Nanosilica materials applications

The water-rich powders containing up to 98% (by weight) of water and a small amount of hydrophobic nanosilica and characterized by the same flow properties as dry silica powder ( dry water ) can be prepared by a mixing process at a high rpm value (Berthod et al. 1988, Hamer et al. 2001, Lahanas et al. 2001, Yoichiro et al. 2002, Koga et al. 2004, Dampeirou 2005, Hasenzahl et al. 2005, Binks and Murakami 2006, Forny et al. 2007, 2009, Saleh et al. 2011). Dry water materials with water droplets covered by the hydrophobic shells or related dried materials without water are of interest for applications in medicine, cosmetics, biotechnology, etc. 

Interaction of HPF with nanosilica is of special interest because of the medical applications of this material, especially as a component of tourniquet preparations. Therefore, here we will analyze adsorption interactions of fibrinogen with nanosilica depending on concentration of components, salinity, and pH. Application of several methods such as (i) adsorption of HPF from the aqueous solutions (ii) UV and FTIR spectroscopy of adsorbed layer with HPF and (iii) TSDC and H NMR spectroscopy with layer-by-layer freezing-out of bulk and bound water interacting with HPF and HPF/nanosilica allows us to deeply understand features of interaction of HPF with silica NP that is of importance for elucidation of the mechanism of interaction of nanosilica preparations with blood. 

The incorporation into PU foams of different types and concentrations of nanosized functional particles, both platelet-like such as nanoclays or graphene, fibrous-like such as carbon nanotubes and nanofibers, or even spherical-like such as nanosilica, has been shown to have a significant effect in the structure and physical properties of the resulting materials, considerably expanding the already wide range of possible applications of these lightweight materials. 

Synthesis of Symmetric and Asymmetric Nanosilica for Materials, Optical and Medical Applications... 

The thmst behind the advancement of any field depends on the appUcation potential or real benefits, much more so than the materials themselves, and the same rule appUes to nanosiUca-whether symmetric or asymmetric. In the following sections we will survey the appUcations of both symmetric and asymmetric nanosilica. It will become clear that asymmetric nanosiUca, at present, have far fewer applications than their symmetric counterparts, although several excellent obvious... 

Figure 7). It is supposed that this will also result in an improvement of the tribological properties of these materials (see Section 4.4), since during the application of an external frictional load, the presence of hard nanosilica particles imparts a higher load withstanding capability, thus preventing matrix deformation... 

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