Cross-linking of partially hydrolyzed sesbania gum, property and characterization

• Published in: International journal of biological macromolecules 2020-09, Vol.159, p.11-17
• Main Authors: Yanping, Li, Hongbo, Tang, Qiumei, He, Xiaoyang, Duan
• Format: Article
• Language: English
• Subjects: Acid hydrolysis; Acids - chemistry; Cross-linking; Cross-Linking Reagents - chemistry; Freezing; Hot Temperature; Hydrolysis; Plant Gums - chemistry; Property; Sesbania - chemistry; Sesbania gum
• ISSN: 0141-8130; 1879-0003
• DOI: 10.1016/j.ijbiomac.2020.04.164

Sesbania gum (SG) was subjected to chemical modification via the first acidolysis followed by cross-linking under maintaining the basic framework of SG particles so that its performances could be well tailored. The modification of SG was preferred for food processing and drug sustained-release agent uses. The experimental results indicated that the size distribution of SG particles was slightly narrowed by the acidolysis, while the size distribution was apparently broadened by cross-linking. More interestingly, the acidolysis evidently enhanced the intensity of hydrolysate at diffraction angle of 14.5°. The cross-linking was able to improve the freeze-thaw stability, acid and alkali resistance of SG, while the acidolysis only improved the acid resistance. As a traditional role, the cross-linking could lead to the reduction in the swelling capacity of SG. The acidolysis and cross-linking raised the thermal stability of SG. The flattened peak of hydroxyl groups confirmed that the cross-linking groups were successfully introduced into the molecular chains of SG according to FTIR. The addition of SG, PHSG, CLSG and CLPHSG as additives could effectively influence the pasting behavior of potato starch. •Acidolysis could specially strengthen the diffraction peak of hydrolysate at diffraction angle of 14.5°.•Cross-linking was able to obviously broaden the particle size distribution of SG.•High cross-linking made the absorption peak of hydroxyl groups in FTIR to be flattened.•Acidolysis and cross-linking raised the thermal stability of SG.