Notley Shannon M, Eriksson Malin, Wågberg Lars
Department of Fibre and Polymer Technology, KTH-Royal Institute of Technology, SE-10044 Stockholm, Sweden.
J Colloid Interface Sci. 2005 Dec 1;292(1):29-37. doi: 10.1016/j.jcis.2005.05.057. Epub 2005 Jun 22.
The build-up of multilayers constructed from polyallylamine hydrochloride (PAH) and polyacrylic acid (PAA) under different pH conditions was continuously monitored using the quartz crystal microbalance with dissipation. The adsorbed amount of polymer as well as the amount of coupled water was determined. Furthermore, from dissipation measurements, it was possible to determine the visco-elastic properties of the adsorbed multilayer. These properties were highly dependent on the polyelectrolyte present in the outermost layer. The multilayer was far more rigid and elastic with PAA as the outermost layer. Furthermore, a link has been established between the conformability or rigidity of a multilayer covered surface and the adhesion between such surfaces. Adhesion measurements using the atomic force microscope showed a greater pull-off force when the more viscous PAH was present in the outermost layer.
使用带耗散监测的石英晶体微天平连续监测在不同pH条件下由聚烯丙胺盐酸盐（PAH）和聚丙烯酸（PAA）构建的多层膜的形成。测定了聚合物的吸附量以及结合水的量。此外，通过耗散测量，可以确定吸附多层膜的粘弹性性质。这些性质高度依赖于最外层存在的聚电解质。以PAA作为最外层时，多层膜更加刚性和有弹性。此外，已经在多层覆盖表面的顺应性或刚性与这些表面之间的粘附力之间建立了联系。使用原子力显微镜进行的粘附力测量表明，当最外层存在粘性更大的PAH时，剥离力更大。
