Evidence of sidewall covalent functionalization of single-walled carbon nanotubes and its advantages for composite processing

Vigolo, Brigitte; Mamane, Victor; Valsaque, Fabrice; Le, Tai; Thabit, Jaouad; Ghanbaja, Jaâfar; Aranda, Lionel; Fort, Yves; McRae, E.

doi:10.1016/j.carbon.2008.10.024

Cited by 60 publications

(36 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless a major difficulty remains in the control of both nanotubes dispersion into the polymer matrix and interaction between the matrix and the nanotubes. The functionalization of the CNT surface is an interesting way to improve both the ability to disperse the nanotubes homogeneously throughout the matrix and to transfer the physical and electronic properties from the nanotubes fillers to the matrix [13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic study of double-walled carbon nanotube functionalization for preparation of carbon nanotube / epoxy composites

León

Parret

Robert

et al. 2012

Carbon

View full text Add to dashboard Cite

A spectroscopic study of the amino functionalization of double-walled carbon nanotube (DWCNT) is performed. Original experimental investigations by near edge X-ray absorption fine structure spectroscopy at the C and O K-edges allow one to follow the efficiency of the chemistry during the different steps of covalent functionalization. Combined with Raman spectroscopy, the characterization gives a direct evidence of the grafting of amino-terminated molecules on the structural defects of the DWCNT external wall, whereas the internal wall does not undergo any change. Structural and mechanical investigation of the amino functionalized DWCNT / epoxy composites show coupling between epoxy molecules and the DWCNTs. Functionalization improves the interface between aminofunctionalized DWCNT and the epoxy molecules. The electrical transport measurements indicate a percolating network formed only by inner metallic tubes of the DWCNTs. The activation energy of the barriers between connected metallic tubes is determined around 20 meV.

show abstract

Section: Introductionmentioning

confidence: 99%

Spectroscopic study of double-walled carbon nanotube functionalization for preparation of carbon nanotube / epoxy composites

León

Parret

Robert

et al. 2012

Carbon

View full text Add to dashboard Cite

show abstract

“…In the case of SWCNTs, covalent functionalization is used to break C=C double bonds, and to attach functional groups. Many examples can be found of functionalized SWCNTs, such as grafting of p-methoxyphenyl [82], functionalization with adenosine monophosphate [83], covalent addition of 4-benzo-9-crown-3 ether diazonium salt [84], and many more. Noncovalent modifications are also applied [85], although these are very specific for given applications such as dispersing SWCNTs in a water matrix [86].…”

Section: Categories Of Carbon Nanotubesmentioning

confidence: 99%

The Separation Power of Nanotubes in Membranes: A Review

Bruggen

2012

ISRN Nanotechnology

View full text Add to dashboard Cite

Research on mixed matrix membranes in which nanoparticles are used to enhance the membrane's performance in terms of flux, separation, and fouling resistance has boomed in the last years. This review probes on the specific features and benefits of one specific type of nanoparticles with a well-defined cylindrical structure, known as nanotubes. Nanotube structures for potential use in membranes are reviewed. These comprise mainly single-wall carbon nanotubes (SWCNTs) and multiwall carbon nanotubes (MWCNTs), but also other structures and materials, which are less studied for membrane applications, can be used. Important issues related to polymer-nanotube interactions such as dispersion and alignment are outlined, and a categorization is made of the resultant membranes. Applications are reviewed in four different areas, that is, gas separation, water filtration, drug delivery, and fuel cells.

show abstract

“…High functionalization levels might lead to both a strong damage of the CNT structure and a disruption of the conjugated π system of CNTs thereby having a negative impact on their intrinsic properties (conductivity, mechanical properties) [23–25]. Low functionalization levels are indisputably preferred for CNT based composites [26]. …”

Section: Introductionmentioning

confidence: 99%

Chemi- vs physisorption in the radical functionalization of single-walled carbon nanotubes under microwaves

Mamane¹,

Mercier²,

Shukor³

et al. 2014

Beilstein J. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

SummaryThe effect of microwaves on the functionalization of single-walled carbon nanotubes (SWNTs) by the diazonium method was studied. The usage of a new approach led to the identification of the strength of the interaction (physical or chemical) between the functional groups and the carbon nanotube surface. Moreover, the nature (chemical formula) of the adsorbed/grafted functional groups was determined. According to thermogravimetric analysis coupled with mass spectrometry and Raman spectroscopy, the optimal functionalization level was reached after 5 min of reaction. Prolonged reaction times can lead to undesired reactions such as defunctionalization, solvent addition and polymerization of the grafted functions. The strength (chemi- vs physisorption) of the bonds between the grafted functional groups and the SWNTs is discussed showing the occurrence of physical adsorption as a consequence of defunctionalization after 15 min of reaction under microwaves. Several chemical mechanisms of grafting could be identified, and it was possible to distinguish conditions leading to the desired chemical grafting from those leading to undesired reactions such as physisorption and polymerization.

show abstract

Evidence of sidewall covalent functionalization of single-walled carbon nanotubes and its advantages for composite processing

Cited by 60 publications

References 36 publications

Spectroscopic study of double-walled carbon nanotube functionalization for preparation of carbon nanotube / epoxy composites

Spectroscopic study of double-walled carbon nanotube functionalization for preparation of carbon nanotube / epoxy composites

The Separation Power of Nanotubes in Membranes: A Review

Chemi- vs physisorption in the radical functionalization of single-walled carbon nanotubes under microwaves

Contact Info

Product

Resources

About