An improved method for functionalisation of carbon nanotube spun yarns with aryldiazonium compounds

Cai, Jackie Y.; Min, Jie; McDonnell, Jill; Church, Jeffrey S.; Easton, Christopher D.; Humphries, William; Lucas, Stuart; Woodhead, Andrea L.

doi:10.1016/j.carbon.2012.05.055

Cited by 51 publications

(27 citation statements)

References 25 publications

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“…Although significant, the I D / I G variation remains modest, probably because we used commercially available SWCNTs exhibiting a rather poor purity grade (70 %) and no further purification has been made with these materials. Similar observations in relation with the nanotubes purity have been reported in a recent work . It can be also noted that the I D / I G ratio found here is close to those reported by Tour et al.…”

Section: Resultssupporting

confidence: 93%

“…Similaro bservations in relation with the nanotubes purity have been reported in ar ecent work. [42] It can be also noted that the I D /I G ratio found here is close to those reportedb yT our et al fort he functionalization of SWCNTsf rom isolated aryldiazonium salts in different ionic liquids. [19] The Raman spectra for the cf-SWCNTsp oint to the covalent functionalization of the carbon nanotubes.…”

Section: Functionalization Of Carbon Nanotubes-chemical Graftingsupporting

confidence: 90%

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Functionalization of Carbon Materials by Reduction of Diazonium Cations Produced in Situ in a Brønstedt Acidic Ionic Liquid

et al. 2016

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The imidazolium‐based acidic ionic liquid 1‐butyl‐3‐methylimidazolium hydrogensulfate, [BMIm][HSO4], is used for the grafting of carbon materials, allowing the nitrobenzene diazonium cations to be simply produced in situ. An appealing self‐limiting and self‐patching process occurs in this viscous ionic liquid. Even for low electrolysis charge consumption, the layers are particularly dense and compact at atomic force microscopy resolution. The grafting method is further extended to carbon nanotubes, following either an electrochemical or a chemical route. A bucky paste is easily obtained from [BMIm][HSO4] and carbon nanotubes that could coat a graphite electrode surface. This simple soft method allows: 1) in situ electrografting of carbon nanotubes in [BMIm][HSO4] and/or 2) easy‐to‐handle electrochemical characterizations of the functionalized carbon nanotubes. The covalent functionalization of single‐walled carbon nanotubes is further assessed by Raman spectroscopy.

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Section: Resultssupporting

confidence: 93%

Section: Functionalization Of Carbon Nanotubes-chemical Graftingsupporting

confidence: 90%

Functionalization of Carbon Materials by Reduction of Diazonium Cations Produced in Situ in a Brønstedt Acidic Ionic Liquid

et al. 2016

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“…Salts are also utilized to disperse CNTs in water [112]. As an example, aryl diazonium salts are frequently introduced as organic intermediates in radical addition of CNTs [115]. Results show that the functionalization promotes the accessibility to spun CNTs enabling a more extensive and uniform additional modifications.…”

Section: Carbon Nanotubesmentioning

confidence: 99%

The Role of Functionalization in the Applications of Carbon Materials: An Overview

Speranza

2019

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The carbon-based materials (CbMs) refer to a class of substances in which the carbon atoms can assume different hybridization states (sp 1 , sp 2 , sp 3 ) leading to different allotropic structures -. In these substances, the carbon atoms can form robust covalent bonds with other carbon atoms or with a vast class of metallic and non-metallic elements, giving rise to an enormous number of compounds from small molecules to long chains to solids. This is one of the reasons why the carbon chemistry is at the basis of the organic chemistry and the biochemistry from which life on earth was born. In this context, the surface chemistry assumes a substantial role dictating the physical and chemical properties of the carbon-based materials. Different functionalities are obtained by bonding carbon atoms with heteroatoms (mainly oxygen, nitrogen, sulfur) determining a certain reactivity of the compound which otherwise is rather weak. This holds for classic materials such as the diamond, the graphite, the carbon black and the porous carbon but functionalization is widely applied also to the carbon nanostructures which came at play mainly in the last two decades. As a matter of fact, nowadays, in addition to fabrication of nano and porous structures, the functionalization of CbMs is at the basis of a number of applications as catalysis, energy conversion, sensing, biomedicine, adsorption etc. This work is dedicated to the modification of the surface chemistry reviewing the different approaches also considering the different macro and nano allotropic forms of carbon.C 2019, 5, 84 3 of 45 narrow graphite-like interconnected layers. This leads to a closed pore rigid structure that is chemically inert, hard but brittle [48][49][50].Due to the highly resistant, conductive, and inert network, glassy carbons are utilized in a series of rather different applications. They are utilized as electrodes in solid state batteries and in industrial harsh chemical processes where also high temperatures are involved such as crystallization of CaF2, CdS and ZnS. Glassy carbon can be utilized to manufacture high temperature furnace elements. Due to the chemical inertness, glassy carbons are utilized also in fabrication of protheses. Porous carbon and carbon black are much softer. Generally, in industrial applications important is the extension of the surface which is exposed to the external environment. The porous carbon is characterized by a high specific surface area enhancing the interaction with the external medium. Although it possesses a lower conductivity with respect to glassy carbon, the high porosity and the presence of active sites makes it a good material to fabricate electrodes for applications in electrochemistry [51][52][53] and bioelectrodes for sensing and stimulation [54,55].The same holds for the carbon black mainly utilized as additive in rubbers and polymers to improve their mechanical properties, or as a pigment [56] although new potentialities have been recently envisaged [57].Common to all the forms of carbon which are bri...

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Section: Applications Of Functionalized Carbon Materialsmentioning

confidence: 99%

“…Application of diazonium salts in spinning of CNTs is assisted by the addition of surfactant in order to form a negatively charged CNTs surface for better interaction with the positively charged diazonium [212,213]. The CNT yarns with diazonium salt functionalization demonstrate better tenacity and strength against the untreated CNT yarns [212]. Additionally, the diazonium salt grafted carboxyphenyl groups can react with multifunctional reactive compounds such as hexa(methoxymethyl) melamine, constructing highly crosslinking polymerization within the yarns, enabling higher tensile strength, Young's modulus and therefore load transfer efficiency [213].…”

Section: Applications Of Functionalized Carbon Materialsmentioning

confidence: 99%

Surface functionalization design of carbon materials based heterogeneous catalysis for selective oxidative transformations

Yan¹

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I have to show gratitude to my families, including my mother for her sincere understanding and backing. I also have to thank the School of Chemical and Biomedical Engineering, Nanyang Technological University for the scholarship support. Last but not least, I need to show my genuine gratitude to Professor Yanhui Yang, my Ph.D. supervisor, because he always provides most valuable suggestions; because he trusts me and permits me to do everything I want to with sufficient funding and professional conditions in lab.

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An improved method for functionalisation of carbon nanotube spun yarns with aryldiazonium compounds

Cited by 51 publications

References 25 publications

Functionalization of Carbon Materials by Reduction of Diazonium Cations Produced in Situ in a Brønstedt Acidic Ionic Liquid

Functionalization of Carbon Materials by Reduction of Diazonium Cations Produced in Situ in a Brønstedt Acidic Ionic Liquid

The Role of Functionalization in the Applications of Carbon Materials: An Overview

Surface functionalization design of carbon materials based heterogeneous catalysis for selective oxidative transformations

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