Detail publikačního výsledku

ATR-FTIR spectroscopy and thermogravimetry characterization of water in polyelectrolyte-surfactant hydrogels

ENEV, V.; SEDLÁČEK, P.; JARÁBKOVÁ, S.; VELCER, T.; PEKAŘ, M.

Originální název

ATR-FTIR spectroscopy and thermogravimetry characterization of water in polyelectrolyte-surfactant hydrogels

Anglický název

ATR-FTIR spectroscopy and thermogravimetry characterization of water in polyelectrolyte-surfactant hydrogels

Druh

Článek WoS

Originální abstrakt

Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and thermogravimetric analysis (TGA) were evaluated as useful techniques to study bulk and hydration water in hydrogels. Hydrogels formed by cationized dextran (DEAE-dextran) and anionic surfactants were used as model materials. The IR technique was applied both on fresh samples and on dehydrating samples during the evaporation process. Not only overall IR spectra but especially the deconvoluted OH band was used in the analysis. IR spectroscopy was shown to provide especially structural information which is nicely complemented by the mainly quantitative data provided by TGA. Significant differences between the dehydration processes for the model gels with different surfactants were revealed. The DEAE-dextran-based hydrogels were characterized by a continuous step dehydration with different drying rates in the initial evaporation period. Three different water subpopulations were identified in all model hydrogel samples. Water molecules in these hydrogels containing a higher concentration of surfactants demonstrated a more ordered hydrogen network, which was formed by subpopulations of pentamers, tetramers and/or distorted pentamers.

Anglický abstrakt

Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and thermogravimetric analysis (TGA) were evaluated as useful techniques to study bulk and hydration water in hydrogels. Hydrogels formed by cationized dextran (DEAE-dextran) and anionic surfactants were used as model materials. The IR technique was applied both on fresh samples and on dehydrating samples during the evaporation process. Not only overall IR spectra but especially the deconvoluted OH band was used in the analysis. IR spectroscopy was shown to provide especially structural information which is nicely complemented by the mainly quantitative data provided by TGA. Significant differences between the dehydration processes for the model gels with different surfactants were revealed. The DEAE-dextran-based hydrogels were characterized by a continuous step dehydration with different drying rates in the initial evaporation period. Three different water subpopulations were identified in all model hydrogel samples. Water molecules in these hydrogels containing a higher concentration of surfactants demonstrated a more ordered hydrogen network, which was formed by subpopulations of pentamers, tetramers and/or distorted pentamers.

Klíčová slova

hydration, hydrogels, infrared spectroscopy, thermogravimetry, water

Klíčová slova v angličtině

hydration, hydrogels, infrared spectroscopy, thermogravimetry, water

Autoři

ENEV, V.; SEDLÁČEK, P.; JARÁBKOVÁ, S.; VELCER, T.; PEKAŘ, M.

Rok RIV

2020

Vydáno

06.05.2019

ISSN

0927-7757

Periodikum

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

Svazek

575

Číslo

1

Stát

Nizozemsko

Strany od

1

Strany do

9

Strany počet

9

URL

https://doi.org/10.1016/j.colsurfa.2019.04.089

BibTex

@article{BUT157292,
  author="Vojtěch {Enev} and Petr {Sedláček} and Sabína {Jarábková} and Tomáš {Velcer} and Miloslav {Pekař}",
  title="ATR-FTIR spectroscopy and thermogravimetry characterization of water in polyelectrolyte-surfactant hydrogels",
  journal="COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS",
  year="2019",
  volume="575",
  number="1",
  pages="1--9",
  doi="10.1016/j.colsurfa.2019.04.089",
  issn="0927-7757",
  url="https://doi.org/10.1016/j.colsurfa.2019.04.089"
}