Capillary properties

As the production methods of MWCNTs is very efficient [8] (see Chaps. 2 and 12), it is an advantage to implement a filling procedure after the synthesis. A promising approach to fill CNT cavities, could exploit the capillary properties that have been revealed by Ajayan and lijima [9]. Subsequent studies by Dujardin et al.[10] allowed the estimations of a surface tension threshold in order to select materials that are good candidates to wet and fill CNTs. 

Fuel cell assembly requires that considerable compression be applied to the stack to ensure tight gas seals and good electrical conductivity at the GDM-bipolar plate interface. This compression leads to reduced porosity, smaller average pore size, and possibly other microstructure changes in the GDM. Since capillary properties... 

Great progress has been made towards understanding the air-water capillary properties of GDMs as a result of recent efforts by a number of researchers. Originally motivated by the need to provide... 

Studies in the physical properties of soil. V. The hysteresis effect in capillary properties, and the modes of moisture distribution associated therewith. Ibid., 20 97-116. 

In this paper, we report the results of our investigations into the changes of chemical and energy properties of diamond grain surfaces with changes in physico-chemical and capillary properties of diamond crystallization media. We have carried out a set of special studies to establish main regularities of the correlations between properties of the crystallization media and adsorption-structural properties of synthetic diamond crystals. 

So, our investigations allow us to establish the correlation between physico-chemical properties of the crystallization media (capillary properties of the diamond-metal melt interface, carbon supersaturation in the melt with respect to diamond) and adsorption-structure and energy proreties of the produced diamond powders. Our findings permit us to extend scientific and technological potentialities for production of diamond grinding and micron powders having unique properties. 

Table 3.3. Capillary properties of molten Sn/a-AhOj system measured by the wetting balance technique at 1370K using A12Oj cylinders (De Jonghe et al. 1990). fly is calculated by equation (3.22).

T.J Walsh, "Capillary properties of model pores". PhD Thesis, Loughborough University of... 

In this period, a start was made on the study of fault zones. On the Gulf Coast, it had already been noticed that faults can separate oil or gas accumulations from water-bearing sands. Hubbert, in deriving the theoretical concepts of petroleum trapping, had shown that the boundary of a reservoir rock is a barrier to hydrocarbon migration because of its capillary properties (Hubbert, 1953). Observations of fault zone material showed the effect of cataclasis but also the presence of smeared-in shale. 

Benoit V, Yappert MC (1996) Effect of capillary properties on sensitivity enhancement in capillary - fiber optical sensors. Anal Chem 68 183-188... 

Figure 5 depicts the liquid spinodal curves Sp(L) in a pressure-temperature diagram for fixed CO2 compositions. The region of negative pressures, which is of interest for describing the capillary properties of CO2 aqueous solutions, has been also included. Interestingly, it can be noted that spinodal Sp(L) isopleths present a pressure-temperature trend, which looks similar to the liquid spinodal curve of pure water.At low temperatures, the Sp(L) isopleths are decreasing steeply before to reach a pressure minimum. Then at subcritical temperatures, isopleths are less spaced and sloped, and they finish to meet the H2O-CO2 critical curve. The temperature appears as a determining parameter in the explosivity control of CO2 aqueous solutions. Like for water, the easiest way to generate an explosive vaporization is a sudden depressurization in the superspinodal domain, where spinodal curves have a gentle slope in a P-T diagram (Fig. 5). This superspinodal field can be estimated theoretically irom the PRSV equation of...

We note that the Knudsen diffusivity is proportional to the pore radius (capillary property), to the square root of temperature and to the inverse of the square root of the molecular weight (diffusing molecule property). It is independent of the total pressure and independent of other diffusing species. 

For other animals, the use of capillary properties serves as a mean to walk on water surface (see Fig. 3). Gorb wrote a review on how insects make use of adhesion in... 

Because imbibition and drainage behaviour are to be modelled, we require the capillary properties of the individual tetrahedral pores. This Involves calculating the curvature of menisci in non-axisymaetric, converging-diverging pores -something that cannot yet be done - and consequently we have fallen back on the... 

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