表面活性剂在卜特兰水泥表面上的吸附行为(英文)  

Adsorptive Behavior of Surfactants on Surface of Portland Cement

作　　者：商少明[1] 张同林[1] 殷福珊[1] A.Aishah A.Salmiah T.L.Ooi 

机构地区：[1]无锡轻工大学化学与材料工程学院 [2]马来西亚棕榈油研究院高等油化中心

出　　处：《日用化学品科学》2000年第S2期53-59,70,共8页Detergent & Cosmetics

摘　　要：实验探索了脂肪醇聚氧乙烯醚硫酸盐 (AES)、氯化十六烷基吡啶 (CPC)、β -萘磺酸聚合物 (NS)以及烷基酚聚氧乙烯醚 (TX -10 )等四种不同类型的表面活性剂在普通硅酸盐水泥表面的吸附行为。研究表明 ,AES在水泥颗粒表面的吸附是一种快吸附 ,属于LS型 ;CPC在水泥颗粒表面的吸附过程则是一种慢吸附 ,受动力学因素所控制 ;NS的吸附量与其浓度成线性关系 :TX -10则基本上不被吸附。结果显示 ,被吸附的三种表面活性剂都是疏水基朝向水相 ,增加了水泥颗粒的疏水性。然而AES随着添加量的增大 ,由于吸附胶束的形成 ,使水泥颗粒表面经由亲水 -疏水 -亲水的变化过程。从表面电荷的变化来看 ,AES、NS的添加均使水泥表面Zeta电位有所增加 ,而CPC却使得水泥颗粒表面从带负电变到带正电。WT5”BZ]:On the surface of Portland cement, four surfactants have different adsorptive behaviors: ethoxylated fatty alcohol sulfate(AES) belongs to LS type of adsorption; cetyl piridinium chloride(CPC) is kinetically controlled; condensates of naphthalene formaldehyde (NS) has a linear relationship of adsorbance vs. concentration; and ethoxylated alkyl phenol (TX-10) does not be adsorbed. All adsorbed surfactants have hydrocarbon chain toward liquid phase and increase hydrophobicity of cement surface. However, AES suffered a change of hydrophilic → hydrophobic → hydrophilic because of formation of adsorptive micelle. Both AES and NS only increase zeta-potential, but CPC changes zeta-potential from negative to positive. A modified stern double-layer model has been proposed to illustrate adsorptive characteristics of above surfactants.

关 键 词：表面活性剂 吸附 性能 

分 类 号：O647[理学—物理化学]