Abstract
In order to study the properties of the different density silica gels optical methods were used. It is shown that layers of gels spatially inhomogeneous and anisotropic, their optical density are significantly reduced near the free surface. It is found that on the surface of thin layers of silica gel there are convective structures. Features of multi-layered gel structures with different densities were studied. It is found that after the gels forming layers have poor adhesion to each other. This is due to the fact that the volume between different layers of gels filled with liquid. The presence of liquid in the interlayer volume is observed visually and confirmed by the light scattering of the laser beam. The thicknesses of the liquid boundaries between the layers of the gels were estimated.
Highlights
Gel is a dispersive system with liquid dispersing medium, and the dispersion phase makes up a spatial structured mesh due to intermolecular interaction in the contact sites
The aim of the investigation is to study of the fundamental properties of the gels layers by optical methods in relation to its using in additive 3D technologies
When the ray go along the boundary layers of the gels it is clearly visible a lateral dispersion that occurs in a planar waveguide
Summary
Gel is a dispersive system with liquid dispersing medium, and the dispersion phase makes up a spatial structured mesh due to intermolecular interaction in the contact sites. The promising application of gels is the use in regenerative medicine for growth of biological tissues, including the problem of culturing stem cells in vitro [3, 4]. This capillary network is intended for the delivery of nutrients to individual cells, and to remove products from the metabolism. For experimental study we used gels that are based on silicates Such gels are well investigated (see, for example [7]), prepared and not toxic. The aim of the investigation is to study of the fundamental properties of the gels layers by optical methods (for example, silica gels different density) in relation to its using in additive 3D technologies. It is important to obtain data on the properties of multilayer gels structures and to determine the effects on the properties of the boundary layers between the gels
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