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Title: | Modulating size and surface charge of ethylcellulose nanoparticles through the use of cationic nano-emulsion templates |
Author: | Calderó Linnhoff, Gabriela Leitner, Stefanie García Celma, Ma José Solans Marsà, Conxita |
Keywords: | Nanopartícules Emulsions (Farmàcia) Nanofluids Materials nanoestructurats Nanoparticles Emulsions (Pharmacy) Nanofluids Nanostructured materials |
Issue Date: | 1-Dec-2019 |
Publisher: | Elsevier B.V. |
Abstract: | Ethylcellulose nano-emulsions have been obtained by the low-energy phase inversion composition method in the Water / [Alkylamidoammonium: Cremophor WO7] / [6% ethylcellulose in ethyl acetate] system at 25 °C. It is shown that nano-emlulsions' composition variables (oil-to-surfactant ratio, cationic: nonionic surfactant ratio and polymer and water content) produce changes in their droplet diameter, surface charge and colloidal stability following defined trends. Nano-emulsions with good stability, droplet diameters between about 120 and 200 nm and surface charge from about 10 to 50 mV have been obtained. Nano-emulsions are further used as templates for nanoparticle dispersions preparation, which show sizes and surface charges typically smaller and similar respectively to their nano-emulsion templates. Cationic: nonionic surfactant ratio has the highest influence on both, size and surface charge, followed by oil-to-surfactant ratio and water content. Interestingly, the positive charge of the nanoparticles can be depleted under diluting conditions in a time-dependent manner. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.carbpol.2019.115201 |
It is part of: | Carbohydrate Polymers, 2019, vol. 225 |
URI: | http://hdl.handle.net/2445/178927 |
Related resource: | https://doi.org/10.1016/j.carbpol.2019.115201 |
ISSN: | 0144-8617 |
Appears in Collections: | Articles publicats en revistes (Farmàcia, Tecnologia Farmacèutica i Fisicoquímica) |
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