高温水分散体系交联玉米淀粉的非晶化现象研究

Study on the Noncrystallization of Cross-Linked Corn Starches in Water Separating System with High Temperature

研究了用三偏磷酸钠为交联剂制备高交联玉米淀粉的方法,采用偏光显微镜和广角X-射线衍射对交联玉米淀粉由多晶态向非晶态的渐变过程进行了详细报道,发现了随着温度的升高交联玉米淀粉逐渐非晶化现象,提出在高温条件下交联玉米淀粉存在着只含无定型结构的非晶颗粒态,并用扫描电镜对非晶颗粒态玉米淀粉的结构进行了详细研究.

With sodium trimetaphosphate as crosslinking agent , the highly crosslinked corn starches was prepared. Using the polarized light microscope and Xray analytical method, the process gradually changing from polycrystallization to noncrystallization was investigated in details. Noncrystallization of crosslinked corn starches was found with increasing of temperature. The polarization microscopy and Xray diffraction data suggested that crosslinking corn in form of the noncrystallized granules state only, existed at high temperature. A furthermore study on the structure characteristics of corn starch in forma of noncrystallized granule state was conducted by using USE.