Penfold J, Tucker I, Thomas R K
ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, UK.
Langmuir. 2005 Dec 6;21(25):11757-64. doi: 10.1021/la052012+.
This paper describes how the cationic polyelectrolyte, polyDMDAAC (poly(dimethyl diallylammonium chloride)), is used to manipulate the adsorption of the anionic surfactant SDS and the mixed ionic/nonionic surfactant mixture of SDS (sodium dodecyl sulfate)/C(12)E(6) (monododecyl hexaethylene glycol) onto the surface of hydrophilic silica. The deposition of a thin robust polymer layer from a dilute polymer/surfactant solution promotes SDS adsorption and substantially modifies the adsorption of SDS/C(12)E(6) mixtures in favor of a surface relatively rich in SDS compared to the solution composition. Different deposition conditions for the polyDMDAAC layer are discussed. In particular, at higher solution polymer concentrations and in the presence of 1 M NaCl, a thicker polymer layer is deposited and the reversibility of the surfactant adsorption is significantly altered.
本文描述了阳离子聚电解质聚二甲基二烯丙基氯化铵（poly(dimethyl diallylammonium chloride)，简称polyDMDAAC）如何用于控制阴离子表面活性剂十二烷基硫酸钠（SDS）以及SDS与单十二烷基六乙二醇（C(12)E(6)）的离子/非离子混合表面活性剂在亲水性二氧化硅表面的吸附。从稀聚合物/表面活性剂溶液中沉积一层薄而坚固的聚合物层可促进SDS的吸附，并显著改变SDS/C(12)E(6)混合物的吸附情况，使表面相比溶液组成更富含SDS。文中讨论了聚二甲基二烯丙基氯化铵层的不同沉积条件。特别是，在较高的溶液聚合物浓度下以及存在1 M氯化钠的情况下，会沉积更厚的聚合物层，且表面活性剂吸附的可逆性会显著改变。
