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Walid Oueslati

University of Carthage Tunisia

Dr. Walid Oueslati, Ph.D., HU, is an Associate Professor in the Physics Department at the , Faculty of Sciences of Bizerte, University of Carthage, Tunisia, and a dedicated member of the Resources, Materials, and Ecosystems research Lab. His multidisciplinary expertise includes hydrogeology, groundwater science, and sustainable water management. With a profound background in experimental physics, materials science, and mineralogy, Dr. Oueslati brings analytical and modeling skills essential for groundwater research. His proficiency in crystallography and solid-state physics, complemented by expertise in X-ray powder diffraction structure analysis, uniquely positions him to investigate the complex hydrogeological systems. Currently, Dr. Oueslati's research activities align with his strong competency in the preparation and structural characterization of hybrid materials. His synthesis of nanomaterials and innovative use of clay nanofillers in clay/polymer nanocomposites showcase his commitment to sustainable water treatment technologies. Additionally, his exploration of phyllosilicate substrates and materials with a perovskite structure reflects a keen understanding of geological and hydrogeological complexities. Dr. Oueslati's extensive experience and diverse skill set make him an invaluable contributor to the advancement of groundwater science and its intersection with materials research.

1books edited

1chapters authored

Latest work with IntechOpen by Walid Oueslati

Nanoclays, currently regarded as nanomaterials with sustainable characteristics, have a variety of intriguing properties. Clays come in a wide variety of nanoscale morphologies and are chemically made up of hydrated aluminum silicates with varying amounts of additional elements like magnesium, iron, calcium, and potassium. Given their properties and accessibility in a variety of nanoscale morphologies, nanoclays are well suited for a broad range of possible uses. To create nanocomposite materials with specific characteristics and particular functionalities, composites based on polymers and clay nanoparticles have been thoroughly investigated. Recent research has demonstrated the use of polymer/nanoclay systems in the antibacterial coating, smart food packaging, drug delivery systems, tissue engineering, reinforced bioplastics, and flame-retardant materials. However, further study is still required to clarify their structure-property relationships. Hybrid organic/inorganic clays generate a wide number of perspectives, nanoarchitectures and materials. In general, the utilization of nanoclays can remove the typical cost barrier associated with nanotechnologies and provide new, sustainable pathways. The contributions that describe recent research in nanoclay science for technological applications are collected in this edited volume.

Nanoclay

Nanoclay

Edited by Walid Oueslati

Chapters authored

X-ray Diffraction Profiles Modeling Method for Layered Structures Reconstruction: Nanoclay Structural Verification

By Walid Oueslati, Chadha Mejri and Abdesslem Ben Haj Amara

The nanoclay properties find a large environmental application domain as depolluant, ion exchanger, natural geological barrier for industrial and radioactive waste confinement, clay-based nanocomposite for drug delivery, and more. Layered materials, such as nanoclay, present rather complex structures whose classical characterization requires a complementarity between several analysis methods to decipher the effects of interstratification (and its cause) on the intrinsic functional properties. The appearance of defects related to the layers stacking mode, which differ in their thickness and/or their internal structure are directly related to the reactivity of the mineral’s surface. During the last decades, and with the development of computer codes, the modeling of X-ray diffraction profiles has proven to be an important tool that allows detailed structural reconstruction. The quantitative XRD analysis, which consists of the comparison of experimental (00l) reflections with the calculated ones deduced from structural models, allowed us to determine the optimal structural parameters describing interlamellar space (IS) configuration, hydration state, cation exchange capacity (CEC), layer stacking mode, and theoretical mixed-layer structure (MLS) distribution. This chapter will review the state of the art of this theoretical approach as a basic technique for the study of nanoclays. The basic mathematical formalism, the parameters affecting the theoretical models, and the modeling strategy steps will be detailed in concrete examples.

Part of the book: Nanoclay

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