Compatibilizing effect of graphite oxide in graphene/PMMA nanocomposites

Jang, Jae-Won; Jeong, Han Mo; Kim, Byung Kyu

doi:10.1007/bf03218920

Cited by 25 publications

(18 citation statements)

References 20 publications

(22 reference statements)

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“…Table III shows that the conductivity is improved dramatically by the addition of FGS, with an approximate 10 7 -fold increase by 3 wt% FGS. This result is similar with the previous results by our group [14][15][16]47 or other research groups 18,20,46 about the conductivity of FGS/polymer nanocomposites, and this indicates that FGS effectively makes a conducting channel in the PEMA matrix, as observed in the TEM image. However, no distinct difference in conductivity was observed between the samples prepared by the physical mixing method and in situ method.…”

Section: Resultssupporting

confidence: 94%

“…Thus, FGS, which is compatible with the matrix polymer and which has a large surface area in addition to various unusual properties, has been emerging as a promising nanofiller in the preparation of nanocomposites of novel performances. [14][15][16][17][18][19][20] The interaction between the matrix polymer and nanofiller can be improved by covalent or noncovalent modifications. The noncovalent modification can be achieved by the introduction of functional groups onto the nanofiller surface or by the introduction of a third component, such as a surfactant.…”

Section: Introductionmentioning

confidence: 99%

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The properties of functionalized graphene sheet/poly(ethyl methacrylate) nanocomposites: The effects of preparation method

Lee

Jeong

et al. 2011

Macromol. Res.

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Poly(ethyl methacrylate) (PEMA) nanocomposites reinforced with a functionalized graphene sheet (FGS) were prepared by two different methods; a physical mixing method and an in situ method. The results from thermogravimetric analysis and Fourier transform infrared spectroscopy suggested the possibility that PEMA molecules could be grafted on FGS, when ethyl methacrylate (EMA) was polymerized in the presence of FGS by an in situ method with a radical initiator, 2,2'-azobisisobutyronitrile. The enhanced interaction between FGS and matrix PEMA observed from tensile storage modulus and rheological properties also demonstrated the possibility of the graft reaction. However, the differences in morphology and conductivity between the nanocomposites prepared by different preparation methods were marginal. That is, in both nanocomposites prepared by two different methods, FGS dispersed finely in the PEMA matrix to effectively make a conductive channel; 3 wt% FGS improved the conductivity by approximately 10 7 -fold compared to that of pristine PEMA.

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Section: Resultssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

The properties of functionalized graphene sheet/poly(ethyl methacrylate) nanocomposites: The effects of preparation method

Lee

Jeong

et al. 2011

Macromol. Res.

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“…Therefore, GO can be used as a novel adsorbent, 4,5 and as an efficient nanofiller to reinforce polymer matrices or to endow functionality such as electric conductivity. [6][7][8][9] GO can also be utilized as an effective fire retardant material by a chemical mechanism due to its intumescent effects and a physical mechanism due to its layered structure, which synergistically inhibit combustion. [10][11][12][13] That is, GO can act as both a carbonization compound and a blowing agent.…”

Section: Introductionmentioning

confidence: 99%

Graphite oxides as effective fire retardants of epoxy resin

et al. 2011

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Graphite oxides (GOs) at various oxidation states were examined as fire retardants of epoxy resin. Excessive oxidation is detrimental to the fire retardant effect of GO because it generated a weak GO with reduced intumescent ability. GO manifested optimum fire retardant properties when it was properly oxidized due to the effective intumescence, demonstrating that intumescent GO needs to be strong enough to effectively push the epoxy resin matrix apart to cause efficient intumescence and generate a solid remnant char that acts as an efficient barrier. The fire retardant effect of GO was also reduced when a dispersion of GO in the epoxy resin was enhanced by sonication. This shows that the fine dispersion and disordering of layered structure of GO by the intercalation of epoxy molecules into the gallery of GO also reduced the intumescent ability, and the fire retardant effects of GO.

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“…In addition, incorporation of a small amount of graphene into polymer matrix offers a great opportunity to make tough and lightweight materials as long as graphenes are homogeneously distributed in polymer matrices. There have been numerous reports on preparation of polymer/graphene nanocomposites with different kinds of polymer materials, including polystyrene (PS) [33], polycarbonate (PC) [34], PMMA [35][36][37], and PU. [38,39] Fig.…”

Section: Pmma/graphene Nanocompositesmentioning

confidence: 99%

“…Secondly, compatibilizing effect of GO in PMMA/FGS nanocomposites has been investigated. [37] While we have prepared and examined FGS nanocomposites with various polymers, it was found that the dispersability of FGS in a polymer matrix can be improved when GO was used as a compatibilizer. The compatibilizing effect of GO is originated from its chemical resemblance to FGS as well as polar functional groups that can interact with matrix PMMA.…”

Section: Pmma/graphene Nanocompositesmentioning

confidence: 99%