Finite element and molecular dynamics models were used to study the effect of pore size and porosity on the thermal conductivity of polymeric foams. These models were then verified by measurements made using the transient plane source technique. It was determined that the pore size has a significant effect on the thermal conductivity of these foams, and that when the pore size decreases to the nanometer scale, the thermal conductivity ...
Biobased foams derived from lignins and tanins were produced by mechanical frothing and curing. The obtained foams did not crack after drying. The foams were found to be good thermal insulators with thermal conductivities ranging from 0.035 to 0.055 Wm-1K-1....
The reaction to fire properties of three commercial coatings designed for steel structures were investigated. The coatings in this study were covering a glass fiber-reinforced epoxy composite. It was determined that the thermal barrier effectiveness of these coatings was dependent on the degree of expansion and the thermal conductivity of the expanded char. Using these two parameters, the required thickness of a coating that can enable a structure to withstand ...
The use of sensors for the determination of content ratio in binary mixtures of fluids was investigated. The sensors were manufactured with various layouts of metal foil encapsulated by Kapton. Due to the difference in thermal conductivity between two fluids in a mixture, the thermal conductivity of the mixture is dependent on the ratio of the fluids. This method could be used in the future in Direct Methanol Fuel Cells (...
The authors present a method of preparation of TiO2 nanotubes by alkaline treatment (with NaOH) of TiO2 particles followed by acid-washing and annealing treatment. Theoretical and experimental studies on the thermal conductivity of TiO2 nanotubes is also presented. The thermal conductivity values determined experimentally matched well with theoretical values obtained. It was found that TiO2 nanotubes had a lower thermal conductivity than the original TiO2 particles. This phenomenon was attributed ...
