Carbon nanotube SWCNT and MWCNT

Carbon Nanotubes Single-waUed and multiwalled carbon nanotubes (SWCNT and MWCNT, see Chapter 13) can be grown as a carpet of fibers on a substrate (see Figure 13.12 in Chapter 13) such as a silicon wafer patterned with catalyst. Production of more than a monolayer of SWCNT gives bundles of tubes that are very difficult to separate into individual tubes because the van der Waals forces between parallel tubes in a bundle are stronger than between the tubes and solvent (see... 

Among the many potential applications of carbon nanotubes (CNTs), their use as reinforcing fillers for fhe fabrication of polymer nanocomposites has received considerable attention [1-4]. Both single-walled and multiwalled carbon nanotubes (SWCNTs and MWCNTs, respectively) are noted for their outstanding thermal, electrical, and mechanical properties. Polypropylene (PP) is a widely used thermoplastic because of its low cost, good processability, and well-balanced physical and mechanical properties. Products of PP take the forms of fibers, films, and molded articles. This chapter highlights the microstructure and properties of PP/CNT nanocomposites. Since most studies dealt with isotactic polypropylene, the term TP" in this chapter refers to isotactic polypropylene unless otherwise stated. 

CVD may also be used as a simple, energy-efficient method to produce single- or multi-walled carbon nanotubes (SWCNTs and MWCNTs, respectively) with growth control, high yield, and purity. In this case, catalyst nanoparticles of transition metals (as Ni, Co, and Fe) are used as seeds." ... 

Recent work in in situ composites has included the incorporation of single and multi-wall carbon nanotubes (SWCNT and MWCNT). Notably, a low-cost alternative exists in the form of thermal chemical vapor deposition-grown carbon nanohbers (CNF) which are slightly inferior due to... 

CNTs consist of graphite sheets rolled into a cylinder. CNTs have diameters in the range of 1-10 nm. CNTs can be categorized into two types single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs). SWCNTs can be thought of as a single... 

On the basis of the number of concentric walls, CNTs can be divided into single-walled carbon nanotubes (SWCNTs) and multiwalled carbon nanotubes (MWCNTs) [22]. SWCNTs consist of a single rolled graphite sheet defining a cylinder of 0.4-2 nm of diameter and up to several microns long. MWCNTs can be visualized as concentric and closed graphite tubules with two (double-walled carbon nanotubes, DWCNTs) or several layers of graphite sheet that define a... 

Industrial Applications Carbon nanotubes (single-wall carbon nanotubes (SWCNT) and multi-wall carbon nanotubes (MWCNTs)) " " cellulose materials for bulky paper sheets graphene-based polymer nanocomposites materials/films " photonic materials photovoltaic devices polyaniline systems poly(dimethylsiloxane) (PDMS) oligomers poly(propylene imine) dendrimers " thin-films ... 

CNTs may consist of just one layer (i.e. single-walled carbon nanotubes, SWCNTs), two layers (DWCNTs) or many layers (MWCNTs) and per definition exhibit diameters in the range of 0.7 < d < 2 nm, 1 < d < 3 nm, and 1. 4 < d < 150 nm, respectively. The length of CNTs depends on the synthesis technique used (Section 1.1.4) and can vary from a few microns to a current world record of a few cm [16]. This amounts to aspect ratios (i.e. length/diameter) of up to 107, which are considerably larger than those of high-performance polyethylene (PE, Dyneema). The aspect ratio is a crucial parameter, since it affects, for example, the electrical and mechanical properties of CNT-containing nanocomposites. 

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