Maltodextrin as stabilizer for emulsion polymerization: Adsorption and grafting behavior

Abstract

Emulsion polymerization of the three‐monomer system butyl acrylate–styrene–methacrylic acid was performed in batch using a commercial maltodextrin derived from starch degradation as stabilizer. Stable latexes with narrow particle size distributions were obtained in all examined cases. A method was developed to analyze and quantify the partitioning of the maltodextrin between the continuous phase (supernatant) and the particle phase. Significant differences between the polysaccharides adsorbed onto particles with or without emulsion polymerization reaction were observed. The possible reactions of maltodextrin in presence of a radical initiator were studied in aqueous phase, thus confirming maltodextrin degradation. The formation of copolymers involving the original monomers and the stabilizer according to two different reactive pathways was also confirmed. In terms of adsorbed maltodextrin, two different contributions were observed: maltodextrin physically adsorbed and maltodextrin chemically grafted and/or physically incorporated into the polymer.

Folic acid–maltodextrin polymer coated magnetic graphene oxide as a NIR-responsive nano-drug delivery system for chemo-photothermal synergistic inhibition of tumor cells

“…[26][27][28] Maltodextrin (MD) is a kind of hydrophilic polysaccharide hydrolyzed by amylase, with extremely rich hydroxyl groups, easy to modify and cross link to form polymers. 29,30 Maltodextrin has good water solubility and biocompatibility, and is oen used as a stabilizer to improve the stability of substances. However, functionalized modications occupy vast functional groups on the GO surface, reducing the drug loading capacity of GO.…”

Crosslinkable dextrin-coated latex via surfactant-free emulsion polymerization

“…Only a limited number of works have reported on the potential use of dextrins as a stabilizer in heterogeneous polymerization, in replacement of synthetic surfactants. Recently, a commercial-grade maltodextrin was used as stabilizer in the soap-free emulsion polymerization of the three-monomer system butyl acrylate-styrene-methacrylic acid [26]. It was suggested that both physically adsorbed maltodextrins and chemically grafted maltodextrins contributed to the steric stabilization of the polymer particles.…”