@article{Luo2026, 
author = {Shan Luo and Bo Qi and Xiaoshan Long and Shengjun Chen and Xiao Hu and Yongqiang Zhao and Jianchao Deng and Chunsheng Li and Shaoling Yang},
title = {Preparation and characterization of ultrasound-modified κ-Carrageenan/sodium alginate hydrogels},
year = {2026},
journal = {South China Fisheries Science},
volume = {22},
number = {3},
pages = {179-187},
keywords = {Kappa-Carrageenan, Ultrasound modification, Sodium alginate, Hydrogel},
url = {https://www.sciopen.com/article/10.12131/20250231},
doi = {10.12131/20250231},
abstract = {To prepare high-performance Kappa-Carrageenan (KC)-based hydrogels, we employed ultrasonic treatment to modify KC to prepare ultrasonic modified Kappa-Carrageenan (UM-KC). Then we blended UM-KC with sodium alginate (SA) at different mass ratios, and prepared UM-KC/SA composite hydrogels by two-step crosslinking method with CaCO3 and CaCl2. Besides, we determined the effects of different UM-KC/SA ratio and crosslinking degrees on the water content, swelling ratio, mechanical properties (Tensile strength, elongation at break), infrared spectra, and microstructure of the hydrogel. The results demonstrate that ultrasonic treatment significantly improved the solubility of KC (p<0.05). When the mas ratio of UM-KC to SA was 1∶2, the comprehensive performance of the hydrogel after secondary crosslinking was optimal. The composite hydrogel exhibited a water content of 93.26%, a swelling ratio of 0.45%, an elongation at break of 182.00%, and a tensile strength of 0.203 7 MPa. Infrared spectroscopy reveals enhanced rigidity in the composite hydrogels, while scanning electron microscopy (SEM) show that the hydrogel had a honeycomb-like porous structure. Therefore, the compounding of UM-KC and SA can prepare composite hydrogels with excellent properties, which offers new ideas and methods for the development of novel algal polysaccharide-based medical hydrogel dressings.}
}