Comparison of concentration dependence of mechanical modulus in two biopolymer gel systems using scaling analysis

Hakjung Kim, Byong Yong Kim, Sundaram Gunasekaran, Jae Won Park, Won Byong Yoon

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Concentration dependence of mechanical modulus of two biopolymer systems, i.e., xanthan-locust bean (X/L) mixture and fish muscle protein (surimi) was evaluated and compared at a wide range of polymer concentrations. A small amplitude oscillatory shear test was performed to measure changes in storage (G′) modulus during gelation and after gelation. Critical concentration (Cc) of the X/L mixture and surimi gel was determined to be 0.15 g/100 mL of solvent and 2.04 g/100 g of solvent, respectively. Reduced concentration (CR=CL/Cc) was used to compare the power-law dependence of modulus of the two systems. The elasticity exponent of the X/L mixture and surimi gel was determined to be 2.4 and 1.97, respectively. The concentration dependence of two biopolymer gel systems such as physical gels (X/L) and chemicals gels (fish muscle protein) theoretically demonstrated that the difference of flexibility of junctions in the networks might distinguish the elasticity of each gel.

Original languageEnglish
Pages (from-to)1601-1606
Number of pages6
JournalFood Science and Biotechnology
Volume22
Issue number6
DOIs
Publication statusPublished - 2013

Keywords

  • concentration dependence
  • elastic exponent
  • gel
  • surimi, xanthan and locust bean

ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Applied Microbiology and Biotechnology

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