Polymer/surfactant mixtures as dispersants and non-covalent functionalization agents of multiwalled carbon nanotubes: synergism, morphological characterization and molecular picture

2021 ◽  
pp. 118338
Author(s):  
Bárbara Abreu ◽  
Ana Sofia Pires ◽  
Andreia Guimarães ◽  
Ricardo M.F. Fernandes ◽  
Isabel S. Oliveira ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Morphological Characterization ◽  
Surfactant Mixtures ◽  
Covalent Functionalization ◽  
Multiwalled Carbon ◽  
Polymer Surfactant ◽  
Molecular Picture

Covalent functionalization of multiwalled carbon nanotubes with super-hydrophobic property

2018 ◽  
Vol 38 (6) ◽  
pp. 537-543 ◽  
Author(s):  
Minghua Li ◽  
Zhiyuan Xu ◽  
Jinyang Chen ◽  
San-E Zhu
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Chemical Interaction ◽  
Hydrophobic Property ◽  
Covalent Functionalization ◽  
Multiwalled Carbon ◽  
Surface Contact Angle ◽  
Loading Ratio ◽  
Functionalized Mwcnts

AbstractSurface covalent functionalization of multiwalled carbon nanotubes (MWCNTs) is carried out by coupling of isocyanate-decorated MWCNTs with hydroxyl-terminated polydimethylsiloxane (HTPS), resulting in the formation of functionalized MWCNTs. Thermogravimetry analysis (TGA) of functionalized MWCNTs-1,2,3 exhibits the similar peaks in the temperature range of 200–500°C, which all correspond to the degradation of chemically grafted polyurethane on the nanotube surface. Field emission scanning electron microscopy (FE-SEM) reveals that as the polyurethane grafted onto the surface of MWCNTs loading ratio increased, the surface roughness of the MWCNTs is reduced. The chemical interaction of HTPS with isocyanate-decorated nanotube surface using the grafting-to strategy in a one-step process is confirmed by Fourier transform infrared spectroscopy (FT-IR). The surface contact angle of MWCNTs-3 with the largest content of polyurethane reached 171°, indicating that the surface covered with low surface energy polyurethane shows a super-hydrophobic property. The good dispersion of polyurethane-functionalized MWCNT-3, particularly at high content in the NR nanocomposites, is evidenced from transmission electron microscopy (TEM).

scholarly journals Controlled Covalent Functionalization of Multiwalled Carbon Nanotubes using [4 + 2] Cycloaddition of Benzocyclobutenes

2007 ◽  
Vol 19 (26) ◽  
pp. 6370-6372 ◽  
Author(s):  
Georgios Sakellariou ◽  
Haining Ji ◽  
Jimmy W. Mays ◽  
Nikos Hadjichristidis ◽  
Durairaj Baskaran
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Covalent Functionalization ◽  
Multiwalled Carbon

Covalent Functionalization of Multiwalled Carbon Nanotubes with Poly(acrylic acid)

2006 ◽  
Vol 24 (4) ◽  
pp. 563-568 ◽  
Author(s):  
Yan-Xin Liu ◽  
Zhong-Jie Du ◽  
Yan Li ◽  
Chen Zhang ◽  
Hang-Quan Li
Keyword(s):  
Carbon Nanotubes ◽  
Acrylic Acid ◽  
Multiwalled Carbon Nanotubes ◽  
Covalent Functionalization ◽  
Multiwalled Carbon ◽  
Poly Acrylic Acid

Covalent Functionalization of Multiwalled Carbon Nanotubes with a Low Molecular Weight Chitosan

2007 ◽  
Vol 8 (2) ◽  
pp. 322-326 ◽  
Author(s):  
Gang Ke ◽  
Wenchao Guan ◽  
Changyu Tang ◽  
Wenjie Guan ◽  
Danlin Zeng ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Weight ◽  
Multiwalled Carbon Nanotubes ◽  
Low Molecular Weight ◽  
Covalent Functionalization ◽  
Multiwalled Carbon ◽  
Low Molecular Weight Chitosan

Electrical and morphological characterization of multiwalled carbon nanotubes functionalized via the Bingel reaction

2015 ◽  
Vol 83 ◽  
pp. 121-134 ◽  
Author(s):  
Danijela V. Brković ◽  
Milka L. Avramov Ivić ◽  
Vesna M. Rakić ◽  
Luca Valentini ◽  
Petar S. Uskoković ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Morphological Characterization ◽  
Multiwalled Carbon ◽  
Bingel Reaction

Non-Covalent Functionalization of Graphene and Multiwalled Carbon Nanotubes Composites for Transparent Conductive Films

2014 ◽  
Vol 602-603 ◽  
pp. 921-925
Author(s):  
Chun Lin Zhao ◽  
Li Xing ◽  
Jun Hui Xiang ◽  
Hua Zheng Sai ◽  
Zhen You Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Colloidal Suspensions ◽  
Covalent Functionalization ◽  
Multiwalled Carbon ◽  
Vacuum Filtration ◽  
Conductive Films ◽  
Graphene Films ◽  
Transparent Conducting ◽  
Few Layer Graphene

In this paper, dry ice is converted into few-layer graphene, which can be dispersed stably in N, N-Dimethylformamide (DMF) by adding pyrene-1-boronic as a stabilizer that non-covalently functionalizes the surface of graphene to obtain homogeneous colloidal suspensions. Moreover, we make use of vacuum filtration transferring for fabricating transparent conducting graphene films by incorporating multiwalled carbon nanotubes (MWNTs). The increased conductivity is ascribed to the formation of a more efficient network. Here a transmittance of 81% at 550 nm and a sheet resistance as low as 38.17 KΩ/sq are obtained.

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