A torrent intercepts the ionic flow in a polyelectrolyte solution.

Watanabe, Kaito; Naya, Sayaka; Yamagata, Yoshifumi; Miyamoto, Keisuke; Kawai, Mika; Mitsumata, Tetsu · Soft Matter · 2025

basic_science · Level V

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Abstract

An anomalous flow response of electric properties was observed in 0.01 wt% aqueous solutions of polyacrylic acid sodium salt (NaPAA) by electric measurements under shear flow using a newly developed apparatus. This response is considered to be caused by the migration of PAA<sup>-</sup> ions being intercepted by the turbulent flow generated by the high shear rate, resulting in the inability to form macroscopic polarizations.