Rheological Behavior and Microstructures in the Hybrid Gel of Scallop (Patinopecten yessoensis) Male Gonad Hydrolysates Modified by κ-Carrageenan and Methyl-β-Cyclodextrin

The gelation and microstructural properties of the hybrid gel constructed by scallop (Patinopecten yessoensis) male gonad hydrolysates (SMGHs), kappa-carrageenan (kappa-C), and methyl-beta-cyclodextrin (M-beta-CD) were determined by utilizing rheometer, low-field nuclear magnetic resonance (LF-NMR), Fourier transform infrared spectroscopy (FTIR), as well as cryo-scanning electron microscopy (cryo-SEM). The rheological results of SMGHs/kappa-C were improved by the addition of M-beta-CD. The stronger synergistic effects between SMGHs and saccharides were also evidenced by the red shift in hydrogen bonds and blue shift in ester sulfate bonds of SMGHs/kappa-C/M-beta-CD and kappa-C/M-beta-CD. These situations jointly promoted the formation of a denser microstructure by cryo-SEM. SMGHs/kappa-C/M-beta-CD complex could promise a new strategy to develop functional hydrogels.