Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 23, Issue 16, Pages -Publisher
MDPI
DOI: 10.3390/ijms23169383
Keywords
salecan; soy protein isolate; composite hydrogel; mechanical properties; rheological properties
Funding
- Natural Science Foundation of Shandong Province [ZR2019BC053]
- National Natural Science Foundation of China [32102129]
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, Jiangnan University [1022050205219730/008]
- Young Scholars Program of Shandong University, Weihai [202208]
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In this study, a Sal-SPI composite hydrogel was fabricated using Salecan (Sal) and soy protein isolate (SPI), and the effect of Sal concentration on the properties and microstructure of the hydrogel was evaluated. The research showed that increasing Sal concentration improved the elasticity and internal network structure of the hydrogel, indicating a green and simple method for fabrication.
Salecan (Sal) is a novel marine microbial polysaccharide. In the present research, Sal and soy protein isolate (SPI) were adopted to fabricate Sal-SPI composite hydrogel based on a stepwise process (thermal treatment and transglutaminase induction). The effect of Sal concentration on morphology, texture properties, and the microstructure of the hydrogel was evaluated. As Sal concentration varied from 0.4 to 0.6 wt%, hydrogel elasticity increased from 0.49 to 0.85 mm. Furthermore, the internal network structure of Sal-SPI composite hydrogel also became denser and more uniform as Sal concentration increased. Rheological studies showed that Sal-SPI elastic hydrogel formed under the gelation process. Additionally, FTIR and XRD results demonstrated that hydrogen bonds formed between Sal and SPI molecules, inferring the formation of the interpenetrating network structure. This research supplied a green and simple method to fabricate Sal-SPI double network hydrogels.
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