Surface rheology of heterogeneous interfaces

异质界面的表面流变学

• 批准号: 111000986
• 负责人: Professor Dr. Thomas Martin Fischer
• 金额: --
• 依托单位: Lehrstuhl für Experimentalphysik V
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/111000986?language=en
• 关键词: Surface; rheology; heterogeneous; interfaces

We propose to view quasi two-dimensional monolayer suspensions on a homogeneous subphase as model sys-tems for complex nano/micro-structured membranes [1]-[4] We will measure their effective rheological behavior with a miniaturized magnetic needle surface rheometer. The goal is to enable predictions of surface rheological properties of a complex membraneous structure from the characteristics of the structure and the rheological properties of the subphase and the single component membrane constituents by experimentally unravelling the major parameters and their effect on the effective surface rheological behavior. Four important parameters are studied in particular: a) The area fraction of the more viscous or solid component of the monolayer, b) the strength of static interactions between the components, c) the internal degrees of freedom of the constituents of the monolayer, such as the conformations of macromolecules, and d) the size of the solid or more viscous constituents of the monolayer. The parameters a-c are known to be relevant for the rheological behavior of three-dimensional (3D) complex fluids. The cross-over length scale, defined by the ratio of the surface to bulk viscosity, renders the size of the colloidal particles as compared to the cross-over length into an additional and crucial quantity for the effective rheological behavior of the complex monolayer.

我们建议将均匀亚相上的准二维单层悬浮液视为复杂纳米/微米结构膜的模型系统[1]-[4]我们将使用小型磁针表面流变仪测量其有效的流变行为。其目标是通过实验揭示主要参数及其对有效表面流变行为的影响，根据面下相和单组分膜成分的结构特征和流变特性来预测复杂膜结构的表面流变特性。特别研究了四个重要参数：a）单层较粘稠或固体成分的面积分数，b）成分之间静态相互作用的强度，c）单层成分的内部自由度，例如大分子的构象，以及d）单层固体或较粘稠成分的尺寸。已知参数 a-c 与三维 (3D) 复杂流体的流变行为相关。交叉长度尺度由表面粘度与本体粘度之比定义，与交叉长度相比，胶体颗粒的尺寸成为复杂单分子层有效流变行为的额外且关键的量。

项目成果

On the diffusion of circular domains on a spherical vesicle

关于球形囊泡上圆形域的扩散

• DOI: 10.1017/s0022112010000650
• 发表时间: 2010
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: Saeedeh Aliaskarisohi;Pietro Tierno;Prajnaparamita Dhar;Ziad Khattari;Marek Blaszczynski;Thomas M. Fischer
• 通讯作者: Thomas M. Fischer

Active interfacial shear microrheology of aging protein films.

• DOI: 10.1103/physrevlett.104.016001
• 发表时间: 2010-01-08
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: Dhar P;Cao Y;Fischer TM;Zasadzinski JA
• 通讯作者: Zasadzinski JA

Dilatational yielding of solid Langmuir monolayers.

固体朗缪尔单层的膨胀屈服

• DOI: 10.1021/jp207173j
• 发表时间: 2011
• 期刊: The journal of physical chemistry. B
• 作者: S. Aliaskarisohi;Th. M. Fischer;N. Wilke
• 通讯作者: N. Wilke

Elastic properties of nanoparticle monolayer foams.

纳米颗粒单层泡沫的弹性性能

• DOI: 10.1021/jp301278j
• 发表时间: 2012
• 期刊: The journal of physical chemistry. B
• 作者: U. Langer;A. Ray;S. Aliaskarisohi;Th. M. Fischer
• 通讯作者: Th. M. Fischer

Surface rheology: macro- and microrheology of poly(tert-butyl acrylate) monolayers

• DOI: 10.1039/c1sm05225j
• 发表时间: 2011-01-01
• 期刊: SOFT MATTER
• 影响因子: 3.4
• 作者: Maestro, Armando;Bonales, Laura J.;Ortega, Francisco
• 通讯作者: Ortega, Francisco