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http://hdl.handle.net/10198/7572
Título: | Preparation of chitosan/gum Arabic nanoparticles and their use as novel stabilizers in oil/water Pickering emulsions |
Autor: | Sharkawy, Asma Barreiro, M.F. Rodrigues, Alírio |
Palavras-chave: | Chitosan/gum Arabic nanoparticles Nanoparticles wettability Pickering emulsions Rheological properties Surfactant-free emulsions |
Data: | 2019 |
Citação: | Sharkawy, Asma; Barreiro, Maria Filomena; Rodrigues, Alírio Egídio (2019). Preparation of chitosan/gum Arabic nanoparticles and their use as novel stabilizers in oil/water Pickering emulsions. Carbohydrate Polymers. ISSN 0144-8617. 224, p. 1-9 |
Resumo: | Recently, there has been a renewed interest in Pickering emulsions owing to their surfactant-free nature, and the use of natural-based particles as stabilizers became a priority due to the applications they can enable. In this work, chitosan/gum Arabic (CH/GA) nanoparticles were synthesized and tested as novel stabilizers. Among the tested CH/GA weight ratios, the particles prepared using 1:1 ratio exhibited near-neutral wettability, an average size of 108.6 nm and a zeta potential of 56.3 mv. Pickering emulsions prepared from these particle dispersions (1.5% w/v), and high oil volume fractions (φ=0.6, 0.7), have shown high storage stability. Moreover, confocal laser scanning microscopy confirmed the o/w type and the effective adsorption of the nanoparticles at the oil/ water interface forming a barrier against droplets coalescence. The emulsions have shown shear-thinning and elastic-like behavior. These findings open new avenues for using these emulsions as novel delivery systems, e.g. in cosmetic and food applications. |
Peer review: | yes |
URI: | http://hdl.handle.net/10198/7572 |
DOI: | 10.1016/j.carbpol.2019.115190 |
ISSN: | 0144-8617 |
Aparece nas colecções: | CIMO - Artigos em Revistas Indexados à WoS/Scopus |
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