Viscoelastic properties of dibenzylidene sorbitol (DBS) physical gels at high frequencies

被引：8

作者：

Santos, Paulo S. ^{[2
]}

Abiad, Mohamad G. ^{[1
]}

Carignano, Marcelo A. ^{[3
]}

Campanella, Osvaldo H. ^{[2
]}

机构：

[1] Amer Univ Beirut, Fac Agr & Food Sci, Dept Nutr & Food Sci, Beirut, Lebanon

[2] Purdue Univ, Dept Agr & Biol Engn, W Lafayette, IN 47907 USA

[3] Northwestern Univ, Life Proc Inst, Dept Biomed Engn & Chem, Evanston, IL 60208 USA

来源：

RHEOLOGICA ACTA | 2012年 / 51卷 / 01期

关键词：

Dibenzylidene D-sorbitol (DBS); Physical gel; Viscoelasticity; Rheology; Oscillatory squeezing flow; BENZYLIDENE-D-SORBITOL; COLLOIDAL PARTICLES; DENTAL COMPOSITES; SQUEEZING FLOW; 1,3/2,4-DIBENZYLIDENE-D-SORBITOL; DERIVATIVES; ORGANOGELS; CRYSTALS; BEHAVIOR; POLARITY;

D O I：

10.1007/s00397-011-0591-9

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The rheological behavior of Dibenzylidene D-Sorbitol (DBS) gels formed in ethylene glycol, glycerol, mineral oil, ethanol, and chlorobenzene was studied using oscillatory squeezing flow viscometry. The storage (G') and loss (G '') moduli were measured as a function of gellant concentration (0.5-2 w/w) and type of solvent. As expected greater values of gel strength (G') were observed for gels containing higher concentrations of DBS. In addition, both storage and loss moduli of 2% systems were mostly frequency independent over the studied range, whereas 0.5% gels did exhibit some degree of dependence. We also found that the solvent plays an important role in the properties of the gels. Among the parameters that affect the viscoelastic properties of DBS gels, the solvent polarity and its ability to form hydrogen bonding may have significant effects on the gel rheology.

引用

页码：3 / 11

页数：9

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