فهرست مطالب عباس دادخواه تهرانی

Nowadays, supramolecular hydrogels as a new type of three-dimensional compounds based on non-covalent interactions have attracted the attention of many scientists of different sciences due to their diverse and easy preparation methods and unique characteristics compared to their covalent counterparts. Therefore, in the present research, green cellulose nanoparticles was prepared from cotton by acid hydrolysis process and then separately functionalized with citric acid and pyridine pendant groups in order to create anionic and cationic components. Next, supramolecular hydrogels were prepared through electrostatic interactions between the mentioned components. The successful preparation of hydrogel was investigated using Fourier transform infrared spectroscopy, SEM and X-ray diffraction. Study of the morphology of the hydrogel showed a porous structure containing holes of different sizes. Also, the investigation of the crystal structure of the hydrogel showed its high crystallinity. Finally, the removal of methylene blue cationic dye from industrial wastewater was investigated through the absorption process and using the prepared hydrogel as an adsorbent. Also, the effect of methylene blue initial concentration and contact time at room temperature on the absorption process was investigated. The study of absorption kinetics showed that the absorption process follows the second-order absorption kinetics. The maximum absorption capacity obtained for this adsorbent was 97 mg/g. The present study showed that the prepared supramolecular hydrogel, in addition to features such as biocompatibility, avalability, and simple and fast preparation, has a good potential for methylene blue absorption.