Exfoliation and Noncovalent Functionalization of Graphene Surface with Poly-N-Vinyl-2-Pyrrolidone by In Situ Polymerization

Perumal, Suguna; Atchudan, Raji; Edison, Thomas Nesakumar Jebakumar Immanuel; Shim, Jae‐Jin; Lee, Yong Rok

doi:10.3390/molecules26061534

Cited by 15 publications

(12 citation statements)

References 70 publications

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Section: Stable Graphene Dispersions Using Polymersmentioning

confidence: 99%

“…( a – f ) images reproduced from ref. [ 121 ]. AFM topographic images and corresponding height profiles of graphene–polyvinyl pyridine (11 k and 27 k): ( g – i ) ethanolic graphene dispersions and ( j – l ) aqueous graphene dispersions.…”

Section: Figurementioning

confidence: 99%

“…Raman spectra of graphite powder and graphene–poly(Vinyl pyrrolidone) composite ( m ), reproduced from ref. [ 121 ]. XRD patterns of graphite (HOPG) and graphene–poly(Vinyl pyrrolidone) composites ( n ), reproduced with permission from ref.…”

Section: Figurementioning

confidence: 99%

“…DCM was found to be a good solvent to disperse graphene using PVK-b-PVP polymer [120]. Graphite was partially exfoliated and dispersed in water by in situ polymerization on the graphene surface [121]. PVPyr with a molecular weight of 10,000 g/mol was used to disperse expanded graphite in different solvents DMF, DMSO, NMP, water, EtOH, and MeOH [122].…”

Section: Stable Graphene Dispersions Using Polymersmentioning

confidence: 99%

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Recent Studies on Dispersion of Graphene–Polymer Composites

2021

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Graphene is an excellent 2D material that has extraordinary properties such as high surface area, electron mobility, conductivity, and high light transmission. Polymer composites are used in many applications in place of polymers. In recent years, the development of stable graphene dispersions with high graphene concentrations has attracted great attention due to their applications in energy, bio-fields, and so forth. Thus, this review essentially discusses the preparation of stable graphene–polymer composites/dispersions. Discussion on existing methods of preparing graphene is included with their merits and demerits. Among existing methods, mechanical exfoliation is widely used for the preparation of stable graphene dispersion, the theoretical background of this method is discussed briefly. Solvents, surfactants, and polymers that are used for dispersing graphene and the factors to be considered while preparing stable graphene dispersions are discussed in detail. Further, the direct applications of stable graphene dispersions are discussed briefly. Finally, a summary and prospects for the development of stable graphene dispersions are proposed.

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Section: Stable Graphene Dispersions Using Polymersmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Stable Graphene Dispersions Using Polymersmentioning

confidence: 99%

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Recent Studies on Dispersion of Graphene–Polymer Composites

2021

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“…Block copolymers have shown better performance in this regard. Recently, Perumal et al produced stable dispersions of graphene in ethanol, isopropanol, and methanol by employing polypyridine-, polystyrene-, and poly-N-vinyl-2-pyrrolidone-based block copolymers [17][18][19][20]. Qamar et al reported a non-ionic block copolymer (Lugalvan BNO12) for dispersing graphene in aqueous solutions [21].…”

Section: Introductionmentioning

confidence: 99%

Disposable Voltammetric Sensor Modified with Block Copolymer-Dispersed Graphene for Simultaneous Determination of Dopamine and Ascorbic Acid in Ex Vivo Mouse Brain Tissue

et al. 2021

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Dopamine (DA) and ascorbic acid (AA) are two important biomarkers with similar oxidation potentials. To facilitate their simultaneous electrochemical detection, a new voltammetric sensor was developed by modifying a screen-printed carbon electrode (SPCE) with a newly synthesized block copolymer (poly(DMAEMA-b-styrene), PDbS) as a dispersant for reduced graphene oxide (rGO). The prepared PDbS–rGO and the modified SPCE were characterized using a range of physical and electrochemical techniques including Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, cyclic voltammetry, electrochemical impedance spectroscopy, and linear sweep voltammetry. Compared to the bare SPCE, the PDbS–rGO-modified SPCE (PDbS–rGO/SPCE) showed better sensitivity and peak-to-peak separation for DA and AA in mixed solutions. Under the optimum conditions, the dynamic linear ranges for DA and AA were 0.1–300 and 10–1100 µM, and the detection limits were 0.134 and 0.88 µM (S/N = 3), respectively. Furthermore, PDbS–rGO/SPCE exhibited considerably enhanced anti-interference capability, high reproducibility, and storage stability for four weeks. The practical potential of the PDbS–rGO/SPCE sensor for measuring DA and AA was demonstrated using ex vivo brain tissues from a Parkinson’s disease mouse model and the control.

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Water‐Based Polyurethane Heating Film with Double‐Layer Conductive Network for a Rapid Electrothermal Response

Shen,

Xiang,

Kuzhandaivel

et al. 2024

Adv Eng Mater

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Carbon‐based composite materials have garnered widespread attention in the field of Personal Thermal Management (PTM). In these applications, constructing conductive fillers with a highly cross‐linked network is key to achieving the rapid electrothermal conversion of materials. Herein, a novel carbon‐based composite material was successfully developed using screen printing technology, with a waterborne polyurethane (WPU) matrix embedded with carbon nanotubes (CNTs) and calcein‐modified graphene nanosheets (CAG). Due to the strong π‐π conjugation interactions present in the highly cross‐linked carbon‐based network, the resulting CAG‐CNTs/WPU composite forms a three‐dimensional conductive network, which not only demonstrates a significant synergistic effect but also facilitates efficient transport of electrons and phonons. Experimental results show that the CAG‐CNTs/WPU composite possesses excellent electrothermal conversion properties and an upper high thermal conductivity (3.10 W·m‐1·K‐1). At a low voltage of 5 V, the composite exhibited a rapid response, increasing to 50 °C in 20 s. This research not only highlights the importance of adopting environmentally friendly preparation methods but also emphasizes the synergistic role played by two‐dimensional graphene nanosheets and one‐dimensional carbon nanotubes in building an efficient three‐dimensional electrothermal network, which has significant scientific and application value in advancing PTM applications.This article is protected by copyright. All rights reserved.

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Exfoliation and Noncovalent Functionalization of Graphene Surface with Poly-N-Vinyl-2-Pyrrolidone by In Situ Polymerization

Cited by 15 publications

References 70 publications

Recent Studies on Dispersion of Graphene–Polymer Composites

Recent Studies on Dispersion of Graphene–Polymer Composites

Disposable Voltammetric Sensor Modified with Block Copolymer-Dispersed Graphene for Simultaneous Determination of Dopamine and Ascorbic Acid in Ex Vivo Mouse Brain Tissue

Water‐Based Polyurethane Heating Film with Double‐Layer Conductive Network for a Rapid Electrothermal Response

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