摘要
为提高微孔糯玉米淀粉的吸油率,改善其应用品质,采用湿法对微孔糯玉米淀粉进行疏水改性。研究了反应温度、反应时间、pH值、疏水剂用量对疏水微孔糯玉米淀粉吸油率的影响,用红外光谱仪、热重分析仪、差示扫描量热仪分别对疏水微孔糯玉米淀粉的结构与热特性进行了表征与测试。结果表明,微孔糯玉米淀粉经疏水改性后,其吸油率增加43.0%。制备疏水微孔糯玉米淀粉的优化工艺条件为:反应温度50℃,反应时间4h,pH值9.0。微孔糯玉米淀粉经疏水改性后,其差示扫描量热曲线的峰起始温度、峰值温度、峰结束温度及变焓减小,热稳定性降低。研究结果可为微孔糯玉米淀粉工业应用提供参考。
The hydrophobic modification of micro-porous waxy com starch was carried out to enhance its oil absorption rate and improve its application quality by using the wet method. Some factors affecting the oil absorption rate of hydrophobic micro-porous waxy corn starch were： reaction temperature, reaction time, pH value and amount of hydrophobic agent. The microstructure and thermal property were characterized and measured by infrared spectrogram, thermogravimetric analyzer and differential scanning calorimetry, respectively. The results indicated that the oil absorption rate of hydrophobic micro-porous waxy corn starch increased by 43.0%, compared with that of micro-porous waxy corn starch. The optimum process conditions for preparing hydrophobic micro-porous waxy corn starch were as follows： reaction temperature 50℃, reaction time 4 h, pH value 9.0. The peak onset temperature, peak temperature, peak end temperature, enthalpy change of DSC curve of hydrophobic micro-porous waxy com starch decreased, and the thermal stability of hydrophobic micro-porous waxy corn starch decreased, compared with those of micro-porous waxy com starch. The research results can provide a reference for the commercial applications of the micro-porous waxy corn starch
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2012年第15期270-275,共6页
Transactions of the Chinese Society of Agricultural Engineering
关键词
淀粉
疏水性
优化
六甲基二硅氮烷
改性
starch, hydrophobicity, optimization, hexamethyl disilazane, modification
