4)2SO4 concentrations on hydrogels were explored. Results showed that (NH4)2SO4 solution with 15 wt% mass concentration could strengthen gel structure. Compared with original hydrogel, hardness, storage modulus and loss modulus of treated hydrogels were all increased. Microstructures of hydrogels were more compact and water binding capacity increased. Fourier transform infrared spectroscopy (FT-IR) and atomic force microscopy (AFM) indicated that (NH4)2SO4 which were kosmotropic ions in Hofmeister series could introduce stronger hydrophobic interaction and electrostatic interactions, causing the gelatin chains in the preformed hydrogel grid closely aggregated. Thus, the gel structure was enhanced.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.