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一、毛发的感湿特性1783年,世界上第一台毛发湿度计由瑞士人HB.Saussure制造,其基本原理是毛发孔隙吸附水蒸气而引起毛发长度的变化,毛发孔隙及其孔隙表面对水蒸气分子的吸附情况决定其特性好坏。人的毛发经脱脂处理后,表面贯穿着许多微孔,这些微孔吸附了周围环境中的水蒸气,在微孔中形成弯月面并产生表面张力。当空气中的水汽达到饱和时,弯月面表面张力达到最大,毛发伸长到最大位置;随着空气中水蒸气的蒸发,相对湿度降低,一部分水从毛孔中蒸发,毛孔中的弯月面变成凹形,表面张力纵向分力减少,毛发就收缩。空气湿度的变化引起微孔弹性壁的形变,
First, the feeling of hair wet properties In 1783, the world’s first hair hygrometer manufactured by the Swiss HB.Saussure, the basic principle is the hair pore adsorption of water vapor caused by changes in the length of the hair, hair pore and pore surface of the water The adsorption of vapor molecules determines their properties. Human hair after degreasing treatment, the surface penetrates many pores, these pores adsorbed the water vapor in the surrounding environment, the formation of meniscus in the pores and the surface tension. When the water vapor in the air reaches saturation, the meniscus reaches the maximum surface tension and the hair grows to the maximum position. As the water vapor in the air evaporates, the relative humidity decreases, a portion of the water evaporates from the pores, the meniscus in the pores Into a concave, surface tension component to reduce vertical, hair contraction. The change of air humidity causes the deformation of the microporous elastic wall,