摘要
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。
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 ℃,resulting in an SDF yield in final products of 10.75%,which is in basic agreement with the predicted value of 11.01%.Thus,the optimal process is reliable.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2011年第18期6-10,共5页
Food Science
基金
国家"863"计划项目(2011AA100805)
关键词
响应面法
玉米皮纤维
双螺杆挤出工艺
response surface methodology
corn spermoderm fiber
twin-screw extrusion
