| dc.description | INTRODUCTION
POLYAna is a new executable software developed by SISLIBIO group for
rheological analysis of hydrogel and organogel systems and other colloidal
materials (nanoparticles and micelles). The software development aims to
facilitate the analysis of rheology data associated to both temperature- and
frequency-dependent analysis, viscosity and curve flow profiles.
OBJECTIVES
The software development aims to facilitate the analysis of rheology data
associated to both temperature- and frequency-dependent analysis, viscosity
and curve flow profiles.
MATERIALS AND METHODS
From raw data, several models are applied like power-law model for
frequency response and curve flow, Boltzmann law to calculate gelation
temperature and viscosity response under temperature,Maxwell model to
study interchain relationships in addition to other models such as
Bingham model, Cross model, and Herschel-Bulkley are also available.
POLYana outputs calculates rheological parameters like consistency, adhesion,
hysteresis, flow index, G???/G??? ratio.
DISCUSSION AND RESULTS
To validate results obtained from POLYana, same data were analyzed by
applying other programs and same mathematical models. In this sense, rheological analysis of Poloxamer 407 in water solution (15 %) were
performed: from temperature-dependent G??? and G??? analysis were obtained
gelation temperature of 45.46 ?? 0.02 ??C, ??_0 = 0.08 ?? 0.03 mPa*s,
??_max = (32.44 ?? 0.17) mPa*s and d??/dT = (1.27 ?? 0.02) mPa*s/??C by
fitting Boltzmann law (R2 = 0.998), which are similar to results obtained
by others softwares and found in literature. From temperature-dependent
G??? and G??? analysis, it gets adhesion value of (1647.15 ?? 18.01) mPa*sn
calculated from power-law model (R2 = 0.869), also similar to PRISM
results.
CONCLUSION
Also, other Poloxamer concentrations and hydrogels types have been
evaluated, showing close numbers to that previously reported. In order
to stablish structural relationships, one of POLYana tools is also to analyze
small-angle neutron scattering (SANS) and develop Monte Carlo
simulation for SANS and rheological analysis, simultaneously. | |
| dc.source | IUPAB International Congress, 20th; SBBf Congress, 45th; Annual Meeting of SBBq, 50th, October 4-8, 2021, S??o Paulo, SP | |
