Carrageenan-Silica Hybrid Nanoparticles Prepared by a Non-Emulsion Method
authors Soares, SF; Trindade, T; Daniel-da-Silva, AL
nationality International
journal EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
author keywords Organic-inorganic hybrid composites; Polymers; Nanoparticles; Surface chemistry; Silica
keywords KAPPA-CARRAGEENAN; WATERBORNE POLYURETHANE; COLLOIDAL SILICA; SPECTROSCOPY; IONS; SIZE; DEGRADATION; PARTICLES; GROWTH; EU3+
abstract Spherical and monodispersed sub-micrometer sized particles of organic-inorganic hybrids were prepared by means of a sol-gel non-emulsion method using the biopolymer kappa-carrageenan and the alkoxysilane 3-isocyanatopropyltriethoxysilane (ICPTES). The structural characterization of the carrageenan-silica hybrid particles was performed by using FTIR spectroscopy and solid-state Si-29 and C-13 NMR spectroscopy and confirmed that.-carrageenan was covalently linked to the siliceous network via urethane bonds. Zeta-potential measurements indicate the hybrids were functionalized on the surface with sulfonate groups from the polysaccharide. These hybrids display thermal sensitivity, which is of great relevance for biomedical applications such as drug encapsulation and thermally controlled drug-delivery systems.
publisher WILEY-V C H VERLAG GMBH
issn 1434-1948
year published 2015
issue 27
beginning page 4588
ending page 4594
digital object identifier (doi) 10.1002/ejic.201500450
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000362823700016

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