| 循环湿热处理对海藻酸钠-普通玉米淀粉复合体系流变和老化性质的影响 |
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| 引用本文： | 尚梦珊,陈海华,王雨生,石蕊.循环湿热处理对海藻酸钠-普通玉米淀粉复合体系流变和老化性质的影响[J].青岛农业大学学报,2016(4):282-289. |
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| 作者姓名： | 尚梦珊 陈海华 王雨生 石蕊 |
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| 作者单位： | 青岛农业大学食品科学与工程学院,山东 青岛,266109 |
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| 基金项目： | 山东省高等学校中青年骨干教师国际合作培养项目(SD-20130825) |
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| 摘 要： | 分别以普通玉米淀粉和海藻酸钠-普通玉米淀粉为研究对象,采用动态流变仪、差示扫描量热仪和红外光谱分析仪等,探讨了3种不同循环湿热处理方式对普通玉米淀粉(Normal Corn Starch,NCS)和海藻酸钠-普通玉米淀粉(Sodium Alginate-Normal Corn Starch,AG-NCS)流变性质、老化性质及结构的影响.结果表明,3种循环湿热处理均有利于AG-NCS黏弹性凝胶的形成,表现为tanδ减小.经过3种循环湿热处理,AG-NCS的增稠性减弱,表现为稠度系数k减小.老化性质表明,3种循环湿热处理能够抑制AG-NCS的短期回生,而只有经过25 ℃和4 ℃放置后再次进行湿热处理能够抑制AG-NCS的长期回生.经过3种循环湿热处理,AG-NCS中的结晶结构增加,表现在1047/1022 cm-1的比值增大;AG-NCS分子内、分子间水合羟基数增多,表现为AG-NCS的O-H伸缩振动峰、O-H弯曲振动峰波数降低.
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| 关 键 词： | 循环湿热处理 海藻酸钠-普通玉米淀粉(AG-NCS) 老化性质 流变性质 |
Effect of Single and Dual Heating-moisture Treatment on the Rheological and Retrogradation Properties of Sodium Alginate-Normal Corn Starch Complexes |
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| Abstract: | The effect of single and dual heating-moisture treatment (SHMT and DHMT) on the properties of sodium alginate-normal corn starch (AG-NCS) was been investigated,retrogradation,rheological properties and structure of AG-NCS were measured by differential scanning calorimeter,dynamic rheometer and Fourier-transform infrared spectroscopy.The results showed that viscoelastic gel of AG-NCS can be formed by SHMT and DHMT,for the decreasing tanδ.The thickening properties of AG-NCS by SHMT and DHMT receded for the Consistency coefficients (k) reducing.The retrogradation properties indicated that SHMT and DHMT hindered short-term retrogradation of AG-NCS,however only AG-NCS DHMT25 and AG-NCS DHMT4 had low long-term retrogradation ratio.The crystal structure of AG-NCS was influenced for the O-H stretching vibration and O-H bending vibration peak decreased. |
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| Keywords: | single and dual heat-moisture treatment sodium alginate-normal corn starch (AG-NCS) retrogradation rheological properties |
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