Full
Outline
In this study, we focused on the preparation of hydrogels with good biocompatibility of sodium alginate (SA), chitosan (CS), and calcium carbonate (CaCO3) by physical cross-linking. We aimed to optimize the hydrogel formulations and systematically explore their structure, physical properties, and freeze-thaw stability. The optimal formula was determined using a single factor experiment and response surface method: SA concentration was 2.14%, CS concentration was 1.7%, Ca2+ concentration was 0.31 mol/L, and the hydrogel swelling rate was 17.20%. The freeze-thaw experiment showed that the performance of the hydrogel was significantly improved while freezing at −80 ℃ and thawing at 4 ℃, and the best effect of one freeze-thaw cycle was achieved: The hardness increased from 125.3 g to 189.6 g, the elasticity increased from 0.72 to 0.85, and the storage modulus increased from 2100 Pa to 3500 Pa. There was a minimal decrease in performance after the second cycle. Nuclear magnetic resonance analysis showed that the hydrogel was more water-bound and more stable in structure under these conditions, and Fourier transform infrared spectroscopy confirmed that the hydrogel was physically cross-linked. The dual-network hydrogels prepared in this study had excellent mechanical properties and freeze-thaw stability, which would provide an important theoretical basis and practical reference for their application in frozen food preservation and as biomedical carriers.
190
85
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
