Pluronic PE9400/water binary systems at different concentrations were characterized by means of rheological and microstructural techniques. Temperature ramps revealed a structural transition defined by three zones, which determine time-dependent behaviors. Thus, non-time-dependent, antithixotropic, and thixotropic behaviors were observed depending on Pluronic’s concentration and temperature. These phenomena were analyzed resorting to rheological tools, namely hysteresis loops and transient tests, and supported by Cryo-SEM. The results obtained demonstrated the shear-sensitive character of these systems. All properties presented by these systems make them adequate and interesting for many applications such as injectable systems for tissue repair.
Pluronic PE9400 Stimuli-sensitive hydrogels Temperature ramp Start-up at inception shear tests Time-dependent behavior Shear-induced structures
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M.T. Cidade acknowledges EURAMET (Project EURAMET/JRP/ENG59) for supporting her stay in Seville University.
The financial support was received (Project CTQ2015-70700-P) from the Spanish Ministerio de Economia y Competitividad, as well as the support from the Portuguese Foundation for Science and Technology through the strategic project UID/CTM/50025/2013 (Cenimat/I3N) and the European Commission (FEDER Programme).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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