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• W3104694310 startingPage "12853" @default.
• W3104694310 abstract "Abstract Poloxamers or Pluronics® (PL) have been described as promising pharmaceutical and cosmetics matrices. Herein, we have explored the structural organization of hydrogel formulations composed of PL F‐127 and PL L‐81, considering their different hydrophilic‐lipophilic balances and interactions with an antimigraine drug, sumatriptan succinate (SMT). Hydrogels phase organizations were investigated by X‐ray diffraction (XRD) and Small Angle Neutron Scattering (SANS) to establish the relationship between structural features and drug release modulation. XRD analysis revealed very low intensity peaks for hydrogels containing SMT due to the presence of small amounts of SMT as crystalline form, which is an evidence of drug incorporation into hydrogels. At physiological temperature, a structural transition from lamellar to hexagonal was observed after SMT incorporation. In addition, SANS patterns displayed a distorted hexagonal structure, (calculated >experimental ), indicating the presence of a comprised structure compared to a perfect hexagonal assembly. This structural shift however have no influence on the drug release mechanism, allowing the SMT molecules to access the micellar and intermicellar hydrophilic spaces, with release mechanism dependent on the drug diffusion (R 2 =0.998 ≥ 0.986) from the hydrogel to the medium and release constant (Krel) values from 9.8 to 14.7 %.h −1 ; 31.5 to 39.1 %.h −1/2 ; 0.84 to 1.2 %.h −n for Zero‐order, Higuchi and Korsmeyer‐Peppas models, respectively. Using SMT as a drug model, it could be concluded that the drug access to the micellar/intermicellar hydrophilic spaces can be modulated by interplaying the polarity of binary PL‐based hydrogels. Therefore, drug release constants and mechanisms will be then dependent on the hydrogels physico‐chemical and structural properties, which determine the drug diffusion from the hydrogel to the release medium." @default.
• W3104694310 created "2020-11-23" @default.
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• W3104694310 date "2020-11-13" @default.
• W3104694310 modified "2023-09-26" @default.
• W3104694310 title "Supramolecular Structure of Temperature‐Dependent Polymeric Hydrogels Modulated by Drug Incorporation" @default.
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• W3104694310 doi "https://doi.org/10.1002/slct.202001116" @default.
• W3104694310 hasPublicationYear "2020" @default.
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