【摘要】 <正> 木材中吸附水的介电弛豫过程与水分子回转取向时,切断同木材吸附点之间形成的氢键结合数及参与回转取向的水分子数密切相关。木材-吸附水系不是单一介电弛豫时间而是具有多重介电弛豫时间的系统,即木材-吸附水系的介电弛豫时间具有某种分布。一般,依据介电弛豫时间分布形式,可以考察系统的介电弛豫机构即分子运动形式。本文应用Fouss-Kirkwood、Ferry关于弛豫时间分布的理论,求出了木材-吸附水系的介电弛豫时间谱,并讨论了Fouss-Kirkwood理论中的弛豫参数α同含水率之间的关系,最后还触及了木材-吸附水系的介电弛豫时间分布的机构。更多还原

【Abstract】 The wood adsorptive water is a multi-dielectric relaxation time system.The relationship detween the chart of dielectric relaxation time and the amount of adsorptive water was established according to the theorires of Fouss-Kirkwood and Ferry in the arricle. The distribution mechanism of dielectricrelaxation time of the wood-adsorptive water was discussed. The distribution of dielectric relaxation time of wood-adsorptive waterwere consisted with the theories of Fouss-Kirkwood and Ferry. The distributionof dielectric relaxation time moved to the short time domain as the amountof adsorptive water increased. By applying Fouss-Kirkwood’s theory it wasfound that the distribution parameter a of distribution relaxation time wasproportional to the moisture content φ, i. e. : α=（8.33φ+1.94）·10^-1 φ≤27.2%更多还原