Soft and responsive: rheological insights into PNIPAM based microgels and applications
Silvia Franco1, Barbara Ruzicka1, Roberta Angelini2
1Institute for Complex Systems, Sede Sapienza, National Research Council, piazzale Aldo Moro 5, Roma, 00185, ITALY.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|February 28, 2025
Summary
This review synthesizes poly(N-isopropylacrylamide) (PNIPAM) microgel rheology, detailing flow behavior across various structures. Understanding these tunable soft materials is crucial for diverse applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Rheology
Background:
- Poly(N-isopropylacrylamide) (PNIPAM) microgels are versatile soft materials with tunable properties.
- Their rheological behavior is critical for understanding and optimizing their performance in various applications.
Purpose of the Study:
- To synthesize and critically evaluate findings on the rheology of PNIPAM microgels.
- To provide a comprehensive analysis of their flow behavior based on structure and experimental conditions.
- To identify current challenges and future research directions in the field.
Main Methods:
- Review of past and recent literature on PNIPAM microgel rheology.
- Analysis of rotational and oscillatory shear rheology measurements.
- Examination of factors influencing rheology: structure, crosslinker density, temperature, pH, and polymer concentration.
Main Results:
- Differences and similarities in rheological behavior are observed across homopolymeric, core-shell, copolymeric, and interpenetrate polymer network microgels.
- Key parameters like crosslinker density, temperature, pH, and polymer concentration significantly influence flow behavior.
- Practical implications of rheological properties for applications are highlighted.
Conclusions:
- A comprehensive understanding of PNIPAM microgel rheology is essential for their effective application.
- This review serves as a foundational resource for researchers, outlining current challenges and future research avenues.
- Further investigation into structure-property relationships will enable tailored material design.
