摘要
采用电导法研究了366K（93℃）时经洁净处理的羊毛纤维在酸性（PH=3．0～3．5）水溶液中对十二烷基磺酸钠（SDS）的吸附等温线，以及羊毛在不同助剂（含乙二醇／苯甲醇和硫酸锌）的水溶液中对SDS的吸附等温线．结果表明，加入助剂后，SDS的吸附量均出现不同程度的下降．可解释为较高温度下，阴离子表面活性剂SDS在水中的溶解度升高．同时，苯甲醇、乙二醇分子中都含有羟基，亲水性较强，在水中的溶解度也较高，使得表面活性剂与水的亲和性增强，表面活性剂分子自水中逃离而吸附于羊毛上的趋势相对减少，故SDS的吸附量降低．由通用吸附等温线公式估算了不同助剂作用下SDS在羊毛／溶液界面吸附的表面胶团聚集数和表面胶团化标准自由能，与实验结果比较符合．本文还研究了在空白浴和加助剂（“DL”、“FL”）条件下分散染料上染羊毛的吸附等温线，并探讨了其吸附机理，从较深层次上探索其染色机理．
The adsorption isotherms of Sodium Dodecyl Sulfonate （SDS） onto wool fiber surface which experienced clean processing from an acid aqueous solution（pH3.0-3.5） by conductance method at 366K（93℃） were studied, so did the isotherms of wool adsorbing SDS from different aqueous solutions which containing various auxiliaries（containing glycol/benzalcohol and zinc sulfate）. Some results can be found that all the adsorbed amounts of SDS show a descending trend at different degrees after adding the auxiliaries. The increasing solubility of the agent indicates the affinity of surfactant with water becoming stronger, and the trend of surfactant fleeing away water and adsorbed onto the wool is relatively decrease, which made the adsorbed amounts of SDS reduce. The surface micelle aggregation number and the standard Gibbs free energy for surface micellization of SDS adsorbed onto the wool/solution interface in the actions of different auxiliaries were estimated by the general adsorption isotherm formula, and the values of them is generally coinciding with the experiment results. The adsorption isotherms of disperse dye adsorbed onto the wool under the conditions of with and no auxiliaries （＂DL＂ or ＂FL＂） were also studied. The adsorption and dyeing mechanism was also explored.
出处
《西安工程科技学院学报》
2007年第6期791-798,共8页
Journal of Xi an University of Engineering Science and Technology
基金
Foundation of Education Bureaum,Shaanxi Province(04JK182)
关键词
羊毛
十二烷基磺酸钠
吸附等温线
分散染料
wool
sodium dodecyl sulfonate
adsorption isotherms
disperse dyes
