Nguyen T. – Page 2 – TechConnect Briefs

An analytical method to quantify the release of silica nanoparticles from polymer nanocomposites exposed to UV radiation

Rabb S.A., Yu L.L., Nguyen T., National Institute of Standards and Technology, US

Silica nanoparticles are being utilized to enhance the mechanical performance of polymeric coatings used in automotive and construction industries. However, cumulative effects of UV radiation will degrade the polymeric molecules, resulting in a potential for [...]

Direct Evidence of Nanoparticle Release from Epoxy Nanocomposites Exposed to 295 nm-400 nm UV Radiation

Nguyen T., Pellegrin B., Stutzman P., Shapiro A., Byrd E., Gu X., Chin J., NIST, US

Nanoparticles are increasingly used for enhancing multiple properties of polymers in many industries including construction, automobile, and aerospace. However, recent research suggests that nanoparticles might have negative effects on the environments and health safety. Since [...]

Role of Nanoparticles in Life Cycle of Nanocomposites

Gu X., Chen G., Zhao M., Watson S.S., Zhe D., Stutzman P.E., Nguyen T., Chin J.W., Martin J.W., NIST, US

This study is to investigate the role of ZnO nanoparticles in the life cycle of a waterborne polyurethane (PU) nanocomposite during UV exposure. The specimens were exposed to the NIST SPHERE (Simulated Photodegradation via High [...]

Subsurface characterization of high dielectric nanostructures in low dielectric polymer matrix using Electric Force Microscopy and Scanning Electron Microscopy

Zhao M., Ming B., Stutzman P., Chen G., Gu X., Park C., Jean Y.C., Nguyen T., National Institute of Standards and Technology, US

Scanning Probe Microscopy (SPM) and Scanning Electron Microscopy (SEM) are two powerful techniques for surface characterization of nanostructures. With the development of nanotechnology, there is a growing need to nondestructively characterize nanostructures at the subsurface [...]

Degradation and Nanoparticle Release of Epoxy/Nanosilica Composites Exposed to Solar UV Radiation

Pellegrin B., Nguyen T., Mermet L., Shapiro A., Gu X., Chin J., NIST, US

Nanoparticles are increasingly incorporated in polymers to enhance multifunctional properties. However, polymers are prone to undergo photodegradation under UV exposure, resulting in a liberation of nanoparticles from the polymer nanocomposites during their life cycle. The [...]

Network Aggregation of CNT at the Surface of Epoxy/MWCNT Composite Exposed to UV Radiation

Nguyen T., Pellegrin B., Mermet L., Shapiro A., Gu X., Chin J., NIST, US

CNTs are increasingly incorporated in polymers to enhance their mechanical and other properties. However, organic polymers are prone to degrade under UV radiation. Therefore, CNTs in a polymer nanocomposite will eventually be released into the [...]

A Markedly Cntrollable Adhesion of Superhydrophobic Sponge-like Nanostructure TiO2 Films

Lai Y., Lin C., Huang J., Zhuang H., Sunb L., Nguyen T., Xiamen University, CN

A method consisting of electrochemical anodization and self-assembling of hydrophobic-hydrophilic mixture has been employed to fabricate superhydrophobic sponge-like nanostructured TiO2 surfaces with remarkably controllable adhesion. Water adhesion ranged from ultra-low (5.0 N) to very high [...]

Polyurethane Nanocomposites Containing NCO-Functionalized Carbon Nanotubes and NCO-Functionalized Nanoclays

Nguyen T., Granier A., Pellegrin B., Celina M., NIST, US

Mechanical property, UV resistance, and oxygen permeation performance of automobile polyurethane (PU) coating containing NCO-functionalized (MWCNTs and nanoclays) have been measured. A novel method was used to functionalize CNTs and nanoclays using a diisocyanate in [...]

A Markedly Cntrollable Adhesion of Superhydrophobic Sponge-like Nanostructure TiO2 Films

Lai Y., Lin C., Huang J., Zhuang H., Sunb L., Nguyen T., Xiamen University, CN

A method consisting of electrochemical anodization and self-assembling of hydrophobic-hydrophilic mixture has been employed to fabricate superhydrophobic sponge-like nanostructured TiO2 surfaces with remarkably controllable adhesion. Water adhesion ranged from ultra-low (5.0 N) to very high [...]