A series of polymer-matrix composites were synthesized by using a variety of carbon nanotubes (single-walled carbon nanotubes (SWCNTs), double-walled carbon nanotubes (DWCNTs) and multi-walled carbon nanotubes (MWCNTs)) and a polymer matrix (either polystyrene (PS) or poly(methyl methacrylate) (PMMA)). Different surfactants and polymerization methods were also used in order to generate a wide range of different composites. These different composites were all tested for thermal and electrical conductivity and characterized ...
The goal of this study was to obtain information on thermal properties of three types of concrete over a wide temperature range (20°C to 800°C). The three types of concrete are: high-strength concrete (HSC), self-consolidating concrete (SCC) and fly-ash concrete (FAC). The thermal data collected included thermal conductivity, specific heat and thermal expansion of the concrete samples using the TPS method. The effect of steel, propylene and other hybrid fibers ...
A new composite zeolite/foam aluminum material is synthesized and its suitability for use in an adsorptive refrigeration system is studied. Current automobile air conditioning systems use vapor compression refrigeration systems which have environmentally unfriendly chemicals and use a significant portion of the engine power of the vehicle. The newly proposed composite zeolite/foam aluminum would work by using the engines heat in order to run the air conditioning systems, ...
Nanofluids and nanorefrigerants are relatively new materials used for a variety of purposes. Specifically, nanorefrigerants are investigated in this study and the authors wanted to devise a theoretical model that could be used to predict the thermal conductivity of nanorefrigerants and nanofluids both. By using the TPS technique the researchers were able to obtain experimental data for the thermal conductivities of a series of nanorefrigerants and through the use of ...
Glass components recovered from dismantled cathode ray tubes (CRTs) are very difficult to recycle or reuse and so other methods of using these glass components must be found to prevent environmental problems. Through the mixing of the recovered glass with calcium carbonate powder, glass foams can be synthesized that have applications in thermal and acoustic insulation. The various effects on the sintering process such as heating rate and holding time ...
