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Protecting metal-organic framework crystals from hydrolytic degradation by spray-dry encapsulating them into polystyrene microspheres
Carné Sánchez, Arnau (Institut Català de Nanociència i Nanotecnologia)
Stylianou, Kyriakos C. (Institut Català de Nanociència i Nanotecnologia)
Carbonell Fernández, Carlos (Institut Català de Nanociència i Nanotecnologia)
Naderi, Majid (Surface Measurement Systems)
Imaz, Inhar (Institut Català de Nanociència i Nanotecnologia)
Maspoch Comamala, Daniel (Institut Català de Nanociència i Nanotecnologia)

Fecha: 2015
Resumen: A one-step, alternative, rapid, and scalable spray-drying (SD) synthesis of metal-organic frameworks (MOF)@polymer composites with enhanced hydrolytic stabilities was reported. SD was used to encapsulate preformed MOF crystals in a polymeric matrix to generate microscale MOF@polymer spheres. For proof-of-concept Hong-Kong University of Science and Technology-1 (HKUST-1) was chosen as the water-sensitive MOF, and polystyrene (PS) as the organic polymer. The synthesis of HKUST-1@PS began with preparation of a stable colloidal suspension of HKUST-1 crystals and a solution of PS in dichloromethane (DCM). This mixture was atomized using a two-fluid nozzle. After 40 min of continuous spraying, 1. 7 g of a blue powder was recovered. The sample was then washed with ethanol and dried at 120°C under vacuum. This product was analyzed through field-emission scanning electron microscopy (FESEM), which indicated that it comprised smooth microspheres of HKUST-1@PS composites and did not contain any free HKUST-1. X-ray powder diffraction (XRPD) analysis of these spheres revealed a perfect match with the HKUST-1 pattern. The exclusive presence of microspheres and the match in XRPD patterns evidenced that HKUST-1 crystals were indeed entrapped within the polymeric matrix of PS.
Nota: Número d'acord de subvenció MINECO/CTQ2011-16009-E
Nota: Número d'acord de subvenció EC/FP7/61594
Nota: Número d'acord de subvenció MINECO/MAT2012-30994
Derechos: Tots els drets reservats.
Lengua: Anglès.
Documento: article ; recerca ; acceptedVersion
Materia: Colloidal suspensions ; Hydrolytic degradation ; Hydrolytic stability ; Metal organic framework ; Polymeric matrices ; Polystyrene micro-sphere
Publicado en: Advanced materials, Vol. 27, Issue 5 (February 2015) , p. 869-873, ISSN 1521-4095

DOI: 10.1002/adma.201403827
PMID: 25492381

13 p, 3.0 MB

El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Institut Català de Nanociència i Nanotecnologia (ICN2)
Artículos > Artículos de investigación
Artículos > Artículos publicados

 Registro creado el 2019-09-23, última modificación el 2019-10-25

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