Search Results for: nanoparticles

Total Search Results Found: 98

The effect of silanize alumina nano-fillers addition on some physical and mechanical properties of heat cured polymethyl methacrylate denture base material

Despite its fragility, poor thermal properties, and high water sorption rates, polymethyl methacrylate (PMMA) is commonly used in denture fabrication. This study aimed to examine how the addition of Aluminum oxide nanoparticles affected the properties of PMMA. A thermal constant analyzer measured the thermal properties of the Al2O3 nanoparticles using the transient plane source (TPS) method. Results showed that the thermal conductivity and thermal diffusivity of acrylic resin improved after the addition of Al2O3 nanoparticles.

Thermally conductive phase-change materials for energy storage based on low-density polyethylene, soft Fischer-Tropsch wax and graphite

Phase change materials (PCMs) are becoming increasingly important in the field of thermal energy storage. In this study, conductive fillers were added to wax- and polyethylene-based PCMs to improve their thermal conductivity. A Thermal Constants Analyser measured the thermal conductivity of the PCMs using the transient plane source (TPS) method. Results indicated that both nanoparticles improved thermal conductivity, but a lower concentration of expanded graphite improved conductivity more than normal Zimbabwean graphite.

Synergetic effect of hybrid boron nitride and multi-walled carbon nanotubes on the thermal conductivity of epoxy composites

Adding metallic nanoparticles to a conventional fluid increases the thermal conductivity of the solution. In this study, flaked boron nitride (BN) and high-aspect-ratio multi-walled carbon nanotubes (MWCNTs) were added to epoxy composites to increase thermal conductivity. A thermal analyser measured the thermal conductivity of the nanofluids using the transient plane source (TPS) method. Results showed that adding a small volume of MWCNT to the epoxy composite significantly improved thermal conductivity compared to when pristine CNTs were used. It was also noted that the thermal conductivity of the composite increased with concentration of BN.

Enhanced thermoelectric properties of Mg2Si by addition of TiO2 nanoparticles

Nano-inclusions are thermally conductive particles that improve the thermal conductivity of liquid mediums. In this paper, the thermal properties of Mg2Si were evaluated after the addition of TiO2 nanoparticles. An instrument measured the thermal conductivity of the nanofluid using the transient plane source (TPS) method. Results showed that the thermal conductivity of the nanofluid was the highest at lower temperatures, and did not improve with the addition of the thermally conductive TiO2 nanoparticles.

An experimental investigation of melting of nanoparticle-enhanced phase change materials (NePCMs) in a bottom-heated vertical cylindrical cavity

A nanoparticle-enhanced phase change material (NePCM) is prepared by the dispersal of carbon nanotubes in 1-dodecanol. The objective of this experiment was to determine if the addition of nanoparticles could increase the thermal conductivity of the base PCM while resulting in a NePCM that would still have the required properties of a functional PCM. It was found that the thermal conductivity was enhanced through the addition of the carbon nanotubes; however, the addition of the nanotubes was found to increase the viscosity drastically to the point that it is not sufficiently offset by the increase in thermal conductivity.