Published in Nov-2026.

Citations

PDF vol: 21 Art-120 pag: 1-7.

https://doi.org/10.34294/j.jsta.26.21.120

The contamination of water resources by metal ions has highlighted the need for efficient technologies and novel materials for the in situ retention and monitoring of contaminants, which are both low-cost and environmentally friendly. This study aims to develop surfaces for the retention of metallic contaminants in aqueous media. The approach involves the insertion of EDTA onto microporous cellulose surfaces. The surfaces were formed by functionalizing cellulose with diisocyanates, such as MDI, in the first stage, providing -NCO groups available for EDTA insertion in the second stage through their -COOH groups. The materials were characterized using Fourier Transform Infrared Spectroscopy coupled with Attenuated Total Reflectance (FTIR-ATR), Thermogravimetric Analysis (TGA), and Differential Scanning Calorimetry (DSC). FTIR-ATR spectra results confirmed successful material formation. In the first stage, bands associated with the tension vibration of the free -NCO and carbonyl of the Cellulose-OCONHR' group appeared at 2258 cm⁻¹ and 1637 cm⁻¹, respectively. In the second stage, the band associated with the vibrations of the C=O showed greater intensity and overlap in the region of 1700 cm⁻¹ to 1600 cm⁻¹, attributed to the amide bond. Additionally, a band at 1400 cm⁻¹ was observed, attributed to the vibration of the -COO- groups of EDTA. TGA and DSC further demonstrated different thermal behaviors, indicating successful functionalization. The results show that the functionalization of the surfaces was successfully achieved using the layer-by-layer technique, resulting in functionalized surfaces with terminal EDTA-type pincers.

Garces-Villegas V, Palencia M, Mera-Erazo J, Chate-Galvis N.G, Medellín-Fernández E.J, Anaya-Tatis L, (2026), Making of cellulose active surfaces through layer-by-layer technique: MDI-EDTA bilayer, J. Sci. Technol. Appl., 21, 1-7. https://doi.org/10.34294/j.jsta.26.21.120

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