Structure and Oxidation Patterns of Carbon Nanotubes

Yao, Nan; Lordi, Vincenzo; C., S. X.; Dujardin, Erik; Krishnan, A.; Treacy, M.M.J.; Ebbesen, Thomas W.

doi:10.1557/jmr.1998.0338

Cited by 122 publications

(73 citation statements)

References 28 publications

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“…Thus, in MWNTs, it is expected that the reaction of ozone occurs initially and is localized at the end caps and at defect sites, because the end caps have higher curvature and are thus more reactive than the sidewalls. [9,33,50] As a result, it is expected that the ends of the tube become heavily functionalized with oxygenated functional groups, such as ketone, carboxylic acids, and alcohol groups. [19,29,34] …”

Section: Tem Studiesmentioning

confidence: 99%

Surface Chemistry and Structure of Purified, Ozonized, Multiwalled Carbon Nanotubes Probed by NEXAFS and Vibrational Spectroscopies

et al. 2004

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Understanding of oxidative processes such as solution-phase ozonolysis in multiwalled carbon nanotubes (MWNTs) is of fundamental importance in devising applications of these tubes as components in composite materials, as well as for development of cutting and filling protocols. We present here an evaluation of various spectroscopic tools to study the structure and composition of functionalized nanotubes. We demonstrate near-edge X-ray absorption fine structure (NEXAFS) spectroscopy as a particularly useful and effective technique for studying the surface chemistry of carbon nanotubes.

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Section: Tem Studiesmentioning

confidence: 99%

Surface Chemistry and Structure of Purified, Ozonized, Multiwalled Carbon Nanotubes Probed by NEXAFS and Vibrational Spectroscopies

et al. 2004

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“…Одним з важливих чинників ефективного поліпшення влас-тивостей полімеру є введення ВНТ, які мають вели-ку питому площу поверхні, що сприяє кращій адгезії з полімерною матрицею [10] порівняно з традиційни-ми полімерними композитами. Полімерні наноком-позити, які наповнені ВНТ, легко готуються завдяки малому діаметру наповнювача [16]. Використання ВНТ як наповнювача створює значні можливості для розробки нових багатофункціональних матеріалів з широким спектром застосувань у промисловості [9].…”

Section: аналіз останніх публікацій і дослідженьunclassified

Analysis of thermophysical properties of polymer nanocomposites based on polypropylene

Dinzhos¹,

Fialko²,

Рехтета³

et al. 2015

Collection of Scientific Publications NUS

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Abstract. Polymer nanocomposites (PNC) as a new class of materials is the object of intensive research during the last decade. The growth of interest in the study of these systems is explained by their better mechanical durability and higher thermal stability in comparison with the unfilled polymers. The improvement of the characteristics of the polymer takes place already at the insertion of a small amount of filler (~ 1 -5 %) in it. The main advantages of these materials are light weight, corrosion resistance, ease of treatment, cheap filler etc. Nowadays, the majority of the heat power complex products are manufactured on the basis of polymer composite materials (PCM) which contain microparticles. The use of the nanofillers allows developing a PCM with the same set of functional characteristics that the PCM with micro particles has, but at the lower filler content. Polymer nanocomposites (PNC) are not only of practical interest, but also of a fundamental one, as nanofillers have a greater specific surface area which polymer chains interact. Therefore, the main studies in this direction have recently been focused on the improvement of synthesis methods and characterization of physical properties of polymer nanocomposites. Carbon nanotubes (CNT) are of considerable interest for many technologies. CNT have high elasticity, strength and stringiness, so that they can be used in a wide variety of nanocomposites, including the polymer ones. One of the most important factors of the effective improvement of the polymer properties is the insertion of carbon nanotubes which have large specific surface area, that promotes better adhesion with the polymer matrix, in comparison with conventional polymer composites. Polymer nanocomposites filled with carbon nanotubes can be easily made due to the small diameter of the filler. The use of carbon nanotubes as a filler provides wide possibilities for the development of new multifunctional materials with a wide range of applications in industry. Currently, there is no systematic information on the impact of carbon nanotubes on the processes of structure formation of polymer composites and thermal properties of polymer nanocomposites obtained on their basis. Considering the above mentioned, the study of the impact of carbon nanotubes on the structure and thermal properties of the composites on their basis is urgent. Keywords: polypropylene/carbon nanotube; nanocomposite; non-isothermal crystallization; crystallization enthalpy; crystallization temperature.Анотація. Представлено результати експериментальних і розрахункових досліджень кінетики неізотермічної кристалізації ізотактичного поліпропілену (ПП-0) і нанокомпозитів, які містять 0,5 (ПП-0,5); 1 (ПП-1); 2 (ПП-2); 5 (ПП-5); 10 (ПП-10); 20 (ПП-20) мас. % вуглецевих нанотрубок. Виконано аналіз термодинамічних параметрів залежно від процентного вмісту вуглецевих нанотрубок. Вивчено особливості впливу структури полімерних нанокомпозитів на їх теплофізичні властивості.

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“…Carbon nanotubes (CNTs) continue to attract a great deal of interest in polymer reinforcement owing to their outstanding mechanical, electrical and thermal properties, nanoscale dimensions, low mass density, excellent physical characteristics and high aspect ratio [1][2][3][4]. A good dispersion of CNTs in a polymer matrix is the key to improve the properties of CNT/polymer composites.…”

Section: Introductionmentioning

confidence: 99%

The effects of surface modifications of multiwalled carbon nanotubes on their dispersibility in different solvents and poly(ether ether ketone)

et al. 2014

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The effects of surface modifications of multi-walled carbon nanotubes (MWCNTs) on their dispersibility in different solvents and poly (ether ether ketone) (PEEK) have been studied. MWCNTs were treated by mixed acids to obtain acid-functionalized MWCNTs. The acid-functionalized MWCNTs were modified with six different chemical agents separately, 1,6-diaminohexane, hexadecyl trimethyl ammonium bromide, silane coupling agent 3-aminopropyltriethoxysilane, anhydrous sulfanilic acid and ethanolamine. MWCNT/PEEK composite films were fabricated in order to explore systematically the dispersibility of differently modified MWCNTs in PEEK as well as in different solvents. The morphology and structures of MWCNTs and the compatibility between MWCNTs and PEEK have been investigated. It was observed that the MWCNTs modified with anhydrous sulfanilic acid have an excellent dispersion in the PEEK grafted by sulfonic acid groups and that the MWCNTs modified with ethanolamine are also dispersed well in pure PEEK. The results herein provide useful insights into the development of MWCNT/PEEK composites for a wide variety of applications.

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Structure and Oxidation Patterns of Carbon Nanotubes

Cited by 122 publications

References 28 publications

Surface Chemistry and Structure of Purified, Ozonized, Multiwalled Carbon Nanotubes Probed by NEXAFS and Vibrational Spectroscopies

Surface Chemistry and Structure of Purified, Ozonized, Multiwalled Carbon Nanotubes Probed by NEXAFS and Vibrational Spectroscopies

Analysis of thermophysical properties of polymer nanocomposites based on polypropylene

The effects of surface modifications of multiwalled carbon nanotubes on their dispersibility in different solvents and poly(ether ether ketone)

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