Abstract
The purpose of this work was to introduce modified hydrolyzed starches (anionic) as surfactant in a formulation for the encapsulation of benzophenone-3 with a polymer matrix of poly(e-caprolactone) (PCL), including the study of the influence from the surfactant on the physicochemical characteristics of nanoparticles. The nanoparticles were prepared via interfacial deposition of the pre-formed polymer, using an experiment design for the mixtures. The starches were initially hydrolyzed via an enzymatic process and surface tension measurements were performed to assess the ability of surfactant aqueous solutions of hydrolyzed starch for application in nanocapsule formulations. The results indicated that the starches can be employed as surfactant in the formulations, without significantly altering properties such as diameter, polydispersity and encapsulation efficiency.
Highlights
Starches were initially hydrolyzed via an enzymatic process and surface tension measurements were performed to assess the ability of surfactant aqueous solutions of hydrolyzed starch for application in nanocapsule formulations
The results indicated that the starches can be employed as surfactant in the formulations, without significantly altering properties such as diameter, polydispersity and encapsulation efficiency
G. - “Desenvolvimento e caracterização de suspensões contendo nanocápsulas de adapaleno com diferentes núcleos oleosos”, Dissertação de Mestrado, Centro Universitário Franciscano, Brasil (2010)
Summary
O amido modificado aniônico utilizado neste trabalho foi o Superion 3050, com grau de substituição. Os amidos aniônicos hidrolisados aplicados nas formulações foram denominados como: Amido. Aniônico de Alta Massa Molar (AAAMM), com massa molar ponderal média (Mw) de 2952,2 g/mol, massa molar numérica média (M ) de 1330,0 g/mol e índice n de polidispersão (IP) igual a 2,22; e Amido Aniônico de. A matriz polimérica, n poli(ε-caprolactona) (PCL) foi sintetizada em laboratório, via polimerização em massa[18] e apresentou os seguintes valores massas molares e polidispersão:. M = 45654 g/mol, M = 69926 g/mol e IP = 1,53. (polisorbato 80), foi fornecido pela empresa Oxiteno. Os demais produtos químicos e todos os solventes foram utilizados sem tratamento prévio para purificação por apresentarem grau de pureza analítico
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