高直链玉米淀粉颗粒的形貌与结构  

The Granule Morphology and Structure of HighAmylose Maize Starch

作　　者：陈培荣[1,2] 朱苏文[1] 杜先锋[3] 谈应权[1] 程备久[1] 

机构地区：[1]安徽农业大学生物质材料与能源安徽省教育厅重点实验室 [2]安徽农业大学理学院 [3]安徽农业大学茶与食品科技学院,安徽合肥230036

出　　处：《高分子材料科学与工程》2009年第12期100-102,106,共4页Polymer Materials Science & Engineering

基　　金：国家863计划资助项目(2006AA10Z1B4);安徽省科技厅重点科研项目(07020303034)

摘　　要：采用偏光显微镜、扫描电子显微镜、激光粒度分布分析仪和X射线衍射仪研究高直链玉米淀粉的颗粒形貌与结构。结果表明,高直链玉米淀粉具有十字偏光现象;颗粒形态圆滑、形状多样,大多为近似椭圆形、少数呈细长条等特殊形和无规则形,大多数颗粒表面有多个乳状突起,少数颗粒表面有孔洞或裂口,极少数颗粒表面的局部有裂纹,颗粒为"实心";颗粒粒径为3.5μm^30.0μm,平均粒径为10.2μm;颗粒晶型结构为B型,结晶度为21%。高直链玉米淀粉的颗粒形貌、晶型结构不同于普通玉米淀粉。High-amylose maize starch with amylose content 53% was investigated at the starch granule morphology and structure.The results show that the granules have Maltese cross.The granules are polymorphic,but tend to have a relatively round and smooth appearance.Most granules shapes are undefined oval,a few of granules shapes are specific such as elongated rod-like,while some granules exhibit their shapes irregularly.There exit several papillary protrusions on the most granules surface,some holes on a few of granules and some fractures too.Each individual granule is solid.The granules are with a narrow size ranging from 3.5 μm to 30 μm in diameter,average size 10.2 μm.High-amylose starch displays B-type pattern,its crystallinity is 21%.The granule morphology and structure of high-amylose maize starch are different from those of normal maize starch.

关 键 词：高直链玉米淀粉 颗粒形貌 晶型结构 

分 类 号：TS201.1[轻工技术与工程—食品科学]