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Reentrant phase transition in pH-responsive microgel suspensions

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The study investigates a unique type of phase transition in pH-responsive microgel suspensions, focusing on the mechanisms behind this behavior.
Experimental observation of microgel suspensions under varying pH conditions using sodium hydroxide (NaOH)
Analysis of structural transitions and viscoelastic properties during phase changes
Discussion in the context of existing literature on microgels and charged colloidal systems.
Demonstrated a liquid-like to crystalline to liquid-like phase transition in PNIPAM-co-PAac microgels as pH is increased.
Recorded changes in volume fraction and Coulombic interactions affecting microgel behavior amid osmotic swelling and deswelling processes.
Observed reentrant viscoelastic properties, transitioning from liquid-like to solid-like states and back with pH adjustments.

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Experimental evidence demonstrates reentrant phase transitions in pH-responsive microgel suspensions, suggesting new behaviors in colloidal systems.

S et al. (2026) studied this question.

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Experimental evidence demonstrates reentrant phase transitions in pH-responsive microgel suspensions, suggesting new behaviors in colloidal systems.