Characterization of starch and its mono and hybrid derivatives by thermal analysis and FT-IR spectroscopy

Capek, Peter; Drábik, M.; Turjan, J.

doi:10.1007/s10973-009-0194-1

Cited by 35 publications

(21 citation statements)

References 22 publications

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“…Furthermore, according to the literature, a carboxymethyl group had hydrophilic character, which led to decreased thermal stability of microgels. These results were consistent with the previous study, in which carboxymethylation decreased the thermal stability of wheat starch and α‐cyclodextrin . The residual masses at 600°C for the microgels with different R β‐CD/CMS were higher than those from CMS and β‐CD, which might have been due to reaction of STMP with CMS and β‐CD resulting in the incorporation of phosphorus into the microgels .…”

Section: Resultssupporting

confidence: 92%

Rheological characterization of pH‐responsive carboxymethyl starch/β‐cyclodextrin microgels

et al. 2015

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Carboxymethyl starch (CMS)/b-cyclodextrin (b-CD) microgels with pH and ionic strength sensitivities have been synthesized by chemical crosslinking. The characterization of microgels was investigated by thermogravimetric analysis, zeta potential measurements, swelling, and rheological analyses. Thermogravimetric analysis data showed that the initial degradation temperature of microgels was higher than that of CMS, but lower than that of b-CD. The zeta potentials of microgels decreased with increasing weight ratio R b-CD/CMS and ionic strength, but increased with increasing pH. The swelling degree of microgels showed an abrupt increase in the pH range 3-6 due to the ionization of carboxylic groups, and then remained almost constant. However, it decreased with increasing ionic strength. Viscosity results revealed that all samples exhibited non-Newtonian shear-thinning behavior. All microgels exhibited dominant elastic behavior over the entire frequency range with polymer concentrations of 7%. These results suggested that the properties of microgels could be controlled by pH and ionic strength.

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Section: Resultssupporting

confidence: 92%

Rheological characterization of pH‐responsive carboxymethyl starch/β‐cyclodextrin microgels

et al. 2015

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“…Due to these properties, the preparation of various synthetic polysaccharide sulfates has generated interest along with the utilization of natural compounds. Sulfate derivatives have been prepared from many starch species , cellulose , dextran , pullulan , curdlan , chitin , chitosan , pectin , and alginate . Furthermore, sulfation reactions have also been carried out on natural polysaccharide sulfates .…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic study of natural and synthetic polysaccharide sulfate structures

et al. 2016

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Sulfate-containing polysaccharides are a diverse group of natural products and many of them have shown biological activity. Therefore, a growing interest has focused on the chemical preparation of sulfated derivatives from common polysaccharides. The analysis of these complicated, synthetically prepared polysaccharide sulfates typically requires the utilization of several methods. NMR and IR spectroscopy are routinely used to follow the progress of the sulfation reactions and to confirm the presence of covalently bonded sulfate groups in the products.

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“…Furthermore, the process of eliminating water adsorbed on the starch macromolecules from the sample CMS-Na is confirmed by the change of intensity of band near the wavenumber 1643 cm -1 , which disappears completely above 120°C [21,22].…”

Section: Spectroscopic Analysismentioning

confidence: 79%

Thermal decomposition of binder based on etherified starch to use in foundry industry

Kaczmarska

Grabowska

Grabowski

et al. 2017

J Therm Anal Calorim

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In this work, the main purpose was the determination of the thermal stability of the modified starch: sodium carboxymethyl starch (CMS-Na) used in foundry technology as organic binder for molding sand. The analysis of the course of decomposition of the starch material under controlled heating in the range of 20-500°C was based on the results of thermal analysis methods (TG, DTG, DSC) in combination with the results of spectroscopic technology (DRIFT). The use of various methods of thermal analysis and spectroscopic methods was possible to determine more entirely the mechanism of the binder decomposition process comprising reactions at the molecular level with regard to the conditions prevailing in the mold. The onset temperature of degradation of the binder and at the same time the temperature at which it begins to lose binding properties were determined. It was found that the mechanism of the binder is multistage process. The decomposition of the starch binder CMS-Na involves the gradual evaporation of the water bound at a temperature of 20-120°C and water constitutional starch in the range of 120-200°C, degradation of the binder in the temperature range 200-342°C by breaking the glycosidic bonds in the polymer chains with the formation of volatile compounds and finally detaching the side groups and partial combustion of the starch material within a temperature range 342-500°C.

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Characterization of starch and its mono and hybrid derivatives by thermal analysis and FT-IR spectroscopy

Cited by 35 publications

References 22 publications

Rheological characterization of pH‐responsive carboxymethyl starch/β‐cyclodextrin microgels

Rheological characterization of pH‐responsive carboxymethyl starch/β‐cyclodextrin microgels

Spectroscopic study of natural and synthetic polysaccharide sulfate structures

Thermal decomposition of binder based on etherified starch to use in foundry industry

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