Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/27476
Title: Synthesis of polyampholyte microgels from colloidal salts of pectinic acid and their application as pH-responsive emulsifiers
Authors: Mironov, M. A.
Shulepov, I. D.
Ponomarev, V. S.
Bakulev, V. A.
Issue Date: 2013
Citation: Synthesis of polyampholyte microgels from colloidal salts of pectinic acid and their application as pH-responsive emulsifiers / M. A. Mironov, I. D. Shulepov, V. S. Ponomarev [et al.] // Colloid and Polymer Science. — 2013. — Vol. 291. — № 7. — P. 1683-1691.
Abstract: A novel method for obtaining cross-linked microgels of apple pectin has been introduced. This method is based on the Ugi four-component condensation in colloidal suspensions of pectinic acid and amines. Using various processing parameters (the polysaccharide concentration, the type and density of crosslink, and the optimal pH range), particles with controlled colloidal properties have been obtained. Lightly cross-linked polysaccharide chains acquire anionic character due to deprotonation of the carboxyl groups at pH 9-10. Increasing the degree of cross-linking leads to a polyampholyte microgel, which can be protonated in acidic medium or deprotonated in basic medium. Polyampholyte microgels derived from apple pectin have proved to be an effective Pickering emulsifier at low concentrations and pH 2-3, forming stable oil-in-water emulsions. These Pickering emulsions exhibited pH-responsive behavior: raising the solution pH to 10 resulted in immediate demulsification due to the destabilization of microgel network at the oil-water interface. © 2013 Springer-Verlag Berlin Heidelberg.
Keywords: APPLE PECTIN
COLLOIDS
EMULSION
MICROGEL
PECTINIC ACID
UGI REACTION
APPLE PECTIN
COLLOIDAL PROPERTIES
COLLOIDAL SUSPENSIONS
DEGREE OF CROSS-LINKING
MICROGEL
OIL-IN-WATER EMULSIONS
PROCESSING PARAMETERS
UGI REACTION
COLLOIDS
EMULSIFICATION
EMULSIONS
FRUITS
GELS
SUSPENSIONS (FLUIDS)
AMINE
CARBOXYL GROUP
EMULSIFYING AGENT
OIL
PECTIN
PECTINIC ACID
POLYSACCHARIDE
UNCLASSIFIED DRUG
WATER
APPLE
ARTICLE
CHEMICAL STRUCTURE
CONCENTRATION (PARAMETERS)
CROSS LINKING
EMULSION
GEL
PARTICLE SIZE
PH
POLYAMPHOLYTE MICROGEL
POLYMERIZATION
PRIORITY JOURNAL
SYNTHESIS
ZETA POTENTIAL
URI: http://hdl.handle.net/10995/27476
SCOPUS ID: 84879416642
WOS ID: 000320578000015
PURE ID: 899369
ISSN: 0303-402X
DOI: 10.1007/s00396-013-2903-3
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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