Ultrasonics Sonochemistry ( IF 8.4 ) Pub Date : 2018-09-01 , DOI: 10.1016/j.ultsonch.2018.09.001 Qing-Yu Yang , Xuan-Xuan Lu , Yong-Zhi Chen , Zhi-Gang Luo , Zhi-Gang Xiao
As a simple and effective physical method, ultrasound irradiation has been used to modify starch. Native waxy corn starch was treated by ultrasound irradiation at 100 and 400 W in this study. Compared with native waxy corn starch, lower proportion of B1, B2, and B3, higher proportion of A chain were observed in ultrasonicated waxy corn starch. 1H NMR combined with HPSEC-MALLS-RI data showed that lower degree of branching was observed in ultrasonicated waxy corn starch, and α-1,4 glycosidic linkages were more stable than α-1,6 glycosidic linkages in waxy corn starches. 13C NMR data indicated that the content of double helices was decreased, and single helix and amorphous components were increased after ultrasound irradiation. The A-type crystal structure was scarcely affected according to X-ray diffraction (XRD) analysis. The granule surface of ultrasonicated waxy corn starch became notch and rough fragment, and lower particle diameter was observed in ultrasonicated waxy corn starch. These results demonstrated that ultrasound irradiation affected chain length distribution, double helices, single helices and amorphous state, especially α-1,4 glycosidic linkages and α-1,6 glycosidic linkages, of waxy corn starch.
中文翻译:
超声辐照处理糯玉米淀粉的精细结构,晶体和理化性质
作为一种简单有效的物理方法,超声辐射已用于修饰淀粉。在本研究中,天然蜡质玉米淀粉通过在100和400 W的超声辐射下进行处理。与天然蜡质玉米淀粉相比,超声蜡质玉米淀粉中B 1,B 2和B 3的比例较低,而A链的比例较高。1 H NMR结合HPSEC-MALLS-RI数据显示,超声处理蜡质玉米淀粉中观察到较低的支化度,并且蜡质玉米淀粉中α-1,4糖苷键比α-1,6糖苷键更稳定。1313 C NMR数据表明,超声辐照后双螺旋的含量降低,单螺旋和无定形组分增加。根据X射线衍射(XRD)分析,几乎不影响A型晶体结构。超声处理的蜡质玉米淀粉的颗粒表面变为缺口和粗糙的碎片,并且在超声处理的蜡质玉米淀粉中观察到较低的粒径。这些结果表明,超声辐射影响蜡质玉米淀粉的链长分布,双螺旋,单螺旋和无定形状态,尤其是α-1,4糖苷键和α-1,6糖苷键。