Homogenizer micro-encapsulation

FIGURE 18.3 SEM images of shell thickness of broken silica microcapsules doped with aqueous glycerol, obtained from [water + glycerol]/TEOS ratio = 10/1 (a) and 1/1 (b). Aqueous glycerol is homogeneously micro-encapsulated in the capsules core. (Reproduced from Galgali, G. et al Mater. Res. Bullet., 46,2445,2011.)... 

Figure 7 shows the hue value frequency of an unencapsulated TLC layer in compariscai to a more common layer with micro-encapsulated TLCs (micro-encapsulation). While unencapsulated TLCs display a clear-cut signal for a homogenous temperature distribution, micro-encapstflated TLCs show a much more attenuated and blurred signal. This is due to the empty space between the capsules which displays no color information and due to the reflections on the capsule surface. 

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