Papers – Page 34 – TechConnect Briefs

Generating Functionalized Nanocabons and Polymer Nanocomposites in Poly(phosphoric acid)

Tan L.-S., Wang D.H., Baek J.B., Air Force Research Laboratory, US

Inorganic acids such as HNO3, HCl, H2SO4 are commonly used to remove catalyst residues and carbonaceous impurities from carbon nanotubes and nanofibers. Under more forcing conditions, oxidizing nitric acid is known to “cut” the CNT [...]

High-Density Carbon Nanostructured Papers with Superior Conductive and Mechanical Properties

Younes H., Abu Al-Rub R., M. Rahman Md., Dalaq A., Al Ghaferi A., Masdar, AE

The randomly oriented carbon nanotubes have exhibited substantially lower electrical and thermal conductivities than anticipated. In this work high density CNS-based BPs have been fabricated successfully using aligned carbon nanostructure and the anionic surfactant NaDDBS. [...]

Preparation and mechanical properties of fiber-reinforced silica aerogels and its phase change nanocomposite

Zhou X., Georgia Institute of Technology, US

The present study is devoted to the investigation of mechanical properties of fiber-reinforced silica aerogels and composite phase change materials. We firstly reported our study on the preparation process of fiber-reinforced silica aerogels and PCM/silica [...]

Thermodynamic/heat transfer of n-eicosane in silica nano-porous materials

Zhou X., Georgia Institute of Technology, US

This study mainly involved the fabrication of n-eicosane/silica nanocomposite and modeling of combined thermodynamic/heat transfer based on the prepared composite structure and measured thermo-physical data. we performed combined thermodynamic/heat transfer analysis to obtain the total [...]

Influence of CNT concentrations to polyurethane / multi-walled carbon nanotube composites on the thermoelectric performance

Wu Q., Hu J., The Hong Kong Polytechnic University, HK

In this paper, we investigated the possibility of applying polyurethane in thermoelectric application, and the influence of MWNT concentrations to polyurethane / multi-walled carbon nanotube composites on the thermoelectric performance. Polyurethane was used as the [...]

The Use of Nano Fillers in Silicone Rubber Composites for High Voltage Insulators

Ramirez I., Instituto de Investigaciones Eléctricas, MX

Since some years ago, polymer compositions have been used for outdoor electrical insulation applications as an alternative to inorganic materials such as porcelain and glass. The organic compositions are based on silicone rubber (SiR) and [...]

Effect of ZrO2 Additives on the Nanomechanical Properties of Spark Plasma Sintered 93WC/7-xCo/xZrO2-2mol% Y2O3 Powders Prepared by High-Energy Ball Milling

El-Eskandarany M.S., Al-Hazza A., Al-Hajji L., Alduweesh A., Ahmed S., Al-Rowayeh A., Kuwait Institute for Scientific Research, KISR, KW

A high-energy ball milling technique was employed to prepare ultrafine cemented carbide nanocomposite powders with compositions (wt.%) of 93WC/7-xCo/xZrO2-2mol% Y2O3 powders (x=0, 1, 2, 3, 4, 5, 6, 7 wt%). The nanocomposite powders obtained after [...]

Copper/CNT composite materials with enhance mechanical and termal properties

Silvain J.F., Vallet G.M., Dunand M., ICMCB-CNRS, FR

With their huge mechanical, thermal and electrical properties, carbon nanotubes are good candidates as reinforcements in material composites. However, such materials are not easy to elaborate and several problems occurred such as the dispersion of [...]

Increased Heat Transfer through Dropwise Condensation on a Bio-inspired Superhydrophobic-Hydrophilic Surface

Mondal B., Mac Giolla Eain M., Xu Q.F., Egan V., Punch J., Lyons A.M., City University of New York, US

Condensation of water vapor is an essential process in power generation, water collection, and thermal management. Because of the high surface energy of the metal surfaces, filmwise condensation of water vapor occurs, forming a static, [...]

Surface Hydrophobization of Micro- and Nanofibrillated Cellulose and Blending Property in PLA Nanocomposites

Samyn P., University of Freiburg - Freiburg Institute for Advanced Studies, DE

Cellulose fibers are advantageous reinforcing materials for bio-based composites because of their availability and good mechanical properties. Several chemical processes have been developed to turn the native fibers into micro- (MFC) or nanofibrillated (NFC) cellulose [...]