Swelling behavior of covalently cross-linked gellan gels

Masahiko Annaka, Yuko Ogata, Takayuki Nakahira

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The equilibrium swelling behaviors of covalently cross-linked gellan gels were investigated as a function of electrolyte concentration, pH at various ionic strengths. A marked decrease in the degree of swelling is observed when the gels are exposed to an aqueous salt solution, and to low and high pH. A hysteresis that observed for the gel in aqueous SrCl2 solution may be attributed to strong interactions with glucuronate, introducing additional cross links which affect the elasticity and ionic swelling power of the gel. The numerical analysis of the Flory theory applied to the swelling of gels shows that the ionic contribution to swelling is the main factor determining the degree of swelling of the gels. Volume change in aqueous solution may be explained mainly by the ionic contribution to swelling. Continuous volume change in the gel is attributed to the high stiffness of polymer chains and the Donnan equilibrium.

Original languageEnglish
Pages (from-to)6755-6760
Number of pages6
JournalJournal of Physical Chemistry B
Volume104
Issue number29
Publication statusPublished - Jul 27 2000
Externally publishedYes

Fingerprint

swelling
Swelling
Gels
gels
aqueous solutions
Glucuronic Acid
gellan gum
Ionic strength
Electrolytes
numerical analysis
Hysteresis
Numerical analysis
Elasticity
stiffness
Polymers
elastic properties
Salts
hysteresis
Stiffness
electrolytes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Swelling behavior of covalently cross-linked gellan gels. / Annaka, Masahiko; Ogata, Yuko; Nakahira, Takayuki.

In: Journal of Physical Chemistry B, Vol. 104, No. 29, 27.07.2000, p. 6755-6760.

Research output: Contribution to journalArticle

Annaka, M, Ogata, Y & Nakahira, T 2000, 'Swelling behavior of covalently cross-linked gellan gels', Journal of Physical Chemistry B, vol. 104, no. 29, pp. 6755-6760.
Annaka, Masahiko ; Ogata, Yuko ; Nakahira, Takayuki. / Swelling behavior of covalently cross-linked gellan gels. In: Journal of Physical Chemistry B. 2000 ; Vol. 104, No. 29. pp. 6755-6760.
@article{c1d8178f473143b6ac18358511568c71,
title = "Swelling behavior of covalently cross-linked gellan gels",
abstract = "The equilibrium swelling behaviors of covalently cross-linked gellan gels were investigated as a function of electrolyte concentration, pH at various ionic strengths. A marked decrease in the degree of swelling is observed when the gels are exposed to an aqueous salt solution, and to low and high pH. A hysteresis that observed for the gel in aqueous SrCl2 solution may be attributed to strong interactions with glucuronate, introducing additional cross links which affect the elasticity and ionic swelling power of the gel. The numerical analysis of the Flory theory applied to the swelling of gels shows that the ionic contribution to swelling is the main factor determining the degree of swelling of the gels. Volume change in aqueous solution may be explained mainly by the ionic contribution to swelling. Continuous volume change in the gel is attributed to the high stiffness of polymer chains and the Donnan equilibrium.",
author = "Masahiko Annaka and Yuko Ogata and Takayuki Nakahira",
year = "2000",
month = "7",
day = "27",
language = "English",
volume = "104",
pages = "6755--6760",
journal = "Journal of Physical Chemistry B",
issn = "1520-6106",
number = "29",

}

TY - JOUR

T1 - Swelling behavior of covalently cross-linked gellan gels

AU - Annaka, Masahiko

AU - Ogata, Yuko

AU - Nakahira, Takayuki

PY - 2000/7/27

Y1 - 2000/7/27

N2 - The equilibrium swelling behaviors of covalently cross-linked gellan gels were investigated as a function of electrolyte concentration, pH at various ionic strengths. A marked decrease in the degree of swelling is observed when the gels are exposed to an aqueous salt solution, and to low and high pH. A hysteresis that observed for the gel in aqueous SrCl2 solution may be attributed to strong interactions with glucuronate, introducing additional cross links which affect the elasticity and ionic swelling power of the gel. The numerical analysis of the Flory theory applied to the swelling of gels shows that the ionic contribution to swelling is the main factor determining the degree of swelling of the gels. Volume change in aqueous solution may be explained mainly by the ionic contribution to swelling. Continuous volume change in the gel is attributed to the high stiffness of polymer chains and the Donnan equilibrium.

AB - The equilibrium swelling behaviors of covalently cross-linked gellan gels were investigated as a function of electrolyte concentration, pH at various ionic strengths. A marked decrease in the degree of swelling is observed when the gels are exposed to an aqueous salt solution, and to low and high pH. A hysteresis that observed for the gel in aqueous SrCl2 solution may be attributed to strong interactions with glucuronate, introducing additional cross links which affect the elasticity and ionic swelling power of the gel. The numerical analysis of the Flory theory applied to the swelling of gels shows that the ionic contribution to swelling is the main factor determining the degree of swelling of the gels. Volume change in aqueous solution may be explained mainly by the ionic contribution to swelling. Continuous volume change in the gel is attributed to the high stiffness of polymer chains and the Donnan equilibrium.

UR - http://www.scopus.com/inward/record.url?scp=0034226504&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034226504&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0034226504

VL - 104

SP - 6755

EP - 6760

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

SN - 1520-6106

IS - 29

ER -