Preparation and characterization of decorative and heat insulating floor tiles for buildings roofs

Abstract

Since the beginning of the 5th century, people felt the urge to construct a sort of heat insulation system to their houses. This research paper focuses on the preparation, development and design of heat insulating tiles using materials like automobile tires powder and rice husk which are materials that are available at almost negligible costs and great amounts. Throughout this paper, experimental work will be provided to document, analyze and compare different insulating materials based on their thermal conductivity factor (K-factor), economic aspects, contribution to a greener earth, and mechanical properties. The results show that a mixture of used automobile tires powder and epoxy has a K factor of 0.0117 W/m°C, and that of a rice husk mixture with epoxy is 0.0118 W/m°C. These values are considerably lower than the K factor of the currently used polyurethane foam (which is 0.026 W/m°C), and therefore these mixtures are more efficient heat insulators than the currently used foam. Calculations have also shown that the manufacture of these mixtures cost 65% less than that of the polyurethane foam.

Synthesis and characterization of PVP based catalysts for selected application in catalysis

“…It was first been used as a substitution for blood plasma then it started to have more and a variety of applications and uses. PVP is dissolvable in water and other polar solvents [35][36][37][38][39][40][41][42][43][44][45][46]. For instance, it is dissolvable in different alcohols, for example, ethanol and methanol, just as in progressively intriguing solvents like the profound eutectic dissolvable framed by choline chloride and urea.…”

Investigation of microwave‐assisted synthesis of palladium nanoparticles supported on Fe3O4 as efficient recyclable magnetic catalysts for Suzuki‐Miyaura cross‐coupling

“…Those metal oxide‐based catalysts were used in many fields including cross‐coupling reactions, such as Heck, Sonogashira, and Suzuki‐Miyaura cross‐coupling . Cross‐coupling reactions are of vital importance due to their crucial role in organic and pharmaceutical synthesis . The large‐scale applicability and the outstanding physical and chemical properties of the nanomaterials have had a significant impact on recent efforts in the research and development of modern technologies …”

Polyvinylpyrrolidone - Reduced Graphene Oxide - Pd Nanoparticles as an Efficient Nanocomposite for Catalysis Applications in Cross-Coupling Reactions

“…It is widely known that one of the most important processes in the field of organic synthesis is the carbon-carbon bond formation through crosscoupling reactions that are catalyzed by transition metals. Those types of reactions are widely used in many areas like agricultural, medicinal, and pharmaceutical applications [11][12][13]23,[38][39][40][41][42]. The new synthetic trends are mainly focused recently on using catalysis at the nano scale for green chemistry using microwave assisted synthesis [11][12][13]15,16,18,20,22,23,[40][41][42][43][44][45][46].…”

“…In this context, Pd-PVP has been reported to be one of the most efficient catalysts in cross coupling reactions. Recently, carbon supported catalysts based on the single atom thick layer of carbon atoms in two dimensional (2D) honeycomb lattice named as Graphene have been considered as an ideal support due to its unique thermal, mechanical, electronic structures, and also high surface area [15,16,39,[47][48][49][50][51][52][53]. Furthermore, the outstanding characteristics of Gaphene enabled its combination with other metallic and bi-metallic nanoparticle catalysts which can be used in various chemical reactions and transformations.…”