Grafted silane

Vinyl silanes are another class of graft monomers. These materials or oligomers made from them are used as release agents which prevent adhesive materials from sticking to a film or substrate (Fig. 2). Grafted silanes have also found use in bio-medical applications and in the modification of fine inorganic particulates, such as silicas. 

Porous materials obtained via silane grafting may face problems of nonuniform distribution of the functionalities. Pore blocking can occur if the grafted silanes accumulate at the pore entrances. Also, unwanted silane oligomerization can occur, especially in the presence of water. 

Self-Assembled Hybrid Films and Layers of Grafted Silanes... 

Fig. 4. Ellipsometrie cartography of the thin precursor film zone, for a drop deposited on a grafted wafer, a) cos A as a function of the position (x ) in the wafer plane b) Equal cos A lines (i.e., equal thickness lines), displaying an overall axial symmetry, plus strong fluctuations, related to the inhomogeneities of the grafted silane monolayer. For a better visualization, the carto- raphy is truncated at A = - 0.7, i.e., thicknesses of order 250... 

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