Nanocomposites, organic-inorganic composite

Abstract Nanostructured organic-inorganic composites have been the source of much attention in both academic and industrial research in recent years. Composite materials, by definition, result from the combination of two distinctly dissimilar materials, the overall behavior determined not only by properties of the individual components, but by the degree of dispersion and interfacial properties. It is termed a nanocomposite when at least one of the phases within the composite has a size-scale of order of nanometers. Nanocomposites have shown improved performance (compared to matrices containing more conventional, micron-sized fillers) due to their high sirnface area and significant aspect ratios - the properties being achieved at much lower additive concentrations compared to conventional systems. 

The chemical s mthesis and analysis of properties of layered nanocomposites devoted tens publications. In the last decade for the synthesis of metal, oxide, hydroxide nanostructures used method of laser ablation of metals in a liquid medium [10-12]. However, the researches aimed at producing layered organic-inorganic composites by this flexible, simple method are not enough [13]. Practically important is also the question of the structural stability of these composites in the colloidal state under the influence, in particular, laser radiation optical range (colloidal stability of drugs, film, optical data carriers, etc.). 

Novak B.M, Davies C. Inverse organic-inorganic composite materials. 2. Free-radical routes into nonshrinking sol-gel composites. Macromolecules 1991 24 5481-5483 Novak BM. Hybrid nanocomposite materials— between inorganic glasses and organic polymers. Adv. Mater. 1993 5(6) 422-33... 

Composite materials exhibit excellent performance, which can be widely used in aerospace, defense, transportation, sports, and other fields. Nanocomposites are one of the most attractive parts of the composite materials. Due to the fast development in recent years, nanocomposites are widely used by the developed countries for manufacturing new materials. The research on nanocomposites indudes organic-inorganic composites, nanopolymer matrix composites, and inorganic-inorganic composites. In this chapter, combined with our research experience, we mainly introduce the nanopolymer matrix composites to the readers. The synthesis and modification of nanopartides and preparation, characterization, and applications of nanopolymer matrix composites are mainly discussed. 

In order to prepare ENR/silica nanoscale organic-inorganic hybrid composites, nanosilica has been generated by the sol-gel technique using TEOS as a precursor. Their effect on mechanical properties of the resultant nanocomposites have been... 

The hypothesis formulated to explain the results shown here considers the nanoribbons as an extremely organised (oriented) hybrid organic-inorganic nanocomposite. The size control as well as the isolation of these nanoribbons, which can eventually be done using a polymerisable surfactant, may be feasible for give more information about the composition and the structure of such nanoribbons. 

Sol-gel nanocomposites are further subdivided into six categories (1) com-positionaUy different nanocomposites, (2) structurally different nanocomposites, (3) both compositionally and structurally different nanocomposites, (4) nanocomposites of gels with precipitated phases, (5) nanocomposites of xerogels with metal phases, and (6) nanocomposites of inorganic gels and organic molecules. 

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