Silane coupling agent grafted graphene oxide and its modification on polybenzoxazine resin

Xu, Peijun; Yan, Xiaotian; Cong, Peiliang; Zhu, Xingtian; Li, Danggang

doi:10.1080/09276440.2017.1254989

Cited by 21 publications

(12 citation statements)

References 27 publications

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“…For example, through the reaction of vinyltrimethoxysilane (VTMS) and GO in an aqueous medium, Abass et al obtained VTMS-reduced graphene oxide (rGO) nanospheres and pointed out the role of silane in both the successful exfoliation of rGO layers and the enhancement of the electrical conductivity [9]. With the final aim to prepare high-performance thermosetting resins, Xu et al modified GO with aminopropyltrimethoxysilane (APTMS); after reduction with hydrazine, the thermal resistance of functionalized GO appeared improved as did its dispersion ability in organic solvent, allowing the use of APTMS-rGO as filler for polybenzoxazine resins [10]. Moreover, Chen et al studied the APTMS-grafted GO as filler for polybenzoxazole (PBO) fibers and obtained a new hierarchical reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Organic Functional Group on the Grafting Ability of Trialkoxysilanes onto Graphene Oxide: A Combined NMR, XRD, and ESR Study

et al. 2019

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The functional properties displayed by graphene oxide (GO)-polymer nanocomposites are strongly affected by the dispersion ability of GO sheets in the polymeric matrix, which can be largely improved by functionalization with organosilanes. The grafting to GO of organosilanes with the general formula RSi(OCH3)3 is generally explained by the condensation reactions of silanols with GO reactive groups. In this study, the influence of the organic group on the RSi(OCH3)3 grafting ability was analyzed in depth, taking into account the interactions of the R end chain group with GO oxidized groups. Model systems composed of commercial graphene oxide reacted with 3-aminopropyltrimethoxysilane (APTMS), 3-mercaptopropyltrimethoxysilane (MPTMS), and 3-methacryloxypropyltrimethoxysilane, (MaPTMS), respectively, were characterized by natural abundance 13C, 15N and 29Si solid state nuclear magnetic resonance (NMR), x-ray diffraction (XRD), and electron spin resonance (ESR). The silane organic tail significantly impacts the grafting, both in terms of the degree of functionalization and direct interaction with GO reactive sites. Both the NMR and XRD proved that this is particularly relevant for APTMS and to a lower extent for MPTMS. Moreover, the epoxy functional groups on the GO sheets appeared to be the preferential anchoring sites for the silane condensation reaction. The characterization approach was applied to the GO samples prepared by the nitric acid etching of graphene and functionalized with the same organosilanes, which were used as a filler in acrylic coatings obtained by cataphoresis, making it possible to correlate the structural properties and the corrosion protection ability of the layers.

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Section: Introductionmentioning

confidence: 99%

Effect of the Organic Functional Group on the Grafting Ability of Trialkoxysilanes onto Graphene Oxide: A Combined NMR, XRD, and ESR Study

et al. 2019

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“…These silane coupling agents consist of organosilanes, (R 1 , R 2 , R 3 )SiX n , where X substituents are hydrolysable to form RSi(OH) 3 when reacted with water, whereas the R groups are usually unreactive 18 . Different silane agents such as aminopropyltriethoxy silane (APTES) [19][20][21][22][23][24] , triethoxymethoxysilane (MTES), 3-glycidyloxypropyl trimethoxysilane (GPTMS) [25][26][27] and triethoxysilane (TEOS) [28][29][30] , have been widely explored and investigated for GO functionalization. However, to the best of our knowledge no studies have been reported that have focused on using vinyltrimethoxysilane (VTMOS) to modify reduced GO (rGO).…”

Section: Introductionmentioning

confidence: 99%

Facile silane functionalization of graphene oxide

et al. 2018

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The facile silane functionalization of graphene oxide (GO) was achieved yielding vinyltrimethoxysilane-reduced graphene oxide (VTMOS-rGO) nanospheres located in the inter-layer spacing between rGO sheets via an acid-base reaction using aqueous media. The successful grafting of the silane agent with pendant vinyl groups to rGO was confirmed by a combination of Fourier-transform infrared (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The structure and speciation of the silane-graphene network (nanosphere) and, the presence of free vinyl groups was verified from solid-state magic angle spinning (MAS) and solution 13C and 29Si nuclear magnetic resonance (NMR) measurements. Evidence from Scanning Electron Microscopy (SEM), High-Resolution Transmission Electron Microscopy (HRTEM) and TEM-High-Angle Annular Dark-Field (TEM-HAADF) imaging showed that these silane networks aided the exfoliation of the rGO layers preventing agglomeration, the interlayer spacing increased by 10 Å. The thermal stability (TGA/DTA) of VTMOS-rGO was significantly improved relative to GO, displaying just one degradation process for the silane network some 300 °C higher than either VTMOS or GO alone. The reduction of GO to VTMOS-rGO induced sp2 hybridization and enhanced the electrical conductivity of GO by 105 S m-1.

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“…In the last few years, researchers' interest in GO/polymer composites has increased significantly. Several studies are reported in literature regarding the production of PBZ/GO composites by physical blending using various solvents . All studies showed an improvement regarding the mechanical, thermal, and toughness properties after incorporation of GO in the PBZ matrix due to enhanced interactions between the reactants, but more importantly, an accentuated catalytic effect regarding the ring‐opening polymerization of BZ monomers in the presence of GO was observed which is not that pronounced in the presence of non‐functionalized graphene.…”

Section: Polybenzoxazine/carbon Materials Compositesmentioning

confidence: 98%

Developing Polybenzoxazine Composites Based on Various Carbon Structures

Bîru

Gârea

Iovu

2019

Macro Chemistry & Physics

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The synthesis of composite materials based on various carbon structures and polybenzoxazines (PBZs) gives products with noticeable thermal, electrical, and mechanical properties. The role of different carbon materials is emphasized in terms of the main advantages in both structure and properties. On the other hand, the PBZ features are significant considering the high glass transition temperatures, low flammability, high char yields, and good thermal stability. This review article describes the synthesis, structure, and properties of polybenzoxazine composites based on carbon fibers, carbon nanotubes, graphene, graphene oxide, and other carbonaceous materials. Particular attention is given to the interactions possible to occur between the polybenzoxazine matrix and carbon component.

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Silane coupling agent grafted graphene oxide and its modification on polybenzoxazine resin

Cited by 21 publications

References 27 publications

Effect of the Organic Functional Group on the Grafting Ability of Trialkoxysilanes onto Graphene Oxide: A Combined NMR, XRD, and ESR Study

Effect of the Organic Functional Group on the Grafting Ability of Trialkoxysilanes onto Graphene Oxide: A Combined NMR, XRD, and ESR Study

Facile silane functionalization of graphene oxide

Developing Polybenzoxazine Composites Based on Various Carbon Structures

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