Novel green processing method for increasing resistant starch content through crosslinking of starch and chitosan

Abstract

The invention relates to crosslinking of starch and chitosan in specific circumstances, and especially a processing technology for increasing resistant starch content through crosslinking of starch and chitosan. Chitosan and waxy maize starch are subjected to spray drying in an acetic acid solution system to prepare a blend; then the blend in the anhydrous limit state is subjected to thermal crosslinking for 2 h; and the blend sample is analyzed and determined, and molecular structure of the sample is studied through infrared spectrometer and nuclear magnetic resonance mass spectrometer. The results show obvious difference between the molecular structure of the blends and that of a control, it instructs that chitosan and starch conduct certain cross-linking reaction rather than a simple physical blending, through drying thermal treatment, to generate a novel structure. At the same time, a scanning electron microscope is used to observe the particle morphology of the blend sample before and after the gelatinization. The blend sample is subjected to a digestion test in a simulated in vivo digestive system test to obtain the resistant starch.

Description

Technical field [0001] The patent of the invention relates to the cross-linking of starch and chitosan, especially the processing technology for increasing the content of resistant starch after waxy corn starch and chitosan are cross-linked. The invention is a research and development of a new green processing method for increasing the content of resistant starch, that is, the cross-linking of starch and chitosan is processed without chemical solvents to increase the content of resistant starch, which is a research of a new method. Background technique [0002] Glucose is released slowly during the digestion process of resistant starch, which has become a focus of attention of many experts. There are many preparation methods at home and abroad, mainly including microwave treatment, ultrasonic treatment, chemical treatment and hydrolysis and autoclaving. And these methods also have many deficiencies. For example, microwave treatment of samples will be affected by heating tem...

AI Technical Summary

Problems solved by technology

[0003] In addition, studies have shown that chitosan cannot be well digested and absorbed by the human body, but it has good antibacterial, biodegradable and film-forming properties. At present, most studies focus on the antibacterial film of starch and chitosan blends. However, the research on the preparation of starch granules by special dry heat treatment after mixing the two at the molecular level has not been reported yet.

Images