Rheological and electrical properties of polystyrene nanocomposites via incorporation of polymer-wrapped carbon nanotubes

Park, Jae Sang; An, Ji Hun; Jang, Keon‐Soo; Lee, Seong Jae

doi:10.1007/s13367-019-0012-7

Cited by 6 publications

(4 citation statements)

References 29 publications

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“…In addition, the increase was higher when the GO‐PEOZ‐2 content was increased in DGEBA‐GO‐PEOZ‐2 suggesting that rheological network formation process is still ongoing. On the contrary, in the case of GO‐PEOZ‐4, the increase was lower when the GO‐PEOZ‐4 content increased from 0.5 to 1 wt% demonstrating that the rheological network was already formed by 0.5 wt% addition of GO‐PEOZ‐4 in DGEBA‐GO‐PEOZ‐4 64 . Similarly, at least 1 wt% addition of GO‐PEOZ‐1 is necessary for a potential network formation in DGBEA‐GO‐PEOZ‐1.…”

Section: Resultsmentioning

confidence: 89%

“…On the contrary, in the case of GO-PEOZ-4, the increase was lower when the GO-PEOZ-4 content increased from 0.5 to 1 wt% demonstrating that the rheological network was already formed by 0.5 wt% addition of GO-PEOZ-4 in DGEBA-GO-PEOZ-4. 64 Similarly, at least 1 wt% addition of GO-PEOZ-1 is necessary for a potential network formation in DGBEA-GO-PEOZ-1. Another indicator is the dominancy of the viscoelastic solid-like behavior (G 0 > G 00 ) in the entire shear strain region for the well dispersed fillers, however, the neat GO or poorly dispersed modified GOs (GO-PEOZ-PEI-1, 2, and 4) showed G 00 > G 0 suggesting that viscous liquid-like property is more dominant in poorly dispersed composites.…”

Section: Epoxy Dispersions Of Modified Gosmentioning

confidence: 99%

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Polyoxazoline‐modified graphene oxides with improved water and epoxy resin dispersibility and stability towards composite applications

Şahin

Kohlan

Atespare

et al. 2022

J of Applied Polymer Sci

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Graphene oxide (GO) is modified with poly(2-ethyl-2-oxazoline) (PEOZ) and poly [(2-ethyl-2-oxazoline-co-(ethylenimine)] (PEOZ-PEI) to enhance its dispersibility in water and epoxy resin. PEOZ with a terminal primary amine and POZ-PEI with multiple backbone secondary amines are synthesized with scalable methods and characterized by nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR), and gel permeation chromatography (GPC). GO modifications are performed at room temperature and 90 C with/without N,N 0 -dicyclohexylcarbodiimide (DCC) and modified-GOs are analyzed by FTIR, thermogravimetric analysis (TGA), and scanning electron microscopyenergy-dispersive X-ray spectroscopy (SEM-EDX). It is observed that the polymer incorporation varies based on the reaction condition, polymer type, and functional group type and position. The dispersion quality and stability of modified GOs are studied in water by particle size analyzer and visually and in epoxy resin by rheometer. PEOZ-modified GOs show better dispersibility and stability than PEOZ-PEI-modified GOs in both media since PEOZ is monofunctional, preventing the agglomerate formation and improving polymer exposure to the dispersion media by its longer length and higher water-solubility, whereas PEOZ-PEI has lower water solubility, multiple amines for interactions leading to agglomeration and limited polymer exposure to the dispersion media. The tailorable polymer grafting and the increased dispersibility of modified GOs in both media are promising indicators of their possible applications in composites.

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Section: Resultsmentioning

confidence: 89%

Section: Epoxy Dispersions Of Modified Gosmentioning

confidence: 99%

Polyoxazoline‐modified graphene oxides with improved water and epoxy resin dispersibility and stability towards composite applications

Şahin

Kohlan

Atespare

et al. 2022

J of Applied Polymer Sci

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“…The main problem limiting carbon nanotubes' application is their tendency to form aggregates (bundles), which are very hard to disintegrate. This is caused by the van der Waals forces between the carbon atoms forming carbon nanotubes, combined with the large specific surface area of CNTs, reaching meters per gram [11][12][13]. The authors' solution to the mentioned problem is a developed method facilitating the acquisition of nanocomposites with a good, uniform dispersion, as the formation of a continuous electro-conductive network is needed to manufacture materials used as shields against both static electricity and electromagnetic radiation.…”

Section: Introductionmentioning

confidence: 99%

The Electromagnetic Shielding Properties of Biodegradable Carbon Nanotube–Polymer Composites

Pietrzak,

Stano,

Szymański

2024

Electronics

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In this article, the electromagnetic shielding properties of carbon nanotube–polymer nanocomposites are presented. The composite fabrication technique is spray-drying, the usage of which leads to a uniform dispersion of carbon nanotubes (CNTs) in a polymer matrix. Obtaining good filler dispersion is necessary to form a continuous, electrically conductive network of CNTs inside the polymer matrix. In the described nanocomposites, the network of conductive filler particles acts as an electromagnetic radiation barrier. For this reason, developing a highly effective fabrication method is very important. Also, the method should be simple enough to be easily adopted in an industrial environment. The authors shows in this text that both goals mentioned are achieved. The obtained nanocomposite material not only has electrostatic shielding capabilities but comprises electromagnetic shielding properties, which fulfills the main goal of the presented work. It is also worth mentioning that the developed manufacturing method allows for the usage of different fillers and polymers and thus the fabrication of materials capable of meeting a wide range of requirements.

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“…For preparing polymer nanocomposites incorporated with CNTs, there are a variety of methods, such as melt blending [ 32 ], solution mixing [ 33 ], in situ polymerization [ 34 ], and latex-based process [ 35 , 36 , 37 ]. Among them, the latex-based process is a versatile technology for dispersing nanofillers such as CNTs and metallic nanowires together with colloidal polymer particles in an aqueous medium [ 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

Latex-Based Polystyrene Nanocomposites with Non-Covalently Modified Carbon Nanotubes

et al. 2021

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We prepared electrically conductive polystyrene (PS) nanocomposites by incorporating non-covalently surface-modified carbon nanotubes (CNTs) with hydrophilic polymers such as polydopamine (PDA) and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). Further, ethylene glycol (EG) was introduced as a second dopant to improve the electrical properties of the nanocomposites prepared with PEDOT:PSS-wrapped CNTs. All conductive PS nanocomposites were prepared through latex-based process, and the morphology and properties of the nanocomposites were investigated. The electrical properties of the nanocomposites with PEDOT:PSS-wrapped CNTs were better than those of the nanocomposites with PDA-coated CNTs owing to the conducting nature of PEDOT:PSS, although the dispersions of both types of modified CNTs in the PS matrix were excellent, as evidenced by morphology and rheology. In the case of PEDOT:PSS modification, the electrical properties of the nanocomposites with EG-doped PEDOT:PSS-wrapped CNTs were superior to those of the nanocomposites without EG treatment.

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Rheological and electrical properties of polystyrene nanocomposites via incorporation of polymer-wrapped carbon nanotubes

Cited by 6 publications

References 29 publications

Polyoxazoline‐modified graphene oxides with improved water and epoxy resin dispersibility and stability towards composite applications

Polyoxazoline‐modified graphene oxides with improved water and epoxy resin dispersibility and stability towards composite applications

The Electromagnetic Shielding Properties of Biodegradable Carbon Nanotube–Polymer Composites

Latex-Based Polystyrene Nanocomposites with Non-Covalently Modified Carbon Nanotubes

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