Sorption of water vapor, hydration, and viscosity of carboxymethylhydroxypropyl guar, diutan, and xanthan gums, and their molecular association with and without salts (NaCl, CaCl2, HCOOK, CH3COONa, (NH4)2SO4 and MgSO4) in aqueous solution

Sorption of water vapor, hydration, and viscosity of carboxymethylhydroxypropyl guar, diutan, and xanthan gums, and their molecular association with and without salts (NaCl, CaCl2, HCOOK, CH3COONa, (NH4)2SO4 and MgSO4) in aqueous solution

Gums are routinely used in food industry, pharmacy and oil recovery process. In these uses, the hydrocolloids very often encounter interactions with salts at moderate to high temperature. Since they are normally employed in the form of solution and gel, their viscous or fluidity properties need deta...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1991. - 25(2009), 19 vom: 06. Okt., Seite 11647-56
1. Verfasser: Banerjee, Paltu (VerfasserIn)
Weitere Verfasser: Mukherjee, Indrajyoti, Bhattacharya, Subhash, Datta, Sidhhartha, Moulik, Satya P, Sarkar, Diptabhas
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2009
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Calcium Compounds Chromates Galactans Mannans Plant Gums Polysaccharides, Bacterial Salts Solutions mehr... carboxymethyl guar gum Water 059QF0KO0R Sodium Chloride 451W47IQ8X Sodium Acetate 4550K0SC9B Magnesium Sulfate 7487-88-9 calcium chromate(VI) J1FGH4ZJ4M Potassium Acetate M911911U02 Ammonium Sulfate SU46BAM238 xanthan gum TTV12P4NEE
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245 1 0 |a Sorption of water vapor, hydration, and viscosity of carboxymethylhydroxypropyl guar, diutan, and xanthan gums, and their molecular association with and without salts (NaCl, CaCl2, HCOOK, CH3COONa, (NH4)2SO4 and MgSO4) in aqueous solution 
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520 |a Gums are routinely used in food industry, pharmacy and oil recovery process. In these uses, the hydrocolloids very often encounter interactions with salts at moderate to high temperature. Since they are normally employed in the form of solution and gel, their viscous or fluidity properties need detailed investigation. In the present work, properties such as water vapor adsorption of finely powdered carboxymethylhydroxypropyl derivatized guar (CMHPG) as well as xanthan (Xn) and diutan (Dn) gums, their hydration in solution, their viscosity behaviors, and salt effects on fluidity have been studied. The concentration domains for the existence of free and associated molecules in the studied solutions have been assessed from the viscosity results. The gums have been found to bind a fair amount of water from the vapor phase with them. In solution, they can interact and arrest a large amount of water in their folded configuration. Intrinsic viscosities of the gums in aqueous medium declined in the presence of salts. The activation energies for their viscous flow were moderate and comparable, and were dependent on their concentrations. From the power law relation and viscosity master curve behavior mostly two critical association states of the macromolecular dispersions were envisaged 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
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650 7 |a Chromates  |2 NLM 
650 7 |a Galactans  |2 NLM 
650 7 |a Mannans  |2 NLM 
650 7 |a Plant Gums  |2 NLM 
650 7 |a Polysaccharides, Bacterial  |2 NLM 
650 7 |a Salts  |2 NLM 
650 7 |a Solutions  |2 NLM 
650 7 |a carboxymethyl guar gum  |2 NLM 
650 7 |a Water  |2 NLM 
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650 7 |a Magnesium Sulfate  |2 NLM 
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650 7 |a calcium chromate(VI)  |2 NLM 
650 7 |a J1FGH4ZJ4M  |2 NLM 
650 7 |a Potassium Acetate  |2 NLM 
650 7 |a M911911U02  |2 NLM 
650 7 |a Ammonium Sulfate  |2 NLM 
650 7 |a SU46BAM238  |2 NLM 
650 7 |a xanthan gum  |2 NLM 
650 7 |a TTV12P4NEE  |2 NLM 
700 1 |a Mukherjee, Indrajyoti  |e verfasserin  |4 aut 
700 1 |a Bhattacharya, Subhash  |e verfasserin  |4 aut 
700 1 |a Datta, Sidhhartha  |e verfasserin  |4 aut 
700 1 |a Moulik, Satya P  |e verfasserin  |4 aut 
700 1 |a Sarkar, Diptabhas  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Langmuir : the ACS journal of surfaces and colloids  |d 1991  |g 25(2009), 19 vom: 06. Okt., Seite 11647-56  |w (DE-627)NLM098181009  |x 1520-5827  |7 nnns 
773 1 8 |g volume:25  |g year:2009  |g number:19  |g day:06  |g month:10  |g pages:11647-56 
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