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Tailoring relaxation time spectrum in soft glassy materials.
Manish Kaushal1, Yogesh M Joshi
1Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India.
The Journal of Chemical Physics
|July 19, 2013
Summary
Controlled deformation tailors aging soft glassy material properties. Applying stress during aging narrows relaxation times, offering a new method to control rheology.
Area of Science:
- Materials Science
- Rheology
- Soft Matter Physics
Background:
- Physical properties of soft materials depend on time and deformation history.
- Aging soft glassy materials exhibit complex rheological behavior.
Purpose of the Study:
- To transform the time-dependent nature of soft materials into a controllable property.
- To tailor rheological properties using controlled deformation fields.
Main Methods:
- Applying controlled deformation fields to aging soft glassy materials.
- Investigating two soft glassy materials with different microstructures.
- Analyzing the spectrum of relaxation times under varying deformation strengths.
Main Results:
- Controlled deformation prevents particles from occupying shallow energy wells.
- Increased deformation field strength during aging narrows the spectrum of relaxation times.
- The effect was observed in materials with dissimilar microstructures.
Conclusions:
- Deformation field strength can be used to control the rheological properties of aging soft glassy materials.
- This approach offers a method to narrow the relaxation time spectrum.
- The philosophy is potentially applicable to various glassy materials.
