油溶性污渍在棉织物表面的吸附

Adsorption Properties of Cotton Textile for Oil Stains

分析了油溶性污渍蓖麻油、磷脂、液体石蜡、羊毛脂对棉织物的吸附过程,进一步探讨其吸附等温线及吸附动力学。研究表明,用Freundlich等温式拟合吸附模型,相关系数都达到了0.98以上。在污渍质量浓度为200 mg/mL时达到了动态平衡吸附。在一定条件下,吸附量由大到小的顺序为:阿拉伯树胶,磷脂,蓖麻油,羊毛脂,液体石蜡。吸附过程均呈现准二级动力学特征,多糖类聚合物阿拉伯树胶吸附速率最慢,直链烷烃液体石蜡的吸附速率最快。经SEM表面形态观察,大部分污渍都进入到了纤维间空隙中和粘在纤维束表面。红外光谱分析表明,污渍和棉纤维之间有氢键作用。

The adsorption process of cotton textile for castor oil,lecithin,liquid paraffin and lanolin was investigated.The adsorption isotherms and adsorption kinetics were also studied.Results of batch experiments showed that the equilibriums were fitted with the Freundlich equations.The characteristic parameters for this model were determined.The dynamic equilibrium adsorption was reached when the concentrations of stains were 200 mg/mL.The descending order of adsorption capacity was Arabic gum,lecithin,castor oil,lanolin,liquid paraffin.Adsorption processes followed quasi-secondary reaction kinetics.Arabic gum,which was polysaccharide polymer,had the fastest absorption rate,liquid paraffin showed the slowest adsorption rate.The SEM surface morphology observation showed that much of stains entered the fiber gap and glued to the fiber bundle surface.Infrared spectral analysis showed that there were hydrogen bonding between Stains and fibers.