酶转化淀粉熬胶工艺的优化

利用α-淀粉酶对玉米原淀粉进行改性,研究了酶转化淀粉熬胶的工艺条件。通过实验确定了酶转化淀粉熬胶的最佳工艺条件为：α-淀粉酶用量为0.1×10-3,酶转化淀粉熬胶糊化温度为75℃,杀菌温度为98℃,加料顺序采用先α-淀粉酶后淀粉、间隔搅拌时间为2 min。在此工艺条件下生产定量为78 g/m2轻型纸,纸表面强度平均提高了75%,平滑度平均提高了16%,Cobb值由平均35 g/m2降低到平均28 g/m2,降低了20%。

Optimization of Enzyme Converted Starch Cooking Process

Alpha amylase was used to modify native maize starch in this paper.Also optimum process conditions for enzyme converted starch cooking were determined through experiments,which were as follows: alpha amylase dosage,0.01%;enzyme converted starch cooking gelatinization temperature,75 ℃;sterilization temperature,98 ℃;sequence of feeding,alpha amylase first,and starch second,with interval mixing of 2 min.Under optimum process conditions light weight paper was produced with base weight of 78 g/m2,for which surface strength was improved by 75% averagely,and smoothness by 16% while Cobb value was reduced by 20%,from average value of 35 g/m2 to 28 g/m2.