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Systematically Exploring Molecular Aggregation and Its Impact on Surface Tension and Viscosity in High Concentration
Huan Wang1, Han Kong1, Jie Zheng1
1College of Textiles & Clothing, State Key Laboratory for Biofibers and Eco-textiles, Collaborative Innovation Center for Eco-textiles of Shandong Province, Qingdao University, Qingdao 266071, China.
Molecules (Basel, Switzerland)
|April 3, 2020
Summary
Dye molecule aggregation significantly impacts high-concentration solutions. O-13 dye exhibits stronger aggregation due to its molecular structure, influencing solution properties like surface tension and viscosity.
Area of Science:
- Dye Chemistry
- Physical Chemistry
- Materials Science
Background:
- Dye molecule aggregation profoundly affects solution properties, particularly at high concentrations.
- Understanding aggregation behavior is crucial for optimizing dye applications.
Purpose of the Study:
- To systematically investigate dye molecular aggregation structures in high-concentration aqueous solutions.
- To correlate molecular structure with aggregation tendencies and solution properties.
Main Methods:
- Systematic investigation of three reactive dyes (O-13, R-24:1, R-218) in high-concentration aqueous solutions.
- Analysis of aggregation using absorption curve splitting to determine aggregate distributions.
- Evaluation of surface tension and viscosity changes.
Main Results:
- O-13 demonstrated stronger aggregation compared to R-24:1 and R-218, attributed to its non-conjugate side chain and β-linked naphthalene position.
- R-24:1 exhibited weaker aggregation than O-13 due to its better solubility.
- Surface tension and viscosity were found to be influenced by both dye aggregation and hydrophilic group positioning.
Conclusions:
- Dye molecular structure dictates aggregation behavior in high-concentration solutions.
- Aggregation and hydrophilic group position are key factors controlling solution surface tension and viscosity.
- Findings offer guidance for studying and manipulating high-concentration dye solutions.
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