2013
DOI: 10.4322/polimeros.2013.088
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Preparation of poly(urethane-urea) nanoparticles containing açaí oil by miniemulsion polymerization

Abstract: Polyurethane nanoparticles (NPs) are promising candidates for the controlled and targeted delivery of therapeutics in a variety of biomedical applications. In this work, a report is made of NPs produced by miniemulsion polymerization with isophorone diisocyanate (IPDI) and castor oil, glycerol, and poly(ethylene glycol) (PEG) with molar masses 400 and 1000 as monomers and Tween 80, Span 80 and Lutensol AT 25 as surfactant and açaí oil as costabilizer. Stable dispersions with sizes between 100 -500 nm were achi… Show more

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Cited by 27 publications
(31 citation statements)
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“…The same behavior can be observed for the particle size dispersity, which decreased from 0.215 to 0.152, 0.218 to 0.167, 0.215 to 0.152, and 0.161 to 0.138, respectively, with 1 wt% and 20 wt% of surfactant for Tween 80, Brij 35, CTAB and SDS. Increasing surfactant concentration helps monomer droplets stabilization during and after sonication decreasing their coalescence and, thus, leading to the formation of smaller particles with a narrower distribution (lower particle size dispersity) [9], [14], and [30]. In addition, smaller particles were obtained when ionic SLS or CTAB were used instead of nonionic Tween 80 or Brij 35.…”
Section: Characterization and Morphology Of Peg-pu-pcl530 Npsmentioning
confidence: 99%
See 2 more Smart Citations
“…The same behavior can be observed for the particle size dispersity, which decreased from 0.215 to 0.152, 0.218 to 0.167, 0.215 to 0.152, and 0.161 to 0.138, respectively, with 1 wt% and 20 wt% of surfactant for Tween 80, Brij 35, CTAB and SDS. Increasing surfactant concentration helps monomer droplets stabilization during and after sonication decreasing their coalescence and, thus, leading to the formation of smaller particles with a narrower distribution (lower particle size dispersity) [9], [14], and [30]. In addition, smaller particles were obtained when ionic SLS or CTAB were used instead of nonionic Tween 80 or Brij 35.…”
Section: Characterization and Morphology Of Peg-pu-pcl530 Npsmentioning
confidence: 99%
“…The potential of PU nanoparticles (NPs) has been discussed for a variety of pharmaceutical and cosmetic applications, such as medium for controlled release [10], [11], [12], [13] and [14].…”
Section: Introductionmentioning
confidence: 99%
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“…15 Dentro de este marco, se han empleado los aceites esenciales de diferentes semillas oleaginosas (soya, coco, girasol, higuerilla, palma, entre otros) para sintetizar PUs biodegradables, debido a que son económicos, no tóxicos, abundantes y contienen grupos hidroxilos secundarios y triglicéridos de ácidos grasos. [16][17][18][19][20] Dentro de los aceites mencionados el aceite de higuerilla se obtiene de una fuente renovable y la producción se caracteriza por tener bajos precios lo que reduce el costo de la síntesis de PUs y adicional a esto se obtiene un beneficio para el medio ambiente. De otro lado, el aceite de ricino tiene un alto índice hidroxilo que puede reaccionar a temperatura ambiente con un consumo relativamente bajo de energía.…”
Section: Introductionunclassified
“…A obtenção de poli(ureia-uretano) via polimerização em miniemulsão tem atraído muita atenção nas últimas décadas devido ao seu uso em diferentes áreas como farmacêutica, médica e de cosméticos, principalmente como meio para libertação controlada de fármacos devido às suas excelentes propriedades físicas e de biocompatibilidade (Torini et al, 2005;Crespy et al, 2007;Zanetti-ramos et al, 2009;Ding et al, 2011; Gaudin e Sintes-zydowicz de 2011; Valerio et al, 2013). Com base no que foi apresentado, o uso de radiação microondas na polimerização via miniemulsão do diisocianato (IPDI) foi investigada, sendo os efeitos cinéticos dos parâmetros de reação, como temperatura, potência e tipo de poliol investigados, uma vez que a literatura não relata trabalhos de polimerização em miniemulsão em etapas conduzidas em reator microondas como proposto nesse trabalho.…”
Section: Introductionunclassified