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| 葡萄糖糖基化改性玉米醇溶蛋白膜的物化性质
及在胶囊壳中的应用 |
| Physicochemical property of glucose glycosylated zein film and its application in capsule shells |
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| DOI： |
| 中文关键词: 玉米醇溶蛋白 糖基化改性 葡萄糖 物化性质 |
| 英文关键词:zein glycosylation glucose physicochemical property |
| 基金项目:黑龙江省教育厅基本业务专项“粮头食尾”项目（LTSW201701）；黑龙江省省属高等学校基本科研业务费科研项目（植物性食品加工技术特色学科专项）（YSTSXK 201825）；黑龙江省教育厅基本科研业务费科研项目-校地合作项目（135309214） |
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| 中文摘要: |
| 以葡萄糖为原料对玉米醇溶蛋白进行糖基化改性，以抗拉强度为指标，考察最佳改性成膜工艺，并通过差示扫描量热法（DSC）、傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）对改性蛋白膜的物化性质进行研究。结果表明：在葡萄糖与玉米醇溶蛋白质量比1∶ 10、超声功率450 W、反应时间30 min的条件下，制得玉米醇溶蛋白-葡萄糖膜的抗拉强度达到34.06 MPa，接枝度为6305%。玉米醇溶蛋白以共价键的方式与葡萄糖结合，使糖基化改性产物结构更加稳定。改性蛋白膜的表面较改性前更加平整，凹陷凸起基本消失。玉米醇溶蛋白-葡萄糖膜热变性温度从改性前的157.95 ℃升高到164.26 ℃，膜的热稳定性提高。经葡萄糖糖基化改性后的玉米醇溶蛋白胶囊壳指标符合《中华人民共和国药典》（2015版）要求。 |
| 英文摘要: |
| The zein was glycosylated by glucose and the film forming process was optimized with tensile strength as indicator.Zein film and zein-glucose film were characterized by SEM，FT-IR and DSC.The results showed that the optimal preparation conditions of glucose glycosylated zein film were obtained as follows: mass ratio of glucose to zein 1∶ 10, ultrasonic power 450 W and reaction time 30 min.Under these conditions, the tensile strength of zein-glucose film was 34.06 MPa, and the degree of graft was 63.05%.Zein was grafted with glucose by covalent bonds, and the structure of the product was more stable.Zein-glucose film was more smoothly compared with zein film and the sags and bulges almost disappeared. The thermal denaturation temperature of zein-glucose film increased from 157.95 ℃ before glucose glycosylation to 16426 ℃, and the thermal stability of film was improved.The basic indicators of the zein-glucose capsules met the requirements of Pharmacopoeia of the Peoples Republic of China (2015 edition). |
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