Department of Chemistry, University of Oregon, Eugene, Oregon 97403, United States.
Langmuir. 2011 Mar 15;27(6):2104-6. doi: 10.1021/la104390u. Epub 2011 Feb 8.
Understanding the interfacial adsorption of polymers has become increasingly important because a wide range of scientific disciplines utilize these macromolecular structures to facilitate processes such as nanoparticle assembly, environmental remediation, electrical multilayer assembly, and surfactant adsorption. Structure and adsorption characteristics for poly(acrylic acid) at the oil-water interface have been studied using vibrational sum frequency spectroscopy and interfacial tension to increase the comprehension of polyelectrolyte structure at interfaces. The adsorption of poly(acrylic acid) to the oil-water interface from the aqueous phase is found to be highly pH dependent and occurs in a multistep process, with the initial polymer adsorption displaying a high degree of conformational ordering.
理解聚合物的界面吸附变得越来越重要，因为广泛的科学学科利用这些高分子结构来促进纳米粒子组装、环境修复、电多层组装和表面活性剂吸附等过程。本文使用振动和频光谱和界面张力研究了聚丙烯酸在油水界面的结构和吸附特性，以增加对聚电解质在界面上结构的理解。从水相向油水界面吸附聚丙烯酸高度依赖于 pH 值，并发生多步过程，初始聚合物吸附显示出高度的构象有序性。
