摘要：Polyelectrolyte multilayers (PEMs) are known for being susceptible to structural and mechanical changes in response to the ionic environment. Herein, the changes of the internal structure and surface morphology of (PDDA/PSS)(4) films in an aqueous solution with various ionic conditions were investigated from the aspects of thickness, refractive index, and surface roughness. It was found that the strength of electrostatic shielding and ion doping effect arising from counterions changes with the NaCl concentration rising from 0.0 to 1.0 mol/L, resulting in a V-shaped change of film thickness and a flatter surface morphology. The effect of ion species on the film structure depends on the hydration size of the ions and their position in the Hofmeister series. Based on the refractive index and surface roughness of PEMs obtained by ellipsometry and AFM, the ion-specific effect on the Hamaker constant was also discussed.

关键字：Polyelectrolyte multilayers; Ion-specific effect; Refractive index; Hamaker constant

ISSN号：0303-402X

卷、期、页：卷: 300期: 7页: 813-823

发表日期：2022-07-01

影响因子：1.930600

期刊分区（SCI为中科院分区）：四区

收录情况：SCIE（科学引文索引网络版）,EI（工程索引）

发表期刊名称：COLLOID AND POLYMER SCIENCE

通讯作者：于志鹏,李楷,靳航,葛运通

第一作者：王玮,肖芳伟,吴海浩,宫敬

论文类型：期刊论文

论文概要：于志鹏,李楷,王玮,靳航,葛运通,肖芳伟,吴海浩,宫敬，Effect of ion species and ionic strength on the properties of underwater oleophobic (PDDA/PSS)(4) polyelectrolyte multilayer film，COLLOID AND POLYMER SCIENCE，2022，卷: 300期: 7页: 813-823

论文题目：Effect of ion species and ionic strength on the properties of underwater oleophobic (PDDA/PSS)(4) polyelectrolyte multilayer film