Estimation of dispersion stability of UV/ozone treated multi-walled carbon nanotubes and their electrical properties

Kim, Seil; Lee, Young-In; Kim, Dong Hwan; Lee, Kun-Jae; Kim, Bum-Sung; Hussain, Manwar; Choa, Yong‐Ho

doi:10.1016/j.carbon.2012.08.062

Cited by 33 publications

(27 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7b) can be classified as dispersed in ethanol and water. These results suggest that the oxidation introduces polar groups (oxygen-containing groups) on the CNTs surface, which create the electrostatic stability required for a long time stable dispersion in polar solvents [14,20,26,27]. Presumably, electrostatic repulsion between the surface charges of the functionalized nanotube surface contributes to its stability [29].…”

Section: Resultsmentioning

confidence: 89%

“…Surface modifications and dispersion degree of functionalized carbon nanotubes have been reported by a great number of papers [14,15,26,27]. However, there has been no literature dealing with the effects of CNT functionalization by dodecylamine (DDA) on the dispersion stability in different solvents.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, although carbon nanotubes have promising applications, the development of cost-effective production techniques and a lack of effective dispersion technologies, particularly the poor dispersion in organic solvents and polymers, are problems that still remain unsolved [14]. The dispersion states of the carbon nanotubes involve complicated phenomena that are affected by at least two competitive interactions: the strong self-interaction of carbon nanotube due to van der Waals attraction and the interaction between carbon nanotube filaments and the dispersion medium [15].…”

Section: Introductionmentioning

confidence: 99%

“…Chemical functionalization by adding functional groups to the CNT surface is one of the most recognized and effective way to overcome these drawbacks [19]. Functional groups can be carboxyl, amino or alkane groups, which are not only an effective way to prevent the agglomeration, but also to improve the miscibility of CNTs with matrices by enhancing interfacial interactions through chemical bondings [14,20,21]. Furthermore, chemical modification broadens considerably the potential to develop new functional materials, structures and devices, for interesting and promising applications in various fields, including nanocomposites [22], sensors [23] and biomedical materials [24], due to the high reactivity and interesting chemical properties of the functionalized CNTs [25].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Carbon nanotube functionalized with dodecylamine for the effective dispersion in solvents

Ferreira

Francisco

Menezes

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Carbon nanotube functionalized with dodecylamine for the effective dispersion in solvents

Ferreira

Francisco

Menezes

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

“…On the other hand, the dispersion state of CNT-Ac (Figure 3b) can be classified as dispersed in ethanol and water. These results suggest that the oxidation introduces polar groups (oxygen-containing groups) on CNTs surface, creating the electrostatic stability required for a long time stable dispersion in polar solvents (Vukovic et al, 2009;Zhao et al, 2013;Kim et al, 2013;. Presumably, electrostatic repulsion between positive charges of functionalized CNTs with acid contributes to the stability (Behnama et al, 2013).…”

Section: Resultsmentioning

confidence: 91%

Untitled

FERREIRA¹,

FRANCISCO²,

CIVIDANES³

et al. 2015

Anais Do Congresso Brasileiro De Engenharia Química Em Iniciação Científica - Cobeq IC 2015

View full text Add to dashboard Cite

-In this work, a dispersion study of carbon nanotubes (CNTs) functionalized with carboxylic and alkanes groups in various solvents are performed. CNT was treated using H 2 SO 4 /HNO 3 , and functionalized subsequently by dodecylamine (DDA). The surface modification was confirmed by Fourier transform infrared and X-ray photoelectron spectroscopy. The thermal stabilities were studied by Thermogravimetric analysis. The dispersion state of CNTs in the solvents was based on visual observations. Evaluation of the solvent influence by itself was also made. Results confirmed the presence of oxygencontaining and alkanes groups on CNTs surfaces. Dispersion stability was strongly dependent on solvent and carbon nanotubes surface interactions, which can vary with the chemical nature of the solvent. The study of dispersion stability of the nanotubes with different solvents is relevant to the full understanding of its applications.

show abstract

Biomimetic Spider‐Web‐Like Composites for Enhanced Rate Capability and Cycle Life of Lithium Ion Battery Anodes

Bhattacharya

Kota

Suh

et al. 2017

Advanced Energy Materials

View full text Add to dashboard Cite

sluggish solid-state ion diffusion along the principal axis perpendicular to the basal plane, which makes LIBs inapplicable for high energy and power-demanding applications. [5] In order to overcome the low capacity of graphite, various transition metal oxides have been investigated due to their higher theoretical capacities, achieved via a conversion mechanism. However, the practical application of transition metal oxides in high energy LIBs is hindered by the poor cycling stability and rate capability of these oxides, which are respectively associated with the large volume changes that occur during the charge/discharge cycling and the low electronic conductivity. [6] Various carbonaceous materials, such as carbon nanotubes (CNTs), graphenes, porous carbon, hollow nanospheres, carbon capsules, graphene nanoribbons, and graphene nanosheets, have been used to resolve the aforementioned problems in the form of nanocomposites or hybrids due to their large surface area and extraordinary electronic and mechanical properties. [7][8][9][10][11][12] In particular, numerous approaches have been made to develop CNT/ metal oxide composites; [7] however, satisfactory performance has not yet been achieved. This is mainly due to the aggregation and bundling of the CNTs, arising from strong van der Waals and π-π interactions, which leads to loss of the available surface area and higher Li + ion diffusion resistance. The synergistic combination of a 3D architecture with heterocomposition may provide a large accessible area, alleviate the volume expansion, and create short solid-state diffusion pathways, resulting in the enhanced rate and cyclic capabilities. [13] Nonetheless, the strong attachment of the active materials onto the carbon supports and the proximate contact need to be achieved to exploit the synergistic advantages of both components. [14] Biomimetic design inspired by nature's structures and functions is of prime importance for resolving the existing technological challenges. Such biomimetic approaches have been employed to resolve issues related to the performances of energy storage devices and materials, which are otherwise difficult to overcome with conventional artificial methodologies. For instance, Liu and co-workers mimicked the structural design of the Gecko's foot to improve the adhesion between a copperbased current collector and graphitic anode material, thereby achieving a dramatic increase of the LIB lifespan. [15] Moreover, It is crucial to control the structure and composition of composite anode materials to enhance the cell performance of such anode materials for lithium ion batteries. Herein, a biomimetic strategy is demonstrated for the design of high performance anode materials, inspired by the structural characteristics and working principles of sticky spider-webs. Hierarchically porous, sticky, spider-web-like multiwall carbon nanotube (MWCNT) networks are prepared through a process involving ozonation, ice-templating assembly, and thermal treatment, thereby integrating the networks with γ-Fe 2...

show abstract

Estimation of dispersion stability of UV/ozone treated multi-walled carbon nanotubes and their electrical properties

Cited by 33 publications

References 27 publications

Carbon nanotube functionalized with dodecylamine for the effective dispersion in solvents

Carbon nanotube functionalized with dodecylamine for the effective dispersion in solvents

Untitled

Biomimetic Spider‐Web‐Like Composites for Enhanced Rate Capability and Cycle Life of Lithium Ion Battery Anodes

Contact Info

Product

Resources

About