Covalent functionalization of multiwalled carbon nanotubes with polybutadiene

Abstract

Covalent functionalization of multiwalled carbon nanotubes (MWNTs) with polybutadiene was accomplished by coupling of isocyanate‐decorated MWNTs with hydroxyl‐terminated polybutadiene (HTPB) in dry toluene. The MWNT precursor, isocyanate‐functionalized MWNTs, was prepared by directly reacting commercial hydroxyl functionalized MWNTs with excess toluene 2,4‐diisocyanate (TDI). HTPBs with different molecular weights (Mn = 1900, 2600, and 3600 g/mol) were subjected to this coupling reaction, resulting in the formation of polymer functionalized MWNTs. FTIR spectroscopy was utilized to follow the introduction and consumption of isocyanate groups on the MWNTs. Thermogravimetric analysis (TGA) indicated that HTPB was successfully grafted onto MWNT surface, with the final products having a polymer weight percentage of around 30 wt %. Transmission electron microscopy (TEM) was utilized to image the polymer functionalized MWNTs, showing relatively uniform polymer coatings presented on the surface of MWNTs. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

“…Modifiers should functionalize the fillers to improve their dispersion while exhibiting good compatibility with rubber or even covalently coupling onto rubber chains. Many intelligent modifiers have been developed, such as ionic liquids [42,43], toluene 2,4-diisocyanate [44], and silanes [45]. For example, the treatment of CNTs with γ-aminopropyltriethoxysilane can improve the dispersion of CNTs in rubber nanocomposites and enhance the compatibility between CNTs and rubber matrix, facilitating the formation of conductive networks and leading to remarkably enhanced electrical conductivity of the nanocomposite [46].…”

Self-powered piezoelectric sensor based on BaTiO3/MWCNTs/PVDF electrospun nanofibers for wireless alarm system

“…Meanwhile, the MWCNTs/PVDF (PVDF-BM-0) and BaTiO 3 /MWCNTs/PVDF (PVDF-BM-1 to PVDF-BM-3) electrospinning nanofibers began to lose weight at about 250 • C, which is due to the MWCNTs oxidation. The degradation of PVDF in BaTiO 3 /MWCNTs/PVDF occurs at about 430 • C. The BaTiO 3 with different contents does not influence the thermal stabilities of BaTiO 3 /MWCNTs/PVDF electrospinning nanofibers [50][51][52]. The stress-strain curves of pure PVDF and those BaTiO 3 /MWCNTs/PVDF flexible films indicate the tensile strength of PVDF-BM-0 is the best in those flexible films (figure 2(f)).…”

The Separation Power of Nanotubes in Membranes: A Review

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