Effect of molecular chain length on the properties of amine-functionalized graphene oxide nanosheets/epoxy resins nanocomposites

Liu, Fengdan; Wu, Ling; Song, Yanjie; Xia, Wen; Guo, Kun

doi:10.1039/c5ra02013a

Cited by 77 publications

(44 citation statements)

References 37 publications

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“…All of these results directly confirmed the formation of a covalent crosslinking between FGO and APTES‐bisDOPO. Meanwhile, the XPS P 2p, Si 2p, and N 1s spectra of FGO shown in Figure (d–f) also proved the conclusion …”

Section: Resultssupporting

confidence: 53%

Synthesis of modified graphene oxide and its improvement on flame retardancy of epoxy resin

et al. 2019

J of Applied Polymer Sci

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In this work, the small molecule with double-phosphaphenanthrene structure was successfully grafted on the surface of graphene oxide (GO), which is called functionalized graphene oxide (FGO). The introduction of FGO improved the poor interfacial compatibility between graphene and epoxy matrix. And FGO could be used as the highly effective flame retardant. The thermogravimetric analysis results showed a significant improvement in the char yield of cured FGO/EP. When the content of FGO was 3 wt %, the limiting oxygen index value reached 30.4%. At the same time, the three-point bending and thermomechanical tests confirmed that the mechanical properties of the epoxy resin composites were improved. Based on the char analyses of SEM images and Raman spectroscopy, the flame retardant could promote the formation of a stable carbon layer.

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Section: Resultssupporting

confidence: 53%

Synthesis of modified graphene oxide and its improvement on flame retardancy of epoxy resin

et al. 2019

J of Applied Polymer Sci

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“…The graphene oxide (GO), the precursor of GNS, has abundant functional groups on the surface including hydroxyls, epoxides, and carboxyls, which provide the reactive site for covalent functionalization. Moreover, the covalent functionalization significantly alters the Van der Waals interactions among the nanofiller aggregates, making them easy to be dispersed in the polymer matrix [24,25].…”

Section: Introductionmentioning

confidence: 99%

Amine-graphene oxide/waterborne polyurethane nanocomposites: effects of different amine modifiers on physical properties

Jiang

Bian

et al. 2016

J Mater Sci

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To study the dispersity of different amine-graphene oxide (amine-GO) in polymer matrix and the interfacial interactions between functionalized graphene oxide and matrix, two kinds of modifiers-organoamine-and aminosilane-coupling agents-were used to functionalize graphene nanosheets to obtain functionalized graphene oxide/waterborne polyurethane nanocomposites by in situ polymerization. The chemical structure, morphology, and interlayer space of amine-GO nanoplatelets were confirmed by FT-IR, Raman, TGA, XPS, TEM, AFM, and XRD. The dispersity behaviors between different amineGOs and polymers were evaluated by FESEM. The thermal, mechanical, and hydrophobic properties of the nanocomposites were investigated by TGA, tensile testing machine, and water contact angle test, respectively. It was found that the tensile strength of nanocomposites was increased from 10.13 to 27.79 and 28.96 Mpa after the addition of amine-GO functionalized by APTMS and APTES, respectively. The better thermal stability and hydrophobicity of nanocomposites were also achieved by the addition of amine-GO, especially those modified by aminosilane-coupling agents. This study paves a new route for designing and developing chemically converted graphene oxide nanosheets/polymer nanocomposite materials by altering suitable amine-modifier to functionalize graphene oxide nanosheets and then optimizing the interphases between graphene oxide nanosheets and polymer matrices.

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“…Perhaps the oxygen groups on the surface of GO and AFG are decomposed below 100 °C. The oxygen groups of GO were reduced after the amine groups were introduced, resulting in a decomposition of 5.38 and 2.81%, respectively, for GO and AFG below 100 °C . The decomposition of hydroxyl and epoxide groups was confirmed at around 200 °C, and the thermal decomposition of C&dbond;O of carboxyl groups can be observed at around 183 °C.…”

Section: Resultsmentioning

confidence: 99%

“…The TGA curves show a successful modification of the GO surface. Perhaps the oxygen groups on the surface of GO and AFG are decomposed below 100 ∘ C. The oxygen groups of GO were reduced after the amine groups were introduced, resulting in a decomposition of 5.38 and 2.81%, respectively, for GO and AFG below 100 ∘ C. 32 The decomposition of hydroxyl and epoxide groups was confirmed at around wileyonlinelibrary.com/journal/pi 200 ∘ C, and the thermal decomposition of C&dbond;O of carboxyl groups can be observed at around 183 ∘ C. After modification, a thermal decomposition was observed at around 190 ∘ C, indicating that the carboxyl groups located on the surface of GO were successfully modified with amino groups.…”

Section: Preparation Of Afgmentioning

confidence: 99%

Effects of crosslinking agents on the physical properties of polyimide/amino‐functionalized graphene oxide hybrid films

Jeong

Yoo

Lee

et al. 2018

Polymer International

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The effects of crosslinking agents (crosslinkers) on polyimide (PI)/graphene oxide (GO) hybrid films were extensively investigated. The surface of GO was modified with amino groups using 4‐aminobenzylamine to improve compatibility with pyromellitic dianhydride/4,4′‐oxydianiline PI, and two kinds of crosslinkers were used: tris(4‐aminophenyl)amine and 1,3,5‐triazine‐2,4,6‐triamine (melamine). The mechanical, thermal and optical properties of the PI hybrid films were investigated. In particular, the transparency and physical properties of the PI hybrid films containing amino‐functionalized GO with homogeneous dispersion were improved. As the content of the crosslinker increased, a crosslinking network was formed between the PI chains, and the stiffness of the hybrid films was increased. The glass transition temperature, heat resistance and mechanical properties were also enhanced. The PI hybrids prepared with a rigid crosslinker exhibited higher optical transparency due to the reduction of the intermolecular charge transfer interactions with increasing interchain spacing between the PI chains. © 2018 Society of Chemical Industry

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Effect of molecular chain length on the properties of amine-functionalized graphene oxide nanosheets/epoxy resins nanocomposites

Abstract: Amine-functionalized graphene oxide nanosheets were prepared by linear poly(oxyalkylene)amines with two different molecular weights, 400 and 2000 (D400 and D2000), attached onto the surface of graphene oxides.

Cited by 77 publications

References 37 publications

Synthesis of modified graphene oxide and its improvement on flame retardancy of epoxy resin

Synthesis of modified graphene oxide and its improvement on flame retardancy of epoxy resin

Amine-graphene oxide/waterborne polyurethane nanocomposites: effects of different amine modifiers on physical properties

Effects of crosslinking agents on the physical properties of polyimide/amino‐functionalized graphene oxide hybrid films

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