Green chemical functionalization of multiwalled carbon nanotubes with poly(ɛ-caprolactone) in ionic liquids

Preparation and characterization of activated charcoals from a new source: Feather

“…As shown in Fig. 2, the main peaks for the samples are at 3435, 1742, 1600, 1300-1000, 900-700 cm À 1 , which corresponds to the presence of -OH (carboxyl and phenol functional groups) [7], CQO (carboxylic acid) [8], C-C and C-O (acids, alcohols, phenols and esters) [9] and C-H (aromatic substitution) [10].…”

Greening Electroanalytical Methods

“…For example, poly(ε-caprolactone)-grafted MWNTs (MWNT-g-PCL) were synthesized by in situ ring-opening polymerization of ε-caprolactone in the presence of MWNT-OH in room temperature ionic liquids (RTILs). The use of 1-n-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF 4 ) as solvent cannot only improve the dispersability and stability of nanotubes during polymerization, but also enhance the functionalization effectiveness as a result of higher polymerization rate and amount of the grafted-polymer compared to general organic solvents [58]. Wrapping is another useful functionalization alternative without modifying the sp 2 structure of nanotubes.…”

Progress in Imidazolium Ionic Liquids Assisted Fabrication of Carbon Nanotube and Graphene Polymer Composites

“…All functionalized-CNTs show much better solubility and stability than pristine ones in solvents. In addition, the use of Imi-ILs as reaction media can enhance the reaction rate and grafting amount of polymer compared to conventional solvents [49]. More importantly, the production of stable homogeneous suspensions of CNTs in Imi-ILs without external dispersants emerges as a powerful strategy toward fabricating polymer composites.…”

“…This reaction occurs in minutes at room temperature, and is an extremely rapid and mild green protocol to exfoliate and functionalize SWCNTs. Imi-ILs have been successfully used as green media for the functionalization of SWCNTs and MWCNTs with various polymers, such as PCL [49], poly(N-succinimidyl acrylate) [78], poly(methylpyrrole) [79] and polyaniline [80]. All functionalized-CNTs show much better solubility and stability than pristine ones in solvents.…”

“…Over the past years, we have found that MWCNTs functionalized by organic molecules [42,43], polystyrene (PS) [44,45], hyperbranched poly(urea-urethane) [46,47], biodegradable poly(ε-caprolactone) (PCL) [48,49], azobenzene-containing polyurethane [50] and ionic polymers [51] are well soluble in water or organic solvents. MWCNTs after functionalization can be uniformly dispersed and well bonded to the polymer matrix [52,53].…”