Hybrid Materials: Synthesis, Characterization, and by Guido Kickelbick

By Guido Kickelbick

Hybrid fabrics have presently a good influence on various destiny advancements together with nanotechnology. This e-book offers an outline concerning the kinds of fabrics, truly dependent into synthesis, characterization and purposes. an ideal place to begin for everybody attracted to the sector, but additionally for the expert as a resource of top of the range details.

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23 24 1 Introduction to Hybrid Materials Another point which was also already mentioned is the predictability of the final material properties if well-defined building blocks are used. A typical building block should consist of a well-defined molecular or nanosized structure and of a well-defined size and shape, with a tailored surface structure and composition. In regard of the preparation of functional hybrid materials the building block should also deliver interesting chemical or physical properties, in areas like conductivity, magnetic behavior, thermal properties, switching possibilities, etc.

8 Organic monomers typically applied in the formation of sol–gel/organic polymer hybrid materials. 2 Formation of Organic Polymers in Presence of Preformed Inorganic Materials If the organic polymerization occurs in the presence of an inorganic material to form the hybrid material one has to distinguish between several possibilities to overcome the incompatibilty of the two species. g. alkyl chains); or it can contain reactive surface groups such as polymerizable functionalities. Depending on these prerequisites the material can be pretreated, for example a pure inorganic surface can be treated with surfactants or silane coupling agents to make it compatible with the organic monomers, or functional monomers can be added that react with the surface of the inorganic material.

Some typical monomers that form either homopolymers with a good interaction or that can be used to improve the interactions by copolymerization are shown in Fig. 13. A particularly interesting group of macromolecules are block copolymers, consisting of a hydrophilic and a hydrophobic segment. They can be tailored in such a way that they can react with two phases that reveal totally different chemical characters and therefore, they are known as good compatibilizers between two components. These surfactants were for example often used for the modification of nanoparticles, where one segment interacts with the surface of the particle, and the other segment sticks away from this surface.

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