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Influence of Ionic Liquid and Light Intensity on a Polymer Nanostructure Formed in Lyotropic Liquid Crystalline Templates.
Kotsiras, Alexandros; Whitley, John; Orozco, Esmeralda; Guymon, C Allan.
Afiliación
  • Kotsiras A; Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa 52242, United States.
  • Whitley J; Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa 52242, United States.
  • Orozco E; Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa 52242, United States.
  • Guymon CA; Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa 52242, United States.
ACS Appl Polym Mater ; 6(5): 2442-2452, 2024 Mar 08.
Article en En | MEDLINE | ID: mdl-38481475
ABSTRACT
Utilizing self-assembled lyotropic liquid crystal (LLC) templates with radical photopolymerization shows promise in controlling polymer structure on the nanometer scale This control of nanostructure allows tailoring and enhancement of material properties not attainable in traditional polymerization in applications including hydrogels and stimuli-responsive systems. However, thermodynamically driven phase separation between the polymer and LLC templates often hinders the control of local polymer order and resultant polymer properties. This study investigates an alternative method to control the hydrogel nanostructure and avoid phase separation using imidazolium ionic liquids (ILs) in the LLC template while modulating the light intensity used in photopolymerization. The addition of the IL improves the thermodynamic stability and enhances the polymerization rate in the LLC system. The degree of LLC nanostructure retention is increased by increasing light intensities during polymerization. In addition, intermediate concentrations of cross-linker allow a balance between phase stability and cross-linking to lock in LLC morphology. With enhanced retention, the maximum water uptake is significantly higher compared with isotropic controls. These results demonstrate a method to increase the structure on the nanometer scale of a polymer by combining the addition of ILs with the proper selection of light intensity and cross-link density that allows access to unique hydrogel properties. These templated polymers demonstrate enhanced swelling and a stimuli response that show promise in applications ranging from drug delivery to water remediation.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Polym Mater Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Polym Mater Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos