Four different cationic surfactants were allowed to adsorb on boron nitride (BN) over the pH range of 5.5 to 8 in separate experiments. The authors talk about the orientation of the surfactant relative to the BN particles. The use of these surfactants has changed the partial ionic surface of BN to a hydrophobic surface, which also led to an increase in thermal conductivity and more favourable mechanical properties....
Different concentrations of boron nitride (BN) were added to novolac resin in order to create a composite and modify the thermal conductivity which increased with increasing BN concentration. An instrument was used for the thermal conductivity measurements. Different size BN particles were also explored. The Maxwell-Eucken model was used to predict values which aligned well with experimental results....
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 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 ...
This study aims to use Boron Nitride (BN) materials as thermo-conductive fillers to enhance the heat transfer in fluids. For this study, BN nanotubes, and nanospheres were added to fluids, to test for individual thermal enhancements. With the addition of BN nanotubes to water, the thermal conductivity of the fluid was enhanced by 2.6 times. Also noted, was the increase in conductivity of the fluid with the addition of BN nanospheres. ...
