Molecular aggregation: structure analysis and molecular simulation of crystals and liquids

2007 ◽  
Vol 44 (12) ◽  
pp. 44-6858-44-6858
Keyword(s):  
Molecular Simulation ◽  
Structure Analysis ◽  
Molecular Aggregation ◽  
Aggregation Structure

scholarly journals Systematically Exploring Molecular Aggregation and Its Impact on Surface Tension and Viscosity in High Concentration Solutions

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1588 ◽  
Author(s):  
Huan Wang ◽  
Han Kong ◽  
Jie Zheng ◽  
Hui Peng ◽  
Chuangui Cao ◽  
...  
Keyword(s):  
Surface Tension ◽  
Great Influence ◽  
Reactive Dyes ◽  
Side Chain ◽  
Molecular Aggregation ◽  
Dye Molecules ◽  
High Concentration ◽  
Hydrophilic Group ◽  
Aggregation Structure ◽  
Dye Solutions

The aggregation structure of dye molecules has a great influence on the properties of dye solutions, especially in high concentration. Here, the dye molecular aggregation structures were investigated systemically in aqueous solutions with high concentration using three reactive dyes (O-13, R-24:1 and R-218). O-13 showed stronger aggregation than R-24:1 and R-218. This is because of the small non-conjugate side chain and its β-linked position on the naphthalene of O-13. Compared with R-218, R-24:1 showed relatively weaker aggregation due to the good solution of R-24:1. The change of different aggregate distributions in the solutions were also investigated by splitting the absorption curves. Moreover, it is found that the surface tension of solutions can be modified by the combined effect of both aggregation and the position of the hydrophilic group, which, however, also have an effect on viscosity. This exploration will provide guidance for the study of high concentration solutions.

scholarly journals Two-dimensional Molecular Aggregation Structure and Thermal Molecular Motion of Polyalkylsiloxane Ultrathin Films

2007 ◽  
Vol 64 (5) ◽  
pp. 269-279
Author(s):  
Tomoyuki KOGA ◽  
Koji HONDA ◽  
Sono SASAKI ◽  
Osami SAKATA ◽  
Atsushi TAKAHARA
Keyword(s):  
Ultrathin Films ◽  
Molecular Motion ◽  
Molecular Aggregation ◽  
Two Dimensional ◽  
Aggregation Structure

scholarly journals Microrheology to Understand the Viscosity Behavior of a Sophorolipid Biosurfactant

2022 ◽  
Vol 6 (1) ◽  
pp. 3
Author(s):  
Jochen Kleinen ◽  
Jan Langwald ◽  
Joachim Venzmer ◽  
Hacer Yalcinkaya
Keyword(s):  
Molecular Aggregation ◽  
Practical Relevance ◽  
Carboxylate Group ◽  
Microscopic Scale ◽  
Structure And Dynamics ◽  
Viscosity Behavior ◽  
Aggregation Structure ◽  
Exchange Kinetics ◽  
Insight Into ◽  
Acidic Sophorolipid

The microstructure of the aqueous solutions of purified acidic Sophorolipid (SL) has previously been studied using highly sophisticated methods such as SANS and Cryo-TEM. We were interested in whether (a) the main findings also apply to commercially available SL (which is a mixture of acidic and lactonic SL) and (b) more readily available methods such as DLS can be used to gain insight into the molecular aggregation of SL. Our work was motivated by the increasing interest in biosurfactants for applications in personal and household care. Moreover, the origin behind the more or less lack of rheological response to changes in pH is of practical relevance, as it is somewhat unusual for a carboxylate-group containing surfactant. By using DLS microrheology, we could elucidate the aggregation structure and dynamics of the surfactant on a microscopic scale. Surprisingly, the different degrees of protonation only impacted the microscopic properties such as exchange kinetics and the plateau values of the storage moduli.

Molecular aggregation structure and water repellency of Poly(perfluorohexyl acrylate) with a carbamate linkage

Polymer ◽  
2019 ◽  
Vol 182 ◽  
pp. 121846
Author(s):  
Yi Liu ◽  
Yuji Higaki ◽  
Masaru Mukai ◽  
Atsushi Takahara
Keyword(s):  
Water Repellency ◽  
Molecular Aggregation ◽  
Aggregation Structure
Sign in / Sign up

Export Citation Format

Share Document