Tailoring the characteristics of graphite oxide nanosheets for the production of high-performance poly(vinyl alcohol) composites

Wang, Yan; Shi, Zhuqun; Yu, Junrong; Chen, Lei; Zhu, Jing; Hu, Zuming

doi:10.1016/j.carbon.2012.07.042

Cited by 38 publications

(30 citation statements)

References 55 publications

(70 reference statements)

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“…Over-oxidized GO, though more dispersible in aqueous media, requires harsher reduction conditions to restore the graphene basal aromatic structure and thus conductivity. 47,48 However, Tour et al 49 have shown that replacing sodium nitrate by phosphoric acid and increasing the amount of KMnO 4 in a modified Hummers oxidation of graphite affords a more oxidized and hydrophilic GO with no toxic gas production or large exotherm. The resulting CCG obtained from the hydrazine reduction of the GO is comparable in quality and conductivity with that of CCG from a typical Hummers produced GO, making this an attractive approach for large-scale graphene production.…”

Section: Graphitementioning

confidence: 99%

“…9,50 The extent of oxidation and choice of exfoliation procedures used are critical for controlling the efficiency of exfoliation, lateral sheet size as well as the number of GO layers (Table 2). 47,48,[51][52][53][54][55] As the oxygen content increases in the starting graphite oxide, the efficiency of exfoliation also increases. 47 For example, in their study of the capillary zone electrophoresis of GO, Mueller et al 53 exfoliated graphite oxide using high dilution at different intervals of ultrasonication over 15 h. As observed in the atomic force microscopy images of the resulting GO, the lateral size reduced over that time from the initial 10 μm to 100 nm.…”

Section: Exfoliation Of Graphite Oxidementioning

confidence: 99%

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Chemically converted graphene: scalable chemistries to enable processing and fabrication

et al. 2015

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Graphene, a nanocarbon with exceptional physical and electronic properties, has the potential to be utilized in a myriad of applications and devices. However, this will only be achieved if scalable, processable forms of graphene are developed along with ways to fabricate these forms into material structures and devices. In this review, we provide a comprehensive overview of the chemistries suitable for the development of aqueous and organic solvent graphene dispersions and their use for the preparation of a variety of polymer composites, materials useful for the fabrication of graphene-containing structures and devices. Fabrication of the processable graphene dispersions or composites by printing (inkjet and extrusion) or spinning methods (wet) is reviewed. The preparation and fabrication of liquid crystalline graphene oxide dispersions whose unique rheologies allow the creation of graphene-containing structures by a wide range of industrially scalable fabrication techniques such as spinning (wet and dry), printing (ink-jet and extrusion) and coating (spray and electrospray) is also reviewed.

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Section: Graphitementioning

confidence: 99%

Section: Exfoliation Of Graphite Oxidementioning

confidence: 99%

Chemically converted graphene: scalable chemistries to enable processing and fabrication

et al. 2015

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“…For example, GO is readily dispersible in water, and several organic solvents and polymers. 8 Moreover, functional group attached on the GO surface can make strong interactions with polymer matrix. In addition, bulk quantities of GO can be easily produced by chemically oxidising graphite.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that the less oxidized GO was more effective than fully oxidized GO in reinforcing PVA. 8 The less oxidized GO could possess higher intrinsic mechanical properties with fewer defects which could be the reason for better enhancement of mechanical performance of PVA nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Preparation of graphene oxide/epoxy nanocomposites with significantly improved mechanical properties

Galpaya¹,

Wang²,

George³

et al. 2014

Journal of Applied Physics

161

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Articles you may be interested inEnhanced ferroelectric and pyroelectric properties of poly(vinylidene fluoride) with addition of graphene oxides Structural and optoelectronic properties of P3HT-graphene composites prepared by in situ oxidative polymerization J. Appl. Phys. 112, 054327 (2012); 10.1063/1.4751271 Effect of incorporation of carbon nanotubes on the mechanical properties of epoxy-amine composites AIP Conf. Proc. 1459, 226 (2012); 10.1063/1.4738451 Effect of clay induced morphological transitions on behaviour of epoxy/PCL nanocomposite AIP Conf. Proc. 1459, 80 (2012); 10.1063/1.4738404High thermal conductivity epoxy-silver composites based on self-constructed nanostructured metallic networksThe effect of graphene oxide (GO) on the mechanical properties and the curing reaction of Diglycidyl Ether of Bisphenol A/F and Triethylenetetramine epoxy system was investigated. GO was prepared by oxidation of graphite flakes and characterized by spectroscopic and microscopic techniques. Epoxy nanocomposites were fabricated with different GO loading by solution mixing technique. It was found that incorporation of small amount of GO into the epoxy matrix significantly enhanced the mechanical properties of the epoxy. In particular, model I fracture toughness was increased by nearly 50% with the addition of 0.1 wt. % GO to epoxy. The toughening mechanism was understood by fractography analysis of the tested samples. The more irregular, coarse, and multi-plane fracture surfaces of the epoxy/GO nanocomposites were observed. This implies that the two-dimensional GO sheets effectively disturbed and deflected the crack propagation. At 0.5 wt. % GO, elastic modulus was $35% greater than neat epoxy. Differential scanning calorimetry (DSC) results showed that GO addition moderately affect the glass transition temperature (T g ) of epoxy. The maximum decrease of T g by $7 C was shown for the nanocomposite with 0.5 wt. % GO. DSC results further revealed that GO significantly hindered the cure reaction in the epoxy system. V C 2014 AIP Publishing LLC.

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“…One study reported that the less oxidized GO was more effective than nearly fully oxidized GO in terms of reinforcing polymers. The better reinforcement effect was attributed to the higher quality of GO with much fewer structural defects [11]. Zhang et al found that polarity matching is crucial in improving the interaction between fillers and matrix and the dispersion of fillers.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Mechanical and Thermal Behaviour of Graphene Oxide/Epoxy Nanocomposites

GALPAYA¹,

WANG²,

Chen³

et al. 2013

JMC

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Tailoring the characteristics of graphite oxide nanosheets for the production of high-performance poly(vinyl alcohol) composites

Cited by 38 publications

References 55 publications

Chemically converted graphene: scalable chemistries to enable processing and fabrication

Chemically converted graphene: scalable chemistries to enable processing and fabrication

Preparation of graphene oxide/epoxy nanocomposites with significantly improved mechanical properties

Fabrication and Mechanical and Thermal Behaviour of Graphene Oxide/Epoxy Nanocomposites

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