Ph.D. (Doctor of Philosophy)
Department of Chemistry and Biochemistry
Chemistry; Inorganic chemistry; Organic chemistry; Nanotechnology
Application of Nanomaterials using nanotechnology has gained significant attention in the coating industry in recent years. Their application has had a great impact, particularly in the 3C industries (computer, communication, and construction). Incorporation of nanomaterials into polymer carriers through a systematic approach to coating processes can enhance various physical properties, such as mechanical, optical, electrical and thermal properties. The current dissertation focused on the synthesis and characterization of new nanomaterials like mesoporous silica or nanocomposites like copper-doped zinc oxide that can be used in the coating to study thermal cooling performance and enhancement of thermal conductivity. New thermal devices will be built using several ASTM processes to observe molecular fan effect on heat sinks. In addition to those, this dissertation covers the new formulation technique using inorganic/organic hybrid nanocomposite coatings for multi-functional purposes, such as heat dissipation, corrosion inhibition, and semiconductor applications. In the first project, we developed a thin inorganic/organic hybrid nanocomposite coating to study corrosion inhibition performance on metal alloys. In this project, we employed an in-situ phosphatization technique for corrosion protection and a 'Molecular Fan' technique to dissipate heat from metal alloys like aluminum/zinc/magnesium. Salt-Fog testing results show we can achieve good protection up to 722 hours. Our goal is to reach 1000 hours. The effect of using ISPR, nanomaterials, pigments etc. is discussed in this project. In the second project, we made polymer formulations composed of carbon-based nanomaterials exhibiting the Molecular Fan effect. In the first part, we studied its effect on heat sinks using an existing cooling device. In the second part, we designed, developed and built a new thermal device to study the Molecular Fan effect and compared and contrasted it with the existing one. We also tested its application on communication devices such as a cell phone. In the third project, we synthesized and studied a new type of nanomaterials 'Copper-doped Zinc Oxide' in two ways by the 'solvo-thermal' method and the 'precipitation' method. We discuss each process and its results in detail. We characterized the newly developed materials, studied their properties, and developed emulsion coating formulation and measured thermal performance. In the future, we propose to investigate the mechanical properties, optical properties such as photoluminescence of ZnO, and to find the best way for the possible application (photocatalyst). In the fourth project, we synthesized and characterized porous nanomaterials 'Mesoporous Silica' through an investigation of its physical properties. We formulated nanocoating using silica-based nanocomposite and studied its thermal performance.
Chakraborty, Sudeshna, "Multifunctional nanocomposites in coating technology : synthesis, characterization, formulation, evaluation and application" (2018). Graduate Research Theses & Dissertations. 4064.
Northern Illinois University
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