LAUSR

This study investigates the solubility, phase behavior, and rheological properties of double‐tailed surfactant (DTS‐12) systems in the presence of hydrotropes, specifically BTAB and TMAB. The results show that the Krafft temperature of DTS‐12 decreased significantly from over 70°C to below 30°C with increasing BTAB concentration, highlighting its superior “salting‐in” effect compared to TMAB. The rheological analysis revealed that at a surfactant concentration of 50 mM and a BTAB concentration of 60 mM, the zero‐shear viscosity reached approximately 103 mPa · s. Moreover, the DTS‐12/BTAB formulation demonstrated good thermal resilience, retaining a viscosity exceeding 103 mPa · s even at a temperature of 90°C. These findings demonstrate the potential of DTS‐12/BTAB systems for forming thermally stable and highly tunable wormlike micelles, which could be applied in advanced material development.