Abstract
Polymer matrix nanocomposites with nanosized fillers are becoming an inseparable part of various industries owing to their unique properties. Among the nanosized fillers, layered double hydroxides are a good candidate due to their fantastic properties such as the ability to ion exchange and adsorption capacity. In the present work, a simple and green synthesis procedure was applied for the preparation of novel modified Cu–Ca–Al-based layered double hydroxide/polymer matrix nanocomposites. Notably, the synthesis was performed in a water medium as solvent. The layered double hydroxide was synthesized and itaconic acid was used for the surface functionalization of the prepared material. The modified material was then incorporated into the natural polymer of gellan gum to produce polymer matrix nanocomposites with different filler contents. The prepared materials were characterized using infrared spectroscopy, X-ray diffraction analysis, scanning and transmission electron microscopy, X-ray diffraction analysis, thermogravimetric analysis, and N2 adsorption/desorption technique. After characterization, the prepared materials were used for the adsorption of Congo red. After investigation of the important experimental parameters, the isotherm and kinetic studies were also performed. Among the studied kinetic models, the pseudo-second-order model and intra-particle diffusion model were obtained the best in the case of Congo red adsorption. The Freundlich isotherm model showed the best results. Finally, maximum adsorption capacities of 80.9, 90.1, and 99.9 mg g−1 were obtained for nanocomposites containing 1%, 3%, and 5 wt% of filler, respectively.
Highlights
Polymer matrix nanocomposites with nanosized fillers are becoming an inseparable part of various industries owing to their unique properties
A simple and green synthesis procedure was used for the preparation of novel modified Cu–Ca–Al–Layered double hydroxides (LDHs)/polymer matrix nanocomposites
The modified material was incorporated into the natural polymer of gellan gum to produce polymer matrix nanocomposites with different filler contents
Summary
Polymer matrix nanocomposites with nanosized fillers are becoming an inseparable part of various industries owing to their unique properties. A novel nanocomposite based on modified Cu-Ca-Al-LDH and gellan gum was synthesized for adsorption purposes. The LDH was synthesized with a simple and green route and modified to improve compatibility with polymer matrix, surface area, adsorption properties, and other surface characteristics.
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