Colloidal complexes from associated water soluble cellulose derivative (methylcellulose) and green tea polyphenol (Epigallocatechin gallate)

TEM images of colloidal complexes of EGCG with MCE 4 formed at 1:1 w/w ratio (Scale bars 500nm and 200nm). The image clearly indicates appearance of spherical particles clustered together. Novelty of work: We demonstrate for the first time, simple fabrication of self associated colloidal complexes b...

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Bibliographic Details
Published in:Journal of colloid and interface science 2011-12, Vol.364 (2), p.317-323
Main Authors: Patel, A.R., Seijen-ten-Hoorn, J., Velikov, K.P.
Format: Article
Language:English
Subjects:
antioxidant activity
Binding energy
calorimetry
Cellulose
Chemistry
Colloidal complex
Colloidal state and disperse state
Colloids
Derivatives
energy
enthalpy
epigallocatechin
Epigallocatechin gallate
Exact sciences and technology
Gallates
General and physical chemistry
Green tea
hydrogen bonding
In vitro testing
Isothermal titration calorimetry
Methyl cellulose
methylcellulose
mixing
Physical and chemical studies. Granulometry. Electrokinetic phenomena
polymers
polyphenols
solutions
stoichiometry
titration
Titration calorimetry
transmission electron microscopy
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Summary:TEM images of colloidal complexes of EGCG with MCE 4 formed at 1:1 w/w ratio (Scale bars 500nm and 200nm). The image clearly indicates appearance of spherical particles clustered together. Novelty of work: We demonstrate for the first time, simple fabrication of self associated colloidal complexes based on polymer–polyphenol interaction. Special consideration to their characterisation by ITC, in vitro release and antioxidant studies are also highlighted. [Display omitted] ► Epigallocatechin gallate:methylcellulose colloidal complex via simple addition. ► Binding parameters evaluated by Iso thermal titration calorimetry. ► Sustained release and improvement in antioxidant property of EGCG. The present work deals with the preparation and characterisation of colloidal complexes from association of water soluble cellulose derivative (methylcellulose) and green tea polyphenol–EGCG (Epigallocatechin gallate). Colloidal complexes with well defined size range of 95–300nm (polydispersity index
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2011.08.054