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Colloidal complexation of a macromolecule with a small molecular weight natural polyphenol: implications in modulating polymer functionalities

Ashok Patel UGent, Jack Seijen ten-Hoorn, Johan Hazekamp, Theo BJ Blijdenstein and Krassimir P Velikov (2013) SOFT MATTER. 9(5). p.1428-1436
abstract
Natural polyphenolic compounds show interesting complexation behavior with various macromolecules due to their unique structural characteristics that enables molecular transition such as electronic delocalization and conjugation and intra- and intermolecular hydrogen bonding. Here, we report on the preparation and characterization of novel colloidal complexes (size range of 56-116 nm) based on the spontaneous interactions of a small molecular weight polyphenol (tannic acid) with an industrially relevant macromolecule (methylcellulose). The binding stoichiometry obtained from isothermal titration calorimetry suggested that 33 molecules of tannic acid were bound to one molecule of polymer. The values of Delta H (-11.4 kJ mol(-1)) and Delta S (similar to 35.5 J K-1 mol(-1)) suggested that the interaction was enthalpy driven and the relatively low value of DH further indicated the non-covalent nature (i.e. hydrophobic interaction and hydrogen bonding) of the interaction. Effects of this complexation on the functionalities of methylcellulose were investigated in terms of the loss of thermoreversible gelling (due to the irreversible association of colloidal complexes at high temperature), improvement of the emulsifying property (because of the interfacial localization of hydrophobic colloidal complexes further contributing to the gelling of the interfacial film) and enhancement of the foam stabilizing property (based on the absorption of colloidal complexes on the air-water interface and resulting enhancement of the interfacial stiffness due to surface gelation invoked by the colloidal complexes). These findings will be of wide interest to researchers and industrial scientists working in the field of polymer chemistry and material science, especially because methylcellulose is one of the most commonly used polymers for a range of industrial applications.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
tannic acid, Colloids, interfacial stabilization, foam stabilization, ISOTHERMAL TITRATION CALORIMETRY, TANNIC-ACID, PROTEIN, CELLULOSE, METHYLCELLULOSE, WATER, BINDING, POLYVINYLPYRROLIDONE, POLY(L-LYSINE), CHROMATOGRAPHY
journal title
SOFT MATTER
Soft Matter
volume
9
issue
5
pages
1428 - 1436
Web of Science type
Article
Web of Science id
000312945200005
JCR category
POLYMER SCIENCE
JCR impact factor
4.151 (2013)
JCR rank
9/82 (2013)
JCR quartile
1 (2013)
ISSN
1744-683X
DOI
10.1039/c2sm27200h
language
English
UGent publication?
yes
classification
A1
additional info
corrections published in Soft Matter (2013) 9(48), 11710 and Soft Matter (2014) 10(33), 6359
copyright statement
I have transferred the copyright for this publication to the publisher
id
3050912
handle
http://hdl.handle.net/1854/LU-3050912
date created
2012-11-12 11:39:56
date last changed
2015-01-16 16:08:25
@article{3050912,
  abstract     = {Natural polyphenolic compounds show interesting complexation behavior with various macromolecules due to their unique structural characteristics that enables molecular transition such as electronic delocalization and conjugation and intra- and intermolecular hydrogen bonding. Here, we report on the preparation and characterization of novel colloidal complexes (size range of 56-116 nm) based on the spontaneous interactions of a small molecular weight polyphenol (tannic acid) with an industrially relevant macromolecule (methylcellulose). The binding stoichiometry obtained from isothermal titration calorimetry suggested that 33 molecules of tannic acid were bound to one molecule of polymer. The values of Delta H (-11.4 kJ mol(-1)) and Delta S (similar to 35.5 J K-1 mol(-1)) suggested that the interaction was enthalpy driven and the relatively low value of DH further indicated the non-covalent nature (i.e. hydrophobic interaction and hydrogen bonding) of the interaction. Effects of this complexation on the functionalities of methylcellulose were investigated in terms of the loss of thermoreversible gelling (due to the irreversible association of colloidal complexes at high temperature), improvement of the emulsifying property (because of the interfacial localization of hydrophobic colloidal complexes further contributing to the gelling of the interfacial film) and enhancement of the foam stabilizing property (based on the absorption of colloidal complexes on the air-water interface and resulting enhancement of the interfacial stiffness due to surface gelation invoked by the colloidal complexes). These findings will be of wide interest to researchers and industrial scientists working in the field of polymer chemistry and material science, especially because methylcellulose is one of the most commonly used polymers for a range of industrial applications.},
  author       = {Patel, Ashok and Seijen ten-Hoorn, Jack and Hazekamp, Johan and Blijdenstein, Theo BJ and Velikov, Krassimir P},
  issn         = {1744-683X},
  journal      = {SOFT MATTER},
  keyword      = {tannic acid,Colloids,interfacial stabilization,foam stabilization,ISOTHERMAL TITRATION CALORIMETRY,TANNIC-ACID,PROTEIN,CELLULOSE,METHYLCELLULOSE,WATER,BINDING,POLYVINYLPYRROLIDONE,POLY(L-LYSINE),CHROMATOGRAPHY},
  language     = {eng},
  number       = {5},
  pages        = {1428--1436},
  title        = {Colloidal complexation of a macromolecule with a small molecular weight natural polyphenol: implications in modulating polymer functionalities},
  url          = {http://dx.doi.org/10.1039/c2sm27200h},
  volume       = {9},
  year         = {2013},
}

Chicago
Patel, Ashok, Jack Seijen ten-Hoorn, Johan Hazekamp, Theo BJ Blijdenstein, and Krassimir P Velikov. 2013. “Colloidal Complexation of a Macromolecule with a Small Molecular Weight Natural Polyphenol: Implications in Modulating Polymer Functionalities.” Soft Matter 9 (5): 1428–1436.
APA
Patel, A., Seijen ten-Hoorn, J., Hazekamp, J., Blijdenstein, T. B., & Velikov, K. P. (2013). Colloidal complexation of a macromolecule with a small molecular weight natural polyphenol: implications in modulating polymer functionalities. SOFT MATTER, 9(5), 1428–1436.
Vancouver
1.
Patel A, Seijen ten-Hoorn J, Hazekamp J, Blijdenstein TB, Velikov KP. Colloidal complexation of a macromolecule with a small molecular weight natural polyphenol: implications in modulating polymer functionalities. SOFT MATTER. 2013;9(5):1428–36.
MLA
Patel, Ashok, Jack Seijen ten-Hoorn, Johan Hazekamp, et al. “Colloidal Complexation of a Macromolecule with a Small Molecular Weight Natural Polyphenol: Implications in Modulating Polymer Functionalities.” SOFT MATTER 9.5 (2013): 1428–1436. Print.