响应面法优化玉米皮纤维双螺杆挤出工艺

采用响应面法对玉米皮纤维双螺杆挤出工艺进行优化。以脱脂玉米皮纤维为原料，在单因素试验基础上，以物料含水量(绝干物质基础)、挤出温度及玉米皮纤维粒度为响应因素、挤出后可溶性纤维得率为响应值，采用三因素三水平的响应面分析法，确定最佳挤出工艺。结果表明：物料含水量138%、挤出温度169℃、玉米皮粒度0.175mm(80目)时，可溶性纤维得率为10.75%，在此条件下，理论得率为11.01%，与实测值基本相符，说明此优化工艺条件可行。

Optimization of Twin-screw Extrusion of Corn Spermoderm Fiber by Response Surface Methodology

Soluble dietary fiber(SDF) was prepared by twin-screw extrusion of defatted corn spermoderm,and the extrusion conditions were optimized by response surface analysis.On the basis of one-factor-at-a-time experiments,the optimal extrusion conditions for maximizing SDF content in final products were determined by using a 3-variable,3-level Box-Behnken experimental design combined with response surface analysis as follows: material moisture content 138%,material granularity 0.175 mm and extrusion temperature 169...