Chen Bingyan, Zeng Shaoxiao, Zeng Hongliang, Guo Zebin, Zhang Yi, Zheng Baodong
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Food Chem. 2017 Jul 1;226:119-127. doi: 10.1016/j.foodchem.2017.01.018. Epub 2017 Jan 5.
Starch-lipid complexes were prepared using lotus seed starch (LS) and glycerin monostearate (GMS) via a high pressure homogenization (HPH) process, and the effect of HPH on the physicochemical properties of LS-GMS complexes was investigated. The results of Fourier transform infrared spectroscopy and complex index analysis showed that LS-GMS complexes were formed at 40MPa by HPH and the complex index increased with the increase of homogenization pressure. Scanning electron microscopy displayed LS-GMS complexes present more nest-shape structure with increasing homogenization pressure. X-ray diffraction and differential scanning calorimetry results revealed that V-type crystalline polymorph was formed between LS and GMS, with higher homogenization pressure producing an increasingly stable complex. LS-GMS complex inhibited starch granules swelling, solubility and pasting development, which further reduced peak and breakdown viscosity. During storage, LS-GMS complexes prepared by 70-100MPa had higher Avrami exponent values and lower recrystallization rates compared with native starch, which suggested a lower retrogradation trendency.
采用高压均质(HPH)工艺,以莲子淀粉(LS)和单硬脂酸甘油酯(GMS)制备淀粉 - 脂质复合物,并研究了HPH对LS - GMS复合物理化性质的影响。傅里叶变换红外光谱和复合指数分析结果表明,在40MPa下通过HPH形成了LS - GMS复合物,且复合指数随均质压力的增加而增大。扫描电子显微镜显示,随着均质压力的增加,LS - GMS复合物呈现出更多的巢状结构。X射线衍射和差示扫描量热法结果表明,LS和GMS之间形成了V型结晶多晶型物,均质压力越高,形成的复合物越稳定。LS - GMS复合物抑制了淀粉颗粒的膨胀、溶解性和糊化过程,进一步降低了峰值粘度和崩解粘度。在储存过程中,与天然淀粉相比,由70 - 100MPa制备的LS - GMS复合物具有更高的阿弗拉米指数值和更低的重结晶速率,这表明其老化趋势较低。