Fibrillar morphologies of hydrogels obtained from a lamellar medium

Pacios, Isabel E. y Renamayor, Carmen S. . (2011) Fibrillar morphologies of hydrogels obtained from a lamellar medium. European Polymer Journal (v. 48), 2012, pp. 105-115. ISSN: 0014-3057, EISSN: 1873-1945. DOI:10.1016/j.eurpolymj.2011.10.007

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Título Fibrillar morphologies of hydrogels obtained from a lamellar medium
Autor(es) Pacios, Isabel E.
Renamayor, Carmen S.
Materia(s) Física
Química
Resumen Hydrogels are suitable for multiple applications and their properties are strongly dependent on their morphology. Sponge-like morphologies are obtained in conventional hydrogels when the polymerization is performed in isotropic media. Fibrillar morphologies imparting new properties to hydrogels are expected when the reacting medium is anisotropic. Here, we synthesize such fibrillar hydrogels by polymerization in a lamellar medium formed by 1,4- bis(2-ethylhexyl)sodium sulfosuccinate (AOT) and water. At high surfactant content this objective is achieved, and the thickness of the obtained fibrils (0.1-1 μm) can be correlated with the physical properties of the lamellar system. At intermediate AOT concentrations, the morphology is hierarchical, with primary closed pores containing a secondary fibrillar structure that fills the pores. For low AOT concentrations, the crosslinking process is unhindered, and the hydrogels are mechanically consistent with a sponge-like morphology having large (10-102 μm) void pores. The time evolution of the mesophase as polymerization advances is followed by small angle X-ray scattering.
Palabras clave hydrogel
fibrillar morphology
lyotropic medium
Editor(es) Elsevier
Fecha 2011-10-17
Formato application/pdf
Identificador bibliuned:DptoCTFQ-FCIE-MODELICO-1010
http://e-spacio.uned.es/fez/view/bibliuned:DptoCTFQ-FCIE-MODELICO-1010
DOI - identifier 10.1016/j.eurpolymj.2011.10.007
ISSN - identifier 0014-3057, EISSN: 1873-1945
Publicado en la Revista European Polymer Journal (v. 48), 2012, pp. 105-115. ISSN: 0014-3057, EISSN: 1873-1945. DOI:10.1016/j.eurpolymj.2011.10.007
Idioma eng
Versión de la publicación submittedVersion
Relacionado con el proyecto: info:eu-repo/grantAgreement/S2009/ESP-1691
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/openAccess
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Creado: Wed, 03 Sep 2014, 14:19:27 CET