Dispersion of single-walled carbon nanotubes in aqueous and organic solvents through a polymer wrapping functionalization

High thermal conductivity of poly(vinylidene fluoride)/carbon nanotubes nanocomposites achieved by adding polyvinylpyrrolidone

“…However, apparent deposition phenomenon is observed for the pristine CNTs. Factually, the deposition can be even observed after being placed for only 24 h. This clearly proves that PVP is a good dispersant to improve and stabilize the dispersion of CNTs possibly due to the special interfacial interaction between PVP and CNTs [26] and the hydrogen bonding between PVP and water [19]. The TEM image of PVP-treated CNTs is shown in Fig.…”

“…From Fig. 5 one can see that CNTs are wrapped by a thin layer of PVP [19,20]. Especially, PVP has the similar main chain structure to that of polyethylene.…”

“…Many researchers have shown that PVP can improve the dispersion of CNTs through helical wrapping way [19,20]. It has been already proved that PVP also improves the dispersion of CNTs in polymer matrix, leading to the improvement of mechanical properties as compared with the nanocomposites containing untreated CNTs [21].…”

Preparation of semiconductor-enriched single-walled carbon nanotube dispersion using a neutral pH water soluble chitosan derivative

“…The free electron pair in the pendant amine and amide groups of NACHI plays a vital role in the selective dispersion of semiconductor nanotubes and debundling down to individual nanotube size or thin bundles of 2-3 nanotubes. The very low intensity of disorder induced D-band at 1298 cm À1 for SWNT-NACHI supernatant shows that the polymer is physically attached on the nanotube surface without altering the intrinsic electronic structure [41].…”

Nanoparticle-Liquid Crystalline Elastomer Composites

“…For CNTs, covalent modification usually causes damage to the nanotubes, leading to deterioration of their electrical and optical properties. Many surface-active molecules have been developed with the intention of de-bundling pristine CNTs in aqueous solutions [66], and organic solvents [67]. Very few of these, however, can be used to help the dispersion of CNTs into LCEs; this is because they have a tendency to disrupt the liquid crystalline order.…”