Shear-thinning and viscosity synergism in mixed solution of guar gum and its etherified derivatives

Wu, Meng

doi:10.1007/s00289-009-0127-y

Cited by 11 publications

(7 citation statements)

References 23 publications

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“…This is due to the incorporated POSS molecules that are physically embedded within the polymeric network, which is supported by the FT-IR (Fig. 1) and 29 Si NMR data (Fig.2).…”

Section: 9selectivity Of Bio-nanocomposite Membranessupporting

confidence: 55%

“…One of the membranes prepared was subjected to the solid-state 29 Si CP/MAS NMR experiment in order to confirm the binding of POSS molecules with the polymer matrix and the resulting spectrum is shown in Fig. 2.…”

Section: Si Solid-state Cp/mas Nmr Spectroscopymentioning

confidence: 99%

“…25 POSS molecules embody a truly hybrid inorganic core/organic shell architecture that are naturally compatible with organic hosts, such as renewable resources 26,27 and natural biomaterials. 28,29 In addition, it can be functionalized with various groups attached to the 4 apex silicon atoms, which provides good compatibility with diverse polymer matrices on a molecular level. 30,31 In this manner, a large diversity of POSS-polymer architectures is possible.…”

Section: Introductionmentioning

confidence: 99%

“…The successful dispersion of POSS into polymeric matrices depends on the surface interactions of POSS via (e.g. van der Waals, strong hydrogen bonding 29 ) with polymers.…”

Section: Introductionmentioning

confidence: 99%

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Polyhedral oligomeric silsesquioxane/polyamide bio-nanocomposite membranes: structure-gas transport properties

et al. 2015

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Abstract:A series of bio-nanocomposite membranes based on different loadings of polyhedral oligomeric silsesquioxane (POSS) and dimer fatty acid polyamide was prepared by facile solution casting method and their gas-transport properties were evaluated using oxygen, Considerable influence of POSS on the glass transition temperature of the bio-nanocomposite membranes was observed. Increasing the POSS content decreased the free volume and increased the density of the membranes. These properties can be used to determine the permeability and selectivity of the membranes prepared.

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“…This is due to the incorporated POSS molecules that are physically embedded within the polymeric network, which is supported by the FT-IR (Fig. 1) and 29 Si NMR data (Fig.2).…”

Section: 9selectivity Of Bio-nanocomposite Membranessupporting

confidence: 55%

Section: Si Solid-state Cp/mas Nmr Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The successful dispersion of POSS into polymeric matrices depends on the surface interactions of POSS via (e.g. van der Waals, strong hydrogen bonding 29 ) with polymers.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Polyhedral oligomeric silsesquioxane/polyamide bio-nanocomposite membranes: structure-gas transport properties

et al. 2015

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“…The structure of this polysaccharide includes a flexible, extended coil that presents no conformational changes when subjected to temperature variations (Lapasin and Pricl, 1995), but is slightly affected by the pH and ion concentration, presenting shear thinning behavior in aqueous solution, even at low concentrations (Wang et al, 2000). This gum has been extensively used as a thickening and stabilizing agent in many sectors of food and other industries (Wu, 2009).…”

Section: Introductionmentioning

confidence: 99%

Dynamic and steady: shear rheological properties of xanthan and guar gums dispersed in yellow passion fruit pulp (Passiflora edulis f. flavicarpa)

Moraes

Fasolin

Cunha

et al. 2011

Braz. J. Chem. Eng.

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-Yellow passion fruit pulp is unstable, presenting phase separation that can be avoided by the addition of hydrocolloids. For this purpose, xanthan and guar gum [0.3, 0.7 and 1.0% (w/w)] were added to yellow passion fruit pulp and the changes in the dynamic and steady-shear rheological behavior evaluated. Xanthan dispersions showed a more pronounced pseudoplasticity and the presence of yield stress, which was not observed in the guar gum dispersions. Cross model fitting to flow curves showed that the xanthan suspensions also had higher zero shear viscosity than the guar suspensions, and, for both gums, an increase in temperature led to lower values for this parameter. The gums showed different behavior as a function of temperature in the range of 5-35 o C. The activation energy of the apparent viscosity was dependent on the shear rate and gum concentration for guar, whereas for xanthan these values only varied with the concentration. The mechanical spectra were well described by the generalized Maxwell model and the xanthan dispersions showed a more elastic character than the guar dispersions, with higher values for the relaxation time. Xanthan was characterized as a weak gel, while guar presented a concentrated solution behavior. The simultaneous evaluation of temperature and concentration showed a stronger influence of the polysaccharide concentration on the apparent viscosity and the G' and G" moduli than the variation in temperature.

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Effects of pectin and guar gum on creaming stability, microstructure and rheology of egg yolk plasma-stabilized emulsions

Erçelebi

İbanoğlu

2010

Eur Food Res Technol

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Shear-thinning and viscosity synergism in mixed solution of guar gum and its etherified derivatives

Cited by 11 publications

References 23 publications

Polyhedral oligomeric silsesquioxane/polyamide bio-nanocomposite membranes: structure-gas transport properties

Polyhedral oligomeric silsesquioxane/polyamide bio-nanocomposite membranes: structure-gas transport properties

Dynamic and steady: shear rheological properties of xanthan and guar gums dispersed in yellow passion fruit pulp (Passiflora edulis f. flavicarpa)

Effects of pectin and guar gum on creaming stability, microstructure and rheology of egg yolk plasma-stabilized emulsions

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