食品科学 ›› 2011, Vol. 32 ›› Issue (18): 6-10.doi: 10.7506/spkx1002-6630-201118002

• 工艺技术 • 上一篇    下一篇

响应面法优化玉米皮纤维双螺杆挤出工艺

王大为,杜彩霞,周清涛,王 研   

  1. 吉林农业大学食品科学与工程学院
  • 出版日期:2011-09-25 发布日期:2011-09-24
  • 基金资助:
    国家“863”计划项目(2011AA100805)

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

WANG Da-wei,DU Cai-xia,ZHOU Qing-tao,WANG Yan   

  1. (College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China)
  • Online:2011-09-25 Published:2011-09-24

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。

关键词: 响应面法, 玉米皮纤维, 双螺杆挤出

Abstract: 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.

Key words: response surface methodology, corn spermoderm fiber, twin-screw extrusion

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