Search results for "CNT"
showing 6 items of 66 documents
Rheological behaviour of ultrahigh molecular weight polyethylene/functionalized-MWCNTs nanocomposites
2013
Mechanical Performance of CNT Fibres
2014
The initial strength hype over carbon nanotubes arose from predictions of the strength of individual graphene layers, encouraged by measurements of individual MWCNTs and SWCNT bundles in AFM. The challenge for fibres composed of carbon nanotubes (CNTs) is to translate the impressive properties of the individual carbon nanotubes into the fibres. Yarn-like fibres composed of carbon nanotubes made by the direct spinning process have been used as the subject of this study. There have been occasional observations of strengths greater than 5 N/tex, which have served to maintain the enthusiasm for on-going developments. Here, we will re-examine those reports in the context of the response of nanot…
Grafting of polymer chains on the surface of carbon nanotubes via nitroxide radical coupling reaction
2016
Poly(butylene succinate)/MWCNTs nanocomposites with improved dispersion and with nanotubes embedded/immobilized into the polymer matrix were here prepared by an alternative "grafting to" method based on thenitroxide radical coupling reaction. Poly(butylene succinate) (PBS) was grafted on the surface of TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy) modified multi-walled carbon nanotubes (MWCNTs) via a nitroxide radical coupling reaction. TEMPO functionalized MWCNTs (MWCNTs-g-TEMPO) were synthesized using the Cu(I)-catalyzed azide/alkyne click chemistry approach and the covalent bond of the nitroxide moieties onto the MWCNTs was confirmed via electron paramagnetic resonance (EPR) spectroscopy.…
Fragua Social. Prensa, cultura y movilización en la CNT valenciana (1936-1939)
2015
Este estudio aborda la historia del diario valenciano Fragua Social, órgano de expresión del Comité Regional de Levante y del Comité Nacional de la CNT durante la guerra civil española de 1936 a 1939. Pretende completar y renovar los conocimientos sobre la CNT valenciana desde un enfoque cultural, y determinar su relación con la organización nacional y con las otras fuerzas sindicales y políticas durante los tres años que duró la guerra. Analiza el contenido formal del diario, la evolución de la publicación y las características del discurso y de la cultura política anarcosindicalista de la CNT de Levante expresada en Fragua Social. También elabora los perfiles biográficos de sus principale…
Sonication-Induced Modification of Carbon Nanotubes: Effect on the Rheological and Thermo-Oxidative Behaviour of Polymer-Based Nanocomposites.
2018
The aim of this work is the investigation of the effect of ultrasound treatment on the structural characteristics of carbon nanotubes (CNTs) and the consequent influence that the shortening induced by sonication exerts on the morphology, rheological behaviour and thermo-oxidative resistance of ultra-high molecular weight polyethylene (UHMWPE)-based nanocomposites. First, CNTs have been subjected to sonication for different time intervals and the performed spectroscopic and morphological analyses reveal that a dramatic decrease of the CNT's original length occurs with increased sonication time. The reduction of the initial length of CNTs strongly affects the nanocomposite rheological behavio…