Phase behaviour, microstructure, and percolation of poly(ethylene glycol) filled by multiwalled carbon nanotubes and organophilic montmorillonite

2011 ◽  
Vol 45 (24) ◽  
pp. 2555-2566 ◽  
Author(s):  
N.I. Lebovka ◽  
E.A. Lysenkov ◽  
A.I. Goncharuk ◽  
Yu.P. Gomza ◽  
V.V. Klepko ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Ethylene Glycol ◽  
Percolation Threshold ◽  
Multiwalled Carbon Nanotubes ◽  
Phase Behaviour ◽  
Poly Ethylene Glycol ◽  
Multiwalled Carbon ◽  
Poly Ethylene ◽  
High Level

This work studies phase behavior, microstructure and percolation of the poly(ethylene glycol) (PEG), filled by multiwalled carbon nanotubes (MWCNTs), organo-modified montmorillonite (OMMT), and their mixtures, using differential scanning calorimentry (DSC), X-ray diffraction (XRD), electrical conductivity, and analysis of microscopic images. The DSC and XRD data showed a noticeable decrease of PEG crystallinity with increase of nanofiller content. Filling of PEG by MWCNTs was accompanied by a percolation threshold at ≈0.1 wt%, and the estimated electrical conductivity exponent ( t = 1.77 ± 0.07) was typical for the random percolation networks. The similar threshold behavior, but with higher percolation threshold ≈0.5–1.0 wt%, was observed for PEG filled by OMMT. The observed effect of OMMT-enhanced dispersion of MWCNTS in PEG at a high level of loading by nanoparticles offers good prospects for simultaneous improvement of the electrical and mechanical properties of PEG-based composites.

scholarly journals A new ethanol biosensor based on polyfluorene-g-poly(ethylene glycol) and multiwalled carbon nanotubes

2020 ◽  
Vol 122 ◽  
pp. 109300 ◽  
Author(s):  
Siddika Aybuke Bekmezci ◽  
Saniye Soylemez ◽  
Gorkem Yilmaz ◽  
Yasemin A. Udum ◽  
Yusuf Yagci ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ethylene Glycol ◽  
Multiwalled Carbon Nanotubes ◽  
Poly Ethylene Glycol ◽  
Multiwalled Carbon ◽  
Poly Ethylene

Spectroscopic Evaluation of the Length of Poly(ethylene glycol) Covalently Attached to Multiwalled Carbon Nanotubes

2009 ◽  
Vol 38 (9) ◽  
pp. 890-891 ◽  
Author(s):  
Satoshi Kubota ◽  
Takafumi Maruyama ◽  
Hiromasa Nishikiori ◽  
Nobuaki Tanaka ◽  
Morinobu Endo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ethylene Glycol ◽  
Multiwalled Carbon Nanotubes ◽  
Poly Ethylene Glycol ◽  
Multiwalled Carbon ◽  
Poly Ethylene

scholarly journals UV-Cured Poly(Ethylene Glycol) Diacrylate/Carbon Nanostructure Thin Films. Preparation, Characterization, and Electrical Properties

2020 ◽  
Vol 4 (1) ◽  
pp. 4 ◽  
Author(s):  
Panagiotis Loginos ◽  
Anastasios Patsidis ◽  
Vasilios Georgakilas
Keyword(s):  
Thin Films ◽  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Ethylene Glycol ◽  
Carbon Nanostructures ◽  
Spectroscopic Techniques ◽  
Poly Ethylene Glycol ◽  
Carbon Nanostructure ◽  
Glycol Diacrylate ◽  
Poly Ethylene

Carbon nanoallotropes such as carbon nanotubes, graphene, and their derivatives have been combined with a plethora of polymers in the last years to develop new composite materials with interesting properties and applications. However, the area of photopolymer composites with carbon nanostructures has not been analogously explored. In the present article, we study the photopolymerization of poly(ethylene glycol)diacrylate (PEGDA) enriched with different carbon nanoallotropes like graphene, pristine and chemically modified carbon nanotubes (CNTs and fCNTs), and a hybrid of graphene and CNTs. The products were characterized by several microscopic and spectroscopic techniques and the electrical conductivity was studied as a function of the concentrations of carbon nanoallotropes. In general, stable thin films were produced with a concentration of carbon nanostructures up to 8.5%, although the addition of carbon nanostructures in PEGDA decreases the degree of photopolymerization, and PEDGA/carbon nanostructure composites showed electrical conductivity at a relatively low percentage.

Antistatic Poly(Ethylene Terephthalate)/Polyaniline-Coating Multiwalled Carbon Nanotubes Nanocomposites

2012 ◽  
Vol 549 ◽  
pp. 553-557 ◽  
Author(s):  
Ruo Xi Wang ◽  
Hua Wang ◽  
Kang Zheng ◽  
Xing You Tian
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Multiwalled Carbon Nanotubes ◽  
Ethylene Terephthalate ◽  
In Situ Polymerization ◽  
Miniemulsion Polymerization ◽  
Multiwalled Carbon ◽  
Positive Effects ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

A convenient method had been developed for preparing antistatic Poly(ethylene terephthalate)/multiwalled carbon nanotubes (PET/MWCNTs) nanocomposites. Polyaniline (PANI) was employed to coat MWCNTs as interfacial modifier. At first, the PANI-coating MWCNTs (PANI-c-MWCNTs) were prepared via miniemulsion polymerization of aniline at the presence of MWCNTs. The TEM images, FT-IR spectra, UV-Vis spectra and electrical conductivity were investigated, which indicated that the MWCNTs were coated with a conductive PANI ultrathin film while the morphology and electrical property had almost no damage. Then the PANI-c-MWCNTs were added into PET through in-situ polymerization method. The TEM images indicate that PANI-c-MWCNTs could be well dispersed in PET matrix, which had important positive effects on the electrical conductive properties of PET/PANI-c-MWCNTs nanocomposites. The results indicate that the electrical conductivity of PET/1.0 wt% PANI-c-MWCNTs nanocomposites reaches the antistatic level.

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