نتایج جستجو برای: nano porosity

تعداد نتایج: 67987  

2013
Ana M. Díez-Pascual Mohammed Naffakh

Carbon fiber (CF)-reinforced high-temperature thermoplastics such as poly(phenylene sulphide) (PPS) are widely used in structural composites for aerospace and automotive applications. The porosity of CF-reinforced polymers is a very important topic for practical applications since there is a direct correlation between void content and mechanical properties. In this study, inorganic fullerene-li...

2012
Yang Gao Yun Shen Zhou Min Qian Xiang Nan He Jody Redepenning Paul Goodman Hao Ming Li Lan Jiang Yong Feng Lu

Recent studies have demonstrated that carbon nano-onion (CNO) is a promising candidate for high-power supercapacitors due to the nonporous outer shell, which is easily accessible to electrolyte ions. However, the nonporous ion-accessible outer shells also limit the energy density of the CNOs, which requires large specific surface area. Introducing porosity to the outer shells of CNOs can effect...

2011
Shawn Zhang Robert E. Klimentidis

As oil and gas production from conventional reservoirs is declining and oil price is going up, unconventional mudstone reservoirs (“shale-gas”) are becoming more important. However, while their characterization is of utmost importance for production planning, these low permeability rocks are very challenging to characterize due to their complex nano-scale pores and mineral structure. 3D imaging...

Journal: :Journal of colloid and interface science 2004
Annette Hofmann Manuel Pelletier Laurent Michot Anna Stradner Peter Schurtenberger Ruben Kretzschmar

Hydrous ferric oxides (HFO) are efficient sorbents for inorganic and organic pollutants and therefore have great potentials in environmental science and engineering applications. Freezing and thawing of HFO suspensions leads to the formation of dense HFO aggregates. It facilitates the handling and increases the drying rate of HFO. In this study, we used a combination of pycnometry, gas adsorpti...

Journal: :Applied sciences 2023

The boiling behavior on nano-structured surfaces is a frontier research direction in nuclear engineering. However, the mechanism of heat transfer still unclear. In this study, depletable micro-layer model and nano-structure are proposed based Moving Particle Semi-implicit (MPS) method coupled with Meshless-Advection using Flow-directional Local-grid (MAFL) scheme, also known as MPS-MAFL method....

2007
C. W. Huck N. Heigl M. Najam-ul-Haq M. Rainer R. M. Vallant

In analytical chemistry, silica gel plays a pre-dominant role in separation science. It is the most important stationary phase in chromatography and electrophoresis. Separation efficiency is directly dependent on the quality and physical properties of the chromatographic bed. Therefore, methods for the physicochemical characterisation of silica stationary phases have been developed over the pas...

2017
Oliver Plümper Alexandru Botan Catharina Los Yang Liu Anders Malthe-Sørenssen Bjørn Jamtveit

The transport of fluids through the Earth's crust controls the redistribution of elements to form mineral and hydrocarbon deposits, the release and sequestration of greenhouse gases, and facilitates metamorphic reactions that influence lithospheric rheology. In permeable systems with a well-connected porosity, fluid transport is largely driven by fluid pressure gradients. In less permeable rock...

2015
P. Scholder I. Nischang

Equipment Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) were performed with a Crossbeam 1540 XB electron microscope to probe the morphological dry-state properties of the prepared materials and existence of desirable chelated palladium functionality. Liquid chromatographic measurements were performed with a 1290 Infinity UHPLC instrument from Agilent Technolo...

2017
Emanuele Cavaliere Giulio Benetti Margriet Van Bael Naomi Winckelmans Sara Bals Luca Gavioli

Nanocomposite systems and nanoparticle (NP) films are crucial for many applications and research fields. The structure-properties correlation raises complex questions due to the collective structure of these systems, often granular and porous, a crucial factor impacting their effectiveness and performance. In this framework, we investigate the optical and morphological properties of Ag nanopart...

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