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The formation of a hybrid crystalline fibrils (shish), in which the carbon nanotubes (CNTs) are coated by polymer extended chain, is an effective route to couple polymers and CNTs together but needs extreme conditions like fiber spinning or stirring CNT/polymer solution. In this work, both the hybrid shish and homogeneous shish have been achieved in the extruded sheets of poly (l-lactic acid) (PLA)/CNT...
Carboxylic-acid functionalized multiwall carbon nanotubes (MWCNT-COOH) were first modified by (CH3O)3Si(CH2)3SO3H by an esterification reaction of the carboxylic-acid group with a methoxy group, then by hydrolyzing N,N-di(2-hydroxyethoxy)ethyl octadecylamine by an ion exchange reaction to form a quaternary ammonium salt as a soft shell of the MWCNTs. The modified MWCNTs had a larger diameter than...
Individually dispersed single-walled carbon nanotubes (SWCNTs) in aqueous solution were isolated from electrostatically tethered α-zirconium phosphate nanoplatelet dispersants by precipitating the nanoplatelets with an acid. By using an appropriate amount of acid along with either anionic or nonionic surfactants, about 80% of exfoliated, purified SWCNTs can be retrieved and stabilized in aqueous solution;...
The morphology, crystallization behavior, electrical conductivity, and thermal stability of polypropylene (PP) modified with disentangled multi-walled carbon nanotubes (MWCNTs) is reported. Slightly oxidized MWCNT clusters were disentangled in solution by mild sonication in the presence of exfoliated α-zirconium phosphate nanoplatelets. The disentangled MWCNTs were isolated using acid-induced coagulation...
Aqueous suspensions of single-walled carbon nanotubes (SWCNTs) with controlled degree of exfoliation were used to prepare conductive thin films. Controlled exfoliation was achieved by physical separation of SWCNT bundles using our previously established nanoplatelet-dispersion method. Thin film networks of individual SWCNTs produced with this approach exhibit universal conduction behavior indicative...
Using a combination of the bond order–length–strength correlation theory, the spin-polarized tight binding method, the first-principles calculations, and the atomistic photoelectron distillation experiments, we investigated the mechanisms of edge-selective generation and hydrogenated modulation of Dirac-Fermi polarons (DFPs) surrounding the atomic vacancies at a graphite surface and at the edges of...
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