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Solvent strategies for loading and release in mesoporous silica
RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Life Science.
RISE., SP – Sveriges Tekniska Forskningsinstitut.
Karlstad University, Sweden.
Karlstad University, Sweden.
2014 (engelsk)Inngår i: Colloid and Interface Science Communications, ISSN 2215-0382, Vol. 3, s. 5-8Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A model molecule, ibuprofen, was loaded in the pores of mesoporous silica by adsorption from nonpolar solvents (liquid carbon dioxide and cyclohexane) and from a polar solvent (methanol). It was sufficient with a very low concentration of ibuprofen in the nonpolar solvents to achieve maximum loading of ibuprofen in the mesoporous particles. When using liquid carbon dioxide, the pores of the mesoporous silica particles were filled completely with ibuprofen at a lower ibuprofen concentration than similar experiments performed with cyclohexane. When methanol was used, the maximum amount of loaded ibuprofen was never achieved. Furthermore, x-ray scattering showed that all ibuprofen loaded into the mesoporous particles were in an amorphous state. Ibuprofen was released from the mesoporous particles to water within a couple of minutes, regardless of solvent used for loading. It was found that the release of ibuprofen from mesoporous silica was much faster than that of crystalline ibuprofen.

sted, utgiver, år, opplag, sider
2014. Vol. 3, s. 5-8
Emneord [en]
Mesoporous silica, Green solvents, Liquid carbon dioxide, Adsorption isotherm
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-6843DOI: 10.1016/j.colcom.2015.01.001Scopus ID: 2-s2.0-84923003568Lokal ID: 23743OAI: oai:DiVA.org:ri-6843DiVA, id: diva2:964684
Tilgjengelig fra: 2016-09-08 Laget: 2016-09-08 Sist oppdatert: 2020-12-01bibliografisk kontrollert

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