High speed microscopy was used to allow real time visualization of the movement of nanoparticles made up of single-walled carbon nanotubes (SWCNT) and Fe2O3. An electrostatic force was induced to the nanotube/Fe2O3 composite and caused perfect conjugate structures which result in excellent thermal, electrical, and mechanical properties. The alignment of the carbon nanotubes in nanosuspensions may offer new opportunities for the development of nanofluids....
A variety of nano and micro-sized boron nitride (BN) particles were dispersed in a polyimide (PI) precursor polyamic acid (PAA) using a surfactant in order to generate a thermally conductive polyimide composite film with excellent thermal properties. The observed thermal conductivities varied with the BN weight % and the particle size. BN weight % was raised as high as 30%, which resulted in a thermal conductivity of 1.2 W/mK. Glass transition and thermal ...
The 'graphene-like' mechanical exfoliation of Bi2Te3 films is shown to have a significant effect on the thermoelectric properties of these films. The modification of thermal conductivity due to exfoliation leads to enhanced thermoelectric properties, known as figures of merit (ZT).Two different experimental techniques were used in order to determine the thermal conductivity of the exfoliated films: transient plane source (TPS) and laser flash technique (LFT). Annealing was performed ...
The addition of ceramics, Boron Nitride and Boron-Aluminum Nitride, to an organosoluble polyimide (PI) film was investigated in this research. Test were performed to determine the effect of the addition of ceramics, on the thermal performance of the film, at room temperature. After appropriate treatments, the BN-PI elicited a thermal conductivity of 2.3 W/mK, as compared to the neat polyimide, with a thermal conductivity of 0.13 W/mK. In contrast, due ...
Catechins were added to boron nitride nanotube (BNNTs)/polyvinyl formal (PVF) composite films, in hopes of further increasing the thermal conductivity of the film. After thermal conductivity testing, the composite films were determined to have an increased thermal conductivity, as compared to their neat form. Researchers determined that the increase of thermal conductivity was related to the aromatic rings within the catechin, which interact with the nanotube surfaces. Upon contact, ...
