摘要
以菠萝蜜种子为原料提取淀粉,利用双螺杆挤压机通过控制挤压操作参数对淀粉进行改性,并对挤出物进行分子量分布和链长分布实验。结果表明:挤压改性后的菠萝蜜种子淀粉对比原淀粉重均分子量和数均分子量均降低,平均回旋半径减少,链长分布中A链和B1链的比例变大,B2链和B3+链比例变小;随着机筒温度和螺杆转速的增加,重均分子量和数均分子量显著降低,A链比例显著增加,B1、B2和B3+链比例显著减少,表明挤压改性菠萝蜜种子淀粉精细结构受挤压操作参数影响显著。
Starch is extracted from Artocarpus heterophyllus seeds. Starch is modified by twin-rotor screw extruder through controlling the extrusion operation parameters.The molecular weight distribution and chain length distribution of the extrudate are tested.The results show that the weight-average molecular weight and number-average molecular weight of the extruded Artocarpus heterophyllus seed starch decrease compared with the original starch, the average cyclotron radius decreases, the proportion of A chain and B1 chain increases, the proportion of B2 chain and B3+ chain decreases, the weight-average molecular weight and number-average molecular weight decrease significantly with the increase of barrel temperature and screw rotating speed, the proportion of A chain increases significantly, and the ratio of B1, B2 and B3+ chain increases. The proportion of starch in extruded Artocarpus heterophyllus seed decreases significantly, which indicates that the fine structure of starch in extruded Artocarpus heterophyllus seed is significantly affected by extrusion operation parameters.
作者
李博
谭乐和
张彦军
王雪飞
LI Bo;TAN Yue-he;ZHANG Yan-jun;WANG Xue-fei(Spice and Beverage Research Institute of CATAS, Wanning 571533, China;Collegeof Food Engineering, East University of Heilongjiang, Harbin150066, China)
出处
《中国调味品》
CAS
北大核心
2019年第5期130-134,139,共6页
China Condiment
基金
国家自然科学基金项目(31671816)
海南省自然科学基金创新研究团队项目(2017CXTD018)
关键词
菠萝蜜种子淀粉
挤压改性
双螺杆挤压机
分子量
链长分布
Artocarpus heterophyllus seed starch
extrusion modification
twin-rotor screwextruder
molecular weight
chain length distribution
