加酸挤压膨化玉米粉工艺条件及对其品质影响研究

以玉米为原料,酸为处理试剂,采用挤压膨化的方法,研究了酸剂、物料含水量、酸液浓度、膨化温度、螺杆转速对挤压膨化玉米粉还原糖含量的影响。确定了加酸挤压膨化玉米粉的工艺参数为:HCl为处理试剂、物料含水量27%、酸液浓度0.027mol/L、膨化温度145℃、螺杆转速250r?min。在该工艺条件下膨化与未加酸相比,还原糖、水溶性成分含量分别提高51.4%、23.5%,α-化度提高14.8%,粗纤维下降88.12%。

Study on the Process and Its Quality of Maize Extrusion Products by Acid Aid

Use maize without germ as raw material and acid as a disposal reagent, the effect of reducing sugar content on acid reagent, moisture of material, acid density, extrusion temperature and speed of screw were studied . The optimal parameters was obtained as follows: hydrochloric acid as disposal reagent, moisture of material 27%, acid density 0.027 mol/L, extrusion temperature 145℃, speed of screw 250 r∕min. These process parameters increased reducing sugar, water soluble content by 51.4% and 23.5%, gelatizization degree by 14.8%, reduced crude fiber content by 88.12%.