Inorganic polymerization

Mark, J. E., Allcock, H. R., and West, R. (1992). Inorganic Polymers. Prentice Hall, Englewood Cliffs, NJ. A modern treatment of polymeric inorganic materials. 

When the composite-matrix is formed with a polystyrene solution as a dispersion medium, the self-assembly of silica particles is influenced by the adsorption of macromolecules on their surface. During adsorption, both solitary macromolecules and their aggregates transfer simultaneously onto the adsorbent surface. Depending on solution concentration, not only the conformation of adsorbed molecules but also the number and size of macromolecular aggregates in the solution change on adsorption. This leads to the formation of complex-shaped structures, which are linked by a system of nonvalent interactions and consist of polymeric-inorganic blocks[8,14] this is of interest in the preparation of a nanostructured medium (polystyrene-silica gel) as a precomposite for the fabrication of carbon structures in a matrix of silica particles. 

More than one hundred years ago, L. Liberman (1890) found high-polymeric inorganic polyphosphates (PolyPs) in yeast. These compounds are linear polymers containing a few to several hundred residues of orthophosphate (Pi) linked by energy-rich phosphoanhydride bonds. 

Other Heterocyclic The reaciion of Me SiCI with water at elevated temperatures gives polymeric Inorganic Ring (Mc3SiO) (Eq- 16.231. but if hydroly s is earned out at room lempeniturc. the... 

Membrane processes are classified according to the nature of the membrane and the driving force employed. A number of different types of polymeric/inorganic membranes have been developed in recent times in basically four types of modular assemblies, namely, plate and frame, spiral, tubular, and hollow fine fiber. Table 29.4 gives the application of various membrane processes for the separation of different types of contaminants encountered in effluents. 

Membranes are classified by whether the thin permselective layer is porous or dense, and by the type of material (organic, polymeric, inorganic, metal, etc.) this membrane film is made from. The choice of a porous vs. a dense film, and of the type of material used for manufacturing depends on the desired separation process, operating temperature and driving force used for the separation the choice of material depends on the desired permeance and selectivity, and on thermal and mechanical stability requirements. For membrane reactor applications, where the reaction is coupled with the separation process, the thin film has also to be stable under the reaction conditions. 

J.-Q. Jiang and N.J.D. Graham (1997) Chemistry Industry p. 388 - Pre-polymerized inorganic coagulants for treating water and waste water . 

FTIR analysis was also used to study the efficiency of the sol-gel enzyme encapsulation method that uses TEOS as precursor. The silica matrix gelation procedure produces a tridimensional reticulate formed by interacting polymeric inorganic chains that form a holding net around the enzyme, and FTIR can be used to follow this encapsulating process. The FTIR spectrograms obtained for the pure silica matrix and the encapsulated CGTase are shown at Fig. 6. 

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