Abstract A novel carboxymethylcellulose (CMC)–
hydroxyethylcellulose (HEC)-based hydrogel with
sensitivity to environmental changes, pH and salts
was synthesized by using fumaric acid and malic acid
at various concentrations. Water uptake capacity of
hydrogels was investigated in distilled water, various
salt and pH solutions. From pH-dependent studies, it
was found that greater water uptake values were
observed at greater pH values (7.4), and reversible pH
responsiveness of CMC–HEC based hydrogels was
obtained. Decreasing the water uptake capacity with
increasing of the charge of the metal cation
(Al3?Ca2?Na?) demonstrated metal ion
responsiveness of CMC–HEC-based hydrogels. From
tensile tests of the hydrogels, a greater crosslinker
concentration led to greater tensile strength values.
Thermogravimetric analysis and scanning electron
microscopy images were used to determine the
thermal stability and to observe morphological properties
of the samples, respectively.
Abstract A novel carboxymethylcellulose (CMC)–hydroxyethylcellulose (HEC)-based hydrogel withsensitivity to environmental changes, pH and saltswas synthesized by using fumaric acid and malic acidat various concentrations. Water uptake capacity ofhydrogels was investigated in distilled water, varioussalt and pH solutions. From pH-dependent studies, itwas found that greater water uptake values wereobserved at greater pH values (7.4), and reversible pHresponsiveness of CMC–HEC based hydrogels wasobtained. Decreasing the water uptake capacity withincreasing of the charge of the metal cation(Al3?Ca2?Na?) demonstrated metal ionresponsiveness of CMC–HEC-based hydrogels. Fromtensile tests of the hydrogels, a greater crosslinkerconcentration led to greater tensile strength values.Thermogravimetric analysis and scanning electronmicroscopy images were used to determine thethermal stability and to observe morphological propertiesof the samples, respectively.
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