Hydrodynamic Characterization of Surfactant Encapsulated Carbon Nanotubes Using an Analytical Ultracentrifuge

A novel phosphorus-silicon containing flame-retardant DOPO-V-PA was used to wrap carbon nanotubes (CNTs). The results of FTIR, XPS, TEM and TGA measurements exhibited that DOPO-V-PA has been successfully grafted onto the surfaces of CNTs, and the CNTs-DOPO-V-PA was obtained. The CNTs-DOPO-V-PA was subsequently incorporated into epoxy resin (EP) for improving the flame retardancy and dispersion. Compared with pure EP, the addition of 2 wt% CNTs-DOPO-V-PA into the EP matrix could achieve better flame retardancy of EP nanocomposites, such as a 30.5% reduction in peak heat release rate (PHRR) and 8.1% reduction in total heat release (THR). Furthermore, DMTA results clearly indicated that the dispersion for CNTs-DOPO-V-PA in EP matrix was better than pristine CNTs.

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Optical Absorption Spectroscopy of DNA-Wrapped HiPco Carbon Nanotubes

Materials Science Forum ◽

10.4028/www.scientific.net/msf.943.95 ◽

2019 ◽

Vol 943 ◽

pp. 95-99

Author(s):

Li Jun Wang ◽

Kazuo Umemura

Keyword(s):

Carbon Nanotubes ◽

Aqueous Solution ◽

Optical Absorption ◽

Absorption Spectroscopy ◽

Near Infrared ◽

Nir Spectroscopy ◽

Optical Characterization ◽

Optical Absorption Spectroscopy ◽

Double Stranded Dna

Optical absorption spectroscopy provides evidence for individually dispersed carbon nanotubes. A common method to disperse SWCNTs into aqueous solution is to sonicate the mixture in the presence of a double-stranded DNA (dsDNA). In this paper, optical characterization of dsDNA-wrapped HiPco carbon nanotubes (dsDNA-SWCNT) was carried out using near infrared (NIR) spectroscopy and photoluminescence (PL) experiments. The findings suggest that SWCNT dispersion is very good in the environment of DNA existing. Additionally, its dispersion depends on dsDNA concentration.

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Synthesis and Characterization of Poly(2,5-benzimidazole) (ABPBI) Grafted Carbon Nanotubes

MRS Proceedings ◽

10.1557/proc-1240-ww09-02 ◽

2009 ◽

Vol 1240 ◽

Cited By ~ 1

Author(s):

Ji-Ye Kang ◽

Su-Mi Eo ◽

Loon-Seng Tan ◽

Jong-Beom Baek

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Interfacial Adhesion ◽

Synthesis And Characterization ◽

Acylation Reaction ◽

Single Walled Carbon Nanotube ◽

Mechanical And Electrical Properties ◽

Multi Walled Carbon Nanotube

AbstractSingle-walled carbon nanotube (SWCNT) and multi-walled carbon nanotube (MWCNT) were functionalized with 3,4-diaminobenzoic acid via “direct” Friedel-Crafts acylation reaction in PPA/P2O5 to afford ortho-diamino-functionalized SWCNT (DIF-SWCNT) and MWCNT (DIF-MWCNT). The resultant DIF-SWCNT and DIF-MWCNT showed improved solubility and dispersibility. To improve interfacial adhesion between CNT and polymer matrix, the grafting of ABPBI onto the surface of DIF-SWCNT (10 wt%) or DIF-MWCNT (10 wt%) was conducted by simple in-situ polymerization of AB monomer, 3,4-diaminobenzoic acid dihydrochloride, in PPA. The resultant ABPBI-g-MWCNT and ABPBI-g-SWCNT showed improved the mechanical and electrical properties.

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Synthesis, electrical and magnetic characterization of core–shell silicon carbo-nitride coated carbon nanotubes

Materials Letters ◽

10.1016/j.matlet.2009.08.025 ◽

2009 ◽

Vol 63 (28) ◽

pp. 2435-2438 ◽

Cited By ~ 11

Author(s):

Gurpreet Singh ◽

Shashank Priya ◽

Maria R. Hossu ◽

Sandeep R. Shah ◽

Sachit Grover ◽

...

Keyword(s):

Carbon Nanotubes ◽

Core Shell ◽

Magnetic Characterization ◽

Coated Carbon

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Formation Of Single-Wall Carbon Nanotubes Forrest Assemblies On Metal Surfaces

MRS Proceedings ◽

10.1557/proc-734-b5.4 ◽

2002 ◽

Vol 734 ◽

Author(s):

Debjit Chattopadhyay ◽

Izabela Galeska ◽

Fotios Papadimitrakopoulos

Keyword(s):

Carbon Nanotubes ◽

Surface Coverage ◽

Iron Hydroxide ◽

Growth Characteristics ◽

Self Organization ◽

Single Wall Carbon Nanotubes ◽

Unique Challenge ◽

Single Wall Carbon ◽

Topological Characteristics

ABSTRACTLearning how to purify and manipulate single wall carbon nanotubes (SWNTs) presents a unique challenge in material science. The processing-related difficulties of these long nano-fibers stem from their high aspect ratio, rigidity and the profound hydrophobic attractions along their tubular walls. Shortening them into discrete segments, with lengths from tens to hundreds of nanometers, presents a viable methodology to alleviate the shape-induced intractability. In addition, the metal-assisted self-organization of these nanosized objects into nano-forest geometries with dense perpendicular surface grafting, demonstrates that such nanosized objects hold significant promise for the development of nanoscale devices. This paper will present an extensive characterization of the topological characteristics of these assemblies, along with their surface coverage, growth characteristics and height fluctuation on iron hydroxide substrates.

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