挤压制备的花生壳颗粒的性质研究

Properties of Peanut Hull Pellets Prepared by Extruding

应用挤压制粒技术制备花生壳颗粒,其容积密度是未经挤压花生壳的4.44倍。花生壳颗粒暴露在相对湿度为60%和80%的空气中时吸收水分,在相对湿度为50%的空气中时失去水分。花生壳颗粒在25℃的水分吸附等温线为S形曲线,花生壳颗粒含水量高于13.7%w.b.时不易贮存。挤压操作不但没有破坏花生壳中的功能成分,还能提高可溶性膳食纤维的含量。

Peanut hull pellets were prepared by extruding, and its bulk density was increased 4.44 times than peanut hull. Peanut hull pellets absorbed moisture when exposed to air conditioned to relative humidity of 60 v/v aiad 80 %, and lost moisture when the relative humidity of the air was 50 %. The plot of the moisture sorption data for peanut hull pellets at 25 ~C was sigmoid in shape. While moisture content for peanut hull pellets 13.7 % w.b. and above allows for mildew growth. Yield of water soluble dietary fiber of peanut hull pellets was raised by extruding.