Materials, modern carbon nanotubes

Carbon nanotubes (CNTs) are a set of materials with different structures and properties. They are among the most important materials of modern nanoscience and nanotechnology field. They combine inorganic, organic, bio-organic, coUoidal, and polymeric chemistry and are chemically inert. They are insoluble in any solvent and their chemistry is in a key position toward interdisciphnary applications, for example, use as supports for catalysts and catalytic membranes [20, 21]. 

The above analysis takes the synthesis methods, the performance affected by the dispersion of CNTs, enhanced physical properties and the latest applications of carbon nanotube/polyurethane composites described in literature reports as the reference point. In the interest of brevity, this is not a comprehensive review, however, it goes through numerous research reports and applications which have been learned and described in the recent years. Despite that, there are still many opportunities to synthesize new carbon nano-tube/polyurethane systems and to modify carbon nanotubes with new functional groups. The possibility of producing modern biomedical and shape memory materials in that way makes the challenge of the near future. 

CNTs are the common allotropes of carbon element and possess cylindrical nanostrucmre [36, 37]. Nanotubes are members of the fullerene stmcmral family, and its name is derived from their hollow, long structure with the walls formed by one-atom-thick sheets of carbon [36, 37]. CNTs have many exceptional properties, which are precious for modern science and technology [37]. And they have proven potential application in the field of electronics, optics, and other fields of materials science and technology [38]. In specific, owing to their outstanding thermal, mechanical and electrical properties and find significant applications in all field of science so, the area of the conductive polymer is not an exception [37, 38]. Some important properties of CNTs are tabulated below (Fig. 4 Table 1). 

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