Morphology and Thermal Characteristics of Polysaccharide Extracted by Ultrasound from <i>Ophiopogon japonicas</i>
- 1 Faculty of Science, Xi’an Aeronautical University, Xi’an, China
- 2 School of Materials Engineering, Xi’an Aeronautical University, Xi’an, China
- 3 School of Materials Engineering, Xi’an Aeronautical University, Xi’an, China
- 4 Faculty of Science, Xi’an Aeronautical University, Xi’an, China
- 5 Faculty of Science, Xi’an Aeronautical University, Xi’an, China
- 6 Faculty of Science, Xi’an Aeronautical University, Xi’an, China
Abstract
The crude polysaccharide UPOJ was extracted by ultrasound from <i> Ophiopogon japonicas </i> and purified by DEAE-cellulose52 column and Sephadex G-150 gel column. Purified polysaccharide UPOJ-DS was obtained. The thermal characteristics of UPOJ-DS were studied by using the thermal analysis system Q1000DSC LNCS FACS Q600SDT. The heating rate was 10 ° C/min and the test temperature was 20 ° C ~ 800 ° C. The results showed that there were three large mass losses in the process of heating, in which the maximum weight loss rate was 66.68% at 220 ° C ~ 330 ° C and the decomposition reaction took place in the polysaccharide itself, which indicated that the composition, water content, intermolecular interaction and aggregation behavior of UPOJ-DS were affected by temperature. The surface morphology of UPOJ-DS was observed by environmental scanning electron microscope (ESEM). The results indicated that the polysaccharide molecules were lamellar or clastic, with smooth surface, strong intermolecular interaction and close binding.
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