Department of Chemistry, Surface and Corrosion Science, The Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
Adv Colloid Interface Sci. 2010 Mar 25;155(1-2):50-7. doi: 10.1016/j.cis.2010.01.004. Epub 2010 Jan 18.
Solution and adsorption properties of both charged and uncharged bottle-brush polymers have been investigated. The solution conformation and interactions in solution have been investigated by small-angle scattering techniques. The association of the bottle-brush polymers with anionic surfactants has also been studied. Surfactant binding isotherm measurements, NMR, surface tension measurements, as well as SAXS, SANS and light scattering techniques were utilized for understanding the association behaviour in bulk solutions. The adsorption of the bottle-brush polymers onto oppositely charged surfaces has been explored using a battery of techniques, including reflectometry, ellipsometry, quartz crystal microbalance, and neutron reflectivity. The combination of these techniques allowed determination of adsorbed mass, layer thickness, water content, and structural changes occurring during layer formation. The adsorption onto mica was found to be very different to that on silica, and an explanation for this was sought by employing a lattice mean-field theory. The model was able to reproduce a number of salient experimental features characterizing the adsorption of the bottle-brush polymers over a wide range of compositions, spanning from uncharged bottle-brushes to linear polyelectrolytes. This allowed us to shed light on the importance of electrostatic surface properties and non-electrostatic surface-polymer affinity for the adsorption. The interactions between bottle-brush polymers and anionic surfactants in adsorbed layers have also been elucidated using ellipsometry, neutron reflectivity and surface force measurements.
已经研究了带电和不带电的瓶刷聚合物的溶液和吸附性能。通过小角散射技术研究了溶液中的构象和相互作用。还研究了瓶刷聚合物与阴离子表面活性剂的缔合。利用表面张力测量、NMR、表面张力测量以及小角 X 射线散射（SAXS）、小角中子散射（SANS）和光散射技术，研究了在本体溶液中的缔合行为。使用一系列技术，包括反射计、椭圆偏振仪、石英晶体微天平以及中子反射率，探索了瓶刷聚合物在带相反电荷的表面上的吸附。这些技术的组合允许确定吸附质量、层厚度、含水量以及在层形成过程中发生的结构变化。发现瓶刷聚合物在云母上的吸附与在二氧化硅上的吸附非常不同，通过采用格子平均场理论来寻找这种差异的解释。该模型能够再现许多突出的实验特征，这些特征描述了在很宽的组成范围内，从不带电的瓶刷到线性聚电解质的吸附。这使我们能够阐明静电表面特性和非静电表面-聚合物对吸附的亲和力的重要性。还使用椭圆偏振仪、中子反射率和表面力测量来阐明吸附层中瓶刷聚合物与阴离子表面活性剂之间的相互作用。
