Fluorescent complex coacervates of agar and in situ formed zein nanoparticles: Role of electrostatic forces.

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ID: 60050
2019
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Ranked #117 of 138 articles by views in Carbohydrate polymers

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Abstract
Herein, the complex coacervation between in situ formed spherical fluorescent zein nanoparticles and polyanion agar as function of mixing ratio (R=[Agar]/[Zein]) was investigated. This interaction yielded two distinguishable regions (at pH 5.4): Region I (R < 0.2), where fully charge neutralized soluble complexes with protein denaturation was noticed, and Region II (R > 0.2), where overcharged complexes were formed, with R = 0.2 defining the optimum binding. Small angle neutron scattering studies demonstrated that in the low-q region, nanoparticles formed the crosslink junctions and in the persistence regime of high-q region, the data captured the cross-sectional radius ( = 3.5 nm) for agar-zein complexes. The coacervates became more viscoelastic in salt-free samples because both the low frequency storage modulus and crosslink density were found to decrease with mixing ratio. Systematic decrease in storage modulus with ionic strength (0-0.01 M) implied screened Coulomb interaction was responsible for the observed coacervation. Further, we seek to find universality in complex coacervation of zein nanoparticle with biopolymers, and polysaccharides in particular.
Reference Key
kaushik2019fluorescentcarbohydrate Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Kaushik, Priyanka;Rawat, Kamla;Aswal, V K;Kohlbrecher, J;Bohidar, H B;
Journal Carbohydrate polymers
Year 2019
DOI
S0144-8617(19)30817-3
URL
Keywords
carbohydrate-protein interaction charge neutralization interpolymer complex formation protein nanoparticle

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