Evidences for π-interactions between pyridine modified copolymer and carbon nanotubes and its role as a compatibilizer in poly(methyl methacrylate) composites

Cohen, Eyal; Dodiuk, H.; Ophir, Amos; Kenig, S.; Barry, Carol L.; Mead, Joey

doi:10.1016/j.compscitech.2013.02.012

Cited by 20 publications

(12 citation statements)

References 40 publications

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Section: Resultsmentioning

confidence: 99%

“…The addition of the aromatic functionality to the PP backbone caused a more pronounced shift, providing evidence of increased polymer/filler interactions. This is likely attributable to the noncovalent p-p interaction between pyridine groups and nanotube sidewalls [3,27]. Figure 8 shows that addition of 1.7 vol% MWCNTs resulted in an increase in composite conductivity by approximately 13 orders of magnitude.…”

Section: Mwcnt Dispersionmentioning

confidence: 93%

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Noncovalent compatibilization of polypropylene/MWCNT composites using an amino-pyridine grafted polypropylene matrix

2015

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Polypropylene (PP)/multiwalled carbon nanotube (MWCNT) composites are prepared by implementing noncovalent compatibilization. The compatibilization method involves PP matrix functionalization with pyridine (Py) aromatic moieties, which are capable of π–π interaction with MWCNT sidewalls. Imaging revealed that the addition of 25 wt% of PP‐g‐Py to neat PP is capable of drastically reducing nanotube aggregate size and amount, compared to a matrix containing the equivalent amount of a maleated PP (PP‐g‐MA). Raman spectroscopy confirms improved polymer/nanotube interaction with the PP‐g‐Py matrix. The electrical percolation threshold appears at a MWCNT loading of approximately 1.2 wt%, and the maximum value of the electrical conductivity achieved is 10−2 S/m, irrespective of the functionalization procedure. The modulus of the composites is improved with the addition of MWCNTs. Furthermore, composites functionalized with Py display significant improvements in composite ductility compared with their maleated counterparts because of the improved filler dispersion. POLYM. COMPOS., 37:2794–2802, 2016. © 2015 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Section: Mwcnt Dispersionmentioning

confidence: 93%

Noncovalent compatibilization of polypropylene/MWCNT composites using an amino-pyridine grafted polypropylene matrix

2015

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“…Fe 3 O 4 nanoparticles (NPs) have attracted particular interest in separation science because of their extraordinary superparamagnetism, structural, and hyperfine properties. Since the discovery of carbon nanotubes in 1991 by Lijima , it became clear that they might be an excellent absorption material because of their high adsorption capacity and inner volume, stability, mechanical strength, and the possibility of establishing π–π interactions . The introduction of multi‐walled carbon nanotube nanoparticles decorated Fe 3 O 4 nanoparticles (MWCNT@Fe 3 O 4 NPs) will combine the high adsorption capacity of MWCNT with the convenient separation of magnetic Fe 3 O 4 NPs.…”

Section: Introductionmentioning

confidence: 99%

Magnetic solid‐phase extraction for determination of the total malachite green, gentian violet and leucomalachite green, leucogentian violet in aquaculture water by high‐performance liquid chromatography with fluorescence detection

Zhao

Wei

Yang

2016

J of Separation Science

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In this study, magnetic multi-walled carbon nanotube nanoparticles were synthesized and used as the adsorbent for the sums of malachite green, gentian violet and leucomalachite green, leucogentian violet in aquaculture water samples followed by high performance liquid chromatography with fluorescence detection. This method was based on in situ reduction of chromic malachite green, gentian violet to colorless leucomalachite green, leucogentian violet with potassium borohydride, respectively. The obtained adsorbent combines the advantages of carbon nanotubes and Fe3 O4 nanoparticles in one material for separation and preconcentration of the reductive dyes in aqueous media. The structure and properties of the prepared nanoparticles were characterized by transmission and scanning electron microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy. The main parameters affecting the adsorption recoveries were investigated and optimized, including reducing agent concentration, type and amount of sorbent, sample pH, and eluting conditions. Under the optimum conditions, the limits of detection in this method were 0.22 and 0.09 ng/mL for malachite green and gentian violet, respectively. Product recoveries ranged from 87.0 to 92.8% with relative standard deviations from 4.6 to 5.9%. The results indicate that the sorbent is a suitable material for the removal and concentration of triphenylmethane dyes from polluted environmental samples.

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“…For example, Geng et al selected polyoxyethylene octyl phenyl ether as a modifier to attach the surfaces of CNTs by hydrophobic attractions and the achieved mixtures were then mixed with epoxy resin to prepare nanocomposites with enhanced mechanical properties . Cohen et al utilized 4‐aminomethyl pyridine modified poly(methyl methacrylate‐co‐methacrylic acid) to wrap CNTs through π‐π interactions and prepared polymethyl methacrylate (PMMA)/CNTs nanocomposites with improved dispersion and excellent properties by melt mixing . Although there are quite a few examples of preparing CNTs/polymer nanocomposites through non‐covalent interactions in the open literature, it is a remarkable fact that previous preparation techniques involve at least two steps: CNTs are functionalized first and then compounded with original polymer matrix, or polymer matrix are functionalized first and then compounded with original CNTs .…”

Section: Introductionmentioning

confidence: 99%

One‐Step Preparation of Non‐Covalent Functionalized Carboxylic Multi‐Walled Carbon Nanotubes/Polymethyl Methacrylate Nanocomposites Via In Situ Polymerization

Jiang

Wang

et al. 2016

Adv Polym Technol

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In this work, methyl methacrylate (MMA) copolymerized with cationic monomer 2-(methacryloyloxy)ethyltrimethylammonium chloride (MTC) via in situ suspension copolymerization, meanwhile, negatively charged carboxylic multi-walled carbon nanotubes (MWCNTs) were adsorbed through electrostatic interactions during copolymerization process to fabricate nanocomposites. The chemical structure of copolymer was analyzed by 1 H nuclear magnetic resonance ( 1 H-NMR). The interfacial adhesion between MWCNTs and polymer matrix was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The morphologies of synthesized microspheres were observed by SEM. Finally, the mechanical properties of nanocomposites were investigated in detail. The results suggest that: the nanocomposites have been successfully synthesized by in situ suspension copolymerization; both the dispersion of MWCNTs and interfacial adhesion between MWCNTs and matrix were improved; and the mechanical properties of nanocomposites were dramatically reinforced. The nanocomposites were prepared in one step without additional treatments of MWCNTs or copolymer matrix, which makes the method relatively efficient.

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Evidences for π-interactions between pyridine modified copolymer and carbon nanotubes and its role as a compatibilizer in poly(methyl methacrylate) composites

Cited by 20 publications

References 40 publications

Noncovalent compatibilization of polypropylene/MWCNT composites using an amino-pyridine grafted polypropylene matrix

Noncovalent compatibilization of polypropylene/MWCNT composites using an amino-pyridine grafted polypropylene matrix

Magnetic solid‐phase extraction for determination of the total malachite green, gentian violet and leucomalachite green, leucogentian violet in aquaculture water by high‐performance liquid chromatography with fluorescence detection

One‐Step Preparation of Non‐Covalent Functionalized Carboxylic Multi‐Walled Carbon Nanotubes/Polymethyl Methacrylate Nanocomposites Via In Situ Polymerization

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