Synthesis of Phase Transferable Graphene Sheets Using Ionic Liquid Polymers

Kim, Tae Young; Lee, Hyun‐Wook; Kim, Jong‐Eun; Suh, Kwang S.

doi:10.1021/nn901525e

Cited by 231 publications

(156 citation statements)

References 29 publications

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“…We have previously shown that PILs, specifi cally poly(1-vinyl-3-ethylimidazolium) bromide, are easily physisorbed onto the RG-O surface via electrostatic interaction or cation-π interaction, and they stabilize RG-O sheets in the aqueous dispersion. [ 14 ] While the oxygen-rich functional groups on G-O are generally negatively charged, [ 5 ] RG-O sheets modifi ed with PIL molecules were found to have positively charged surfaces, as evident from surface charge measurements (see Supporting Information). In this study, we also found that the use of these PIL-modifi ed RG-O materials (here referred to as PIL:RG-O) is crucial to ensure the formation of self-organized RG-O micropatterns on the negatively charged and hydrophilic substrates.…”

Section: Doi: 101002/adma201100329mentioning

confidence: 99%

Self‐Organized Graphene Patterns

et al. 2011

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Section: Doi: 101002/adma201100329mentioning

confidence: 99%

Self‐Organized Graphene Patterns

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“…[18] The introduction of imidazolium cations to the periphery of the dendritic structures should also result in phase-transferable DILs. The phase-transfer process of DILs was achieved through sequential anion exchanges (generation two as a representative example is shown in Scheme 3).…”

Section: Resultsmentioning

confidence: 99%

Dendritic Ionic Liquids Based on Imidazolium‐Modified Poly(aryl ether) Dendrimers

Qin

Chen

et al. 2014

Chemistry An Asian Journal

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A series of dendritic ionic liquids (DILs) based on imidazolium-modified poly(aryl ether) dendrimers IL-Br-Gn (n=0-3) were synthesized by a modified convergent approach and "click" chemistry. The resulting DILs exhibited high thermal resistance with decomposition temperatures up to 270 °C and low glass transition temperatures in the range of approximately -5-0 °C. All IL-Br-Gn were found to be miscible with water at any ratio and could encapsulate hydrophobic molecules. The reversible phase transfer of the DILs between the aqueous and organic phases was accomplished by simple anion exchange between the hydrophilic Br(-) anion and the hydrophobic bis(trifluoromethylsulfonyl)amide anion (NTf2(-)). IL-Br-Gn could be used as transporters to shuttle hydrophobic molecules between the organic and aqueous phases efficiently. The present work provides a new kind of transporting materials with potential applications in substance separation, drug delivery, and biomolecule transport.

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“…Similarly, poly(VeimBr)-modified graphene sheets were obtained by chemical reduction of GO with hydrazine monohydrate in the presence of poly(VeimBr) [162]. They are finely dispersed for 6 months without any agglomeration in an aqueous solution, and can be readily transferred into an organic phase (e.g., propylene carbonate, DMF and NMP) by ion-exchange with hydrophobic anions such as Tf 2 N. This shows a tunable solubilizing characteristic of graphene in the aqueous and organic phases.…”

Section: With Graphenementioning

confidence: 99%

Progress in Imidazolium Ionic Liquids Assisted Fabrication of Carbon Nanotube and Graphene Polymer Composites

et al. 2013

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Carbon nanotubes (CNTs) and graphene sheets are the most promising fillers for polymer nanocomposites due to their superior mechanical, electrical, thermal optical and gas barrier properties, as well as high flame-retardant efficiency. The critical challenge, however, is how to uniformly disperse them into the polymer matrix to achieve a strong interface for good load transfer between the two. This problem is not new but more acute in CNTs and graphene, both because they are intrinsically insoluble and tend to aggregate into bundles and because their surfaces are atomically smooth. Over the past decade, imidazolium ionic liquids (Imi-ILs) have played a multifunctional role (e.g., as solvents, dispersants, stabilizers, compatibilizers, modifiers and additives) in the fabrication of polymer composites containing CNTs or graphene. In this review, we first summarize the liquid-phase exfoliation, stabilization, dispersion of CNTs and graphene in Imi-ILs, as well as the chemical and/or thermal reduction of graphene oxide to graphene with the aid of Imi-ILs. We then present a full survey of the literature on the Imi-ILs assisted fabrication of CNTs and graphene-based nanocomposites with a variety of polymers, including fluoropolymers, hydrocarbon polymers, polyacrylates, cellulose and polymeric ionic liquids. Finally, we give a future outlook in hopes of facilitating progress in this emerging area. OPEN ACCESSPolymers 2013, 5 848

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Synthesis of Phase Transferable Graphene Sheets Using Ionic Liquid Polymers

Cited by 231 publications

References 29 publications

Self‐Organized Graphene Patterns

Self‐Organized Graphene Patterns

Dendritic Ionic Liquids Based on Imidazolium‐Modified Poly(aryl ether) Dendrimers

Progress in Imidazolium Ionic Liquids Assisted Fabrication of Carbon Nanotube and Graphene Polymer Composites

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