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Recommended Papers for: composites

Total Papers Found: 58

Ultrathin BN nanosheets with zigzag edge: one-step chemical synthesis, applications in wastewater treatment and preparation of highly thermal-conductive BN-polymer composites

Ultrathin boron nitride nanosheets (BNNSs) were prepared at 300°C by a new variable-pressure one-step synthesis. An increase in pressure during the synthesis results in a decreased thickness for the nanosheets, which were all triangular in shape with zig-zag edges. The synthesized nanosheets exhibit high adsorption capacities for the organic dye methylene blue (MB). In addition to these properties, the BN nanosheets can be used as excellent thermal-conducting additives in BN-polymer ...

Author(s): , , , , , ,

Phonon thermal conductivity suppression of bulk silicon nanowire composites for efficient thermoelectric conversion

Vertically-aligned silicon nanowires (SiNWs) are investigated for their use as thermoelectric materials. Using a silver-induced electroless-etching method, SiNWs of varying lengths are prepared, which are expected to have lower thermal conductivities as compared to bulk silicon. A thermal constants analyzer is used to perform the thermal analysis of the SiNWs, and thermal conductivity values are reduced by up to 43%. Theoretical models are then used to explain the quantitative results obtained ...

Author(s): , , ,

Dispersion and Exfoliation of Graphene in Rubber by an Ultrasonically-Assisted Latex Mixing and In situ Reduction Process

Natural rubber/graphene (NR/GE) composites were prepared by ultrasonically-assisted latex mining and an in situ reduction process, followed by latex coagulation to obtain the masterbatch. It was determined that this method of preparing the NR/GE composites resulted in an increase in tensile strength when compared to conventional direct mixing. A variety of properties of the composites were investigated, including: thermal conductivity, thermal diffusivity, specific heat, maximum torque, crosslink ...

Author(s): , , , , ,

Thermal conductivity and tribological properties of POM-Cu composites

Polyoxymethylene (POM) composites were prepared by using varying concentrations of copper particles and tested thermally via tribologically via an M-2000 friction and abrasion testing machine. A copper concentration below 10 wt.% didn't affect the thermal properties of the POM composite but using higher concentrations resulted in improved thermal conductivities. Using a copper concentration of 25 wt.% resulted in a thermal conductivity value 35.9% higher than unfilled POM. In addition to the improved thermal ...

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Studies on the Preparation of Polystyrene Thermal Conductivity Composites

Through the use of thermally conductive fillers the thermal properties of polystyrene (PS) are improved significantly. The different fillers include: aluminum oxide (Al2O3), magnesium oxide (MgO), B-silicon carbide particles (B-SiCp),  and  B-silicon carbide whiskers (B-SiCw). The use of PS flakes resulted in higher thermal conductivities than the use of PS particles, and the use of  B-silicon carbide whiskers resulted in the most favorable thermal conductivity and resulted in a ...

Author(s): , , ,