Improvement of mechanical properties of graphene oxide/poly(allylamine) composites by chemical crosslinking

Satti, Amro; Larpent, Patrick; Gun’ko, Yurii K.

doi:10.1016/j.carbon.2010.05.030

Cited by 130 publications

(77 citation statements)

References 31 publications

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“…Therefore, to fully utilize all possible functions of GO fi lms and its composites, effective cross-linking of GO is highly demanded. The fi rst cross-linking recipe introduced was with poly(allylamine) (PAA) [ 126 ] in 2009, in which Park et al [ 126 ] and later on Satti et al [ 143 ] produced composite GO/PAA papers with enhanced tensile strength up to 146 MPa.…”

Section: Cross-linkingmentioning

confidence: 99%

The Chemistry of Graphene Oxide

2015

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In this chapter, we discuss a variety of chemical reactions introduced for GO. Among all studies on the chemistry of GO, the largest portion focused on the reduction of GO back to graphene, mainly due to its high relevance to graphene and the gold rush of graphene research over the last decade. However, doping, functionalization and cross-linking of GO are equally, if not more, interesting to chemists, since GO is a giant model compound of polycyclic aromatic hydrocarbon (PAH) oxides. Here, we start with a thorough comparison between various reducing recipes for GO, and follow with some theoretical simulations and predictions on its convertibility toward graphene. In addition to that, we elaborate on extended chemical modifi cations (covalent and non-covalent), cross-linking, and doping recipes for this macromolecule shown in literature. After all, we intend to show you that GO became a relatively hot research topic, not only due to its relevance to graphene, but also for its high chemical activity and tunability, which enabled the prosperity of its research in various fi elds led by chemists, materials scientists, biologists, physicists, as well as engineers. It is a perfect paradigm for young researchers as an important subject thrived in interdisciplinary research. After all, when real-life problems come, potential solutions do not impose boundaries between disciplines. All relevant disciplines can offer their input, and contribute together to the fi nal solutions, in which cases communications and collaborations between different researchers need to be encouraged and appreciated.

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Section: Cross-linkingmentioning

confidence: 99%

The Chemistry of Graphene Oxide

2015

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“…Moreover, the nanosheets may serve as connecting bridges to prevent the matrix from fracturing upon mechanical deformation, thus enhancing the mechanical properties of epoxy. Another reason may be that, during the casting process, the nanosheets are inclined to lay flat and oriented along the flow of epoxy resin direction, which is beneficial for the efficient stress transfer and thus reinforcing the mechanical properties of composites [48,49]. Table 2 summarizes the mechanical properties data.…”

Section: Mechanical Properties Of Nanocompositesmentioning

confidence: 99%

Enhanced thermal and mechanical properties of epoxy composites by mixing thermotropic liquid crystalline epoxy grafted graphene oxide

Qi¹,

Lu²,

Xiao³

et al. 2014

Express Polym. Lett.

109

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Abstract. Graphene oxide (GO) sheets were chemically grafted with thermotropic liquid crystalline epoxy (TLCP). Then we fabricated composites using TLCP-g-GO as reinforcing filler. The mechanical properties and thermal properties of composites were systematically investigated. It is found that the thermal and mechanical properties of the composites are enhanced effectively by the addition of fillers. For instance, the composites containing 1.0 wt% of TLCP-g-GO present impact strength of 51.43 kJ/m 2 , the tensile strength of composites increase from 55.43 to 80.85 MPa, the flexural modulus of the composites increase by more than 48%. Furthermore, the incorporation of fillers is effective to improve the glass transition temperature and thermal stability of the composites. Therefore, the presence of the TLCP-g-GO in the epoxy matrix could make epoxy not only stronger but also tougher.

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“…But there is experimental evidence pointing out that the chemical linkage of the graphene to the polymer matrix enhances the properties of the composite material. The work of Satti et al [ 62 ] on GO/poly(allylamine) is a good example. Here, GO platelets were covalently bonded to the polymer matrix (amide formation between graphene carboxylic groups and polymer matrix amino groups), and theYoung's modulus and the tensile strength increased ca.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Interphases in Graphene Polymer‐based Nanocomposites: Achievements and Challenges

et al. 2011

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Graphene constitutes a two dimensional sp2 hybridized carbon material with outstanding electrical and mechanical properties. To date, novel methods for producing large quantities of graphene and its derivatives (doped or functionalized graphenes, nanoribbons and nanoplatelets) are emerging, and research dedicated to the fabrication of polymer nanocomposites using graphenes has started. In this Research News, we summarize the synthesis and properties of graphene and its derivatives, and provide an overview of the latest research dedicated to the fabrication of polymer composites for different applications, including mechanical, electrical, optical and thermal. Some of the recently fabricated composites exhibit outstanding properties, however, it is vital to understand the chemistry and physics of the interphases established between the polymer and the graphene surfaces. The challenges in the fabrication of super robust and highly conducting composites using graphenes are also discussed. It is believed that graphene‐based polymer composites will result in commercial products if their interphases and reactivity are carefully controlled.

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Improvement of mechanical properties of graphene oxide/poly(allylamine) composites by chemical crosslinking

Cited by 130 publications

References 31 publications

The Chemistry of Graphene Oxide

The Chemistry of Graphene Oxide

Enhanced thermal and mechanical properties of epoxy composites by mixing thermotropic liquid crystalline epoxy grafted graphene oxide

Interphases in Graphene Polymer‐based Nanocomposites: Achievements and Challenges

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