Goubard Fabrice, Fichet Odile, Teyssié Dominique, Fontaine Philippe, Goldmann Michel
Université de Cergy-Pontoise, LPPI, 5 mail Gay-Lussac Neuville-sur-Oise, 95031 Cergy-Pontoise Cedex, France.
J Colloid Interface Sci. 2007 Feb 1;306(1):82-8. doi: 10.1016/j.jcis.2006.10.016. Epub 2006 Nov 9.
The study of interactions between a polyelectrolyte (sodium polystyrene sulfonate, PSSt) or its water-soluble monomer (SSt) at different concentrations and a monolayer of dioctadecyldimethylammonium bromide (DODA) has been investigated. The monolayer phase behavior and structure at the air-water interface were studied by surface pressure-area isotherms and grazing incidence X-ray diffraction measurements. DODA molecules organize following a rectangular unit cell in all three subphases (pure water, water containing SSt or PSSt). The presence of polyelectrolytes in the subphase decreases, on one hand, the tilt angle and the mean area per molecule in the condensed phase, revealing a higher 2D density in this state, and, on the other hand, the amount of organized matter.
研究了聚电解质（聚苯乙烯磺酸钠，PSSt）或其不同浓度的水溶性单体（SSt）与二辛基二甲基溴化铵（DODA）单层之间的相互作用。通过表面压力-面积等温线和掠入射X射线衍射测量研究了气-水界面处的单层相行为和结构。在所有三个亚相（纯水、含SSt或PSSt的水）中，DODA分子按照矩形晶胞排列。亚相中聚电解质的存在，一方面降低了倾斜角和凝聚相中每个分子的平均面积，表明该状态下二维密度更高，另一方面降低了有序物质的量。
