不同形态芡实产品的吸湿特性及其数学模拟分析

Moisture absorption properties and mathematical modeling analysis of different shape gorgon nut(Euryale ferox Salisb.) products

研究了不同形态芡实产品在不同相对湿度下的吸湿特性。吸湿率结果表明,干燥芡实产品具有很强的吸湿性。在相对湿度90%的环境中,经30d,带壳芡实、整芡仁、碎芡仁和芡实粉的含水率分别从吸湿前的10.20%、4.83%、3.93%和0.99%增加到19.78%、20.80%、20.66%和21.27%。对芡实产品吸湿率数据进行一元非线性回归,建立了2个吸湿率数学模型,分别为:幂函数模型W=a.tb,负指数函数模型W=aExp(b/t)。得到了不同芡实产品在不同相对湿度下的吸湿率模型参数,所得吸湿率数学模型均具有较理想的拟合效果。其中,负指数函数模型结构简单且拟合准确度较高,可用于不同芡实产品在不同湿度环境中的吸湿率预测。

The hygroscopicity of different gorgon nut products at different relative humidity conditions was investigated.The results indicated that dehydrated gorgon nut products possessed strong hygroscopicity.Stored in 90% relative humidity condition for 30 days,the moisture contents of shelled gorgon nut,whole gorgon nut kernel,cracked gorgon nut kernel and gorgon nut flour were significantly increased to 19.78%,20.80%,20.66% and 21.27% from initial 10.20%,4.83%,3.93% and 0.99%,respectively.Three models of hygroscopicity was set up by unitary nonlinear regression method based on the moisture absorption data of different gorgon nut products,that were power function W=a·tb and negative exponent function W=a Exp（b/t）.The hygroscopicity model parameters of different gorgon nut products in different relative humidity conditions were obtained.These models all possessed ideal fitting effects,especially,the negative exponent function was simple and more accuracy to fitting,and could be applied to predict the moisture absorption properties of different gorgon nut products in different humidity conditions.