One-step grafting of polymers to graphene oxide

Thomas, Helen R.; Phillips, Daniel J.; Wilson, Neil R.; Gibson, Matthew I.; Rourke, Jonathan P.

doi:10.1039/c5py01358e

Cited by 36 publications

(21 citation statements)

References 31 publications

(36 reference statements)

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“…From the C 1 s spectra, the peak obtained at 288.82 eV (O─C═O), 286.79 eV (C═O) and that due to the SP 2 carbon atom (284.46 eV) confirms the formation of GO from graphite (Fig. ) . The same peak is obtained for GO‐ g ‐PEG.…”

Section: Resultssupporting

confidence: 66%

Graphene Oxide as a Prospective Graft in Polyethylene Glycol for Enhancing the Toughness of Epoxy Nanocomposites

Jayan

Saritha

Deeraj

et al. 2020

Polymer Engineering & Sci

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Polyethylene glycol (PEG) was successfully grafted onto the surface of graphene oxide (GO) by the “grafting to” technique. PEG, GO as well as the PEG grafted GO (GO‐g‐PEG) was successfully incorporated into an epoxy matrix and subsequently cured using diethylenetoluenediamine (DETDA) to make epoxy nanocomposites. Mechanical, thermal, and rheological properties of the epoxy nanocomposites were studied to check the effectiveness of these fillers in the epoxy matrix. An improvement of 255% and 334% at a very low filler loading of about 0.1 wt% was observed in the fracture toughness of GO and GO‐g‐PEG loaded systems versus the neat epoxy. Toughening mechanisms are also explained by analyzing SEM images of the fractured surface. Modeling of rheological properties was carried out by following time‐independent Newtonian model. The homogeneity of the epoxy filler systems are explained with the help of Cole–Cole plots. The thermal stability of the filler loaded epoxy composites was examined in detail by TGA. Improvements in mechanical properties reveal the potential benefit of the grafting process in epoxy toughening. POLYM. ENG. SCI., 60:773–781, 2020. © 2020 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 66%

Graphene Oxide as a Prospective Graft in Polyethylene Glycol for Enhancing the Toughness of Epoxy Nanocomposites

Jayan

Saritha

Deeraj

et al. 2020

Polymer Engineering & Sci

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“…In general, two kinds of regions are non‐uniformly distributed in GOs, namely aromatic regions with unoxidized sp 2 ‐bonded benzene rings and oxidized regions decorated by highly reactive oxygenated moieties. The oxygen‐based functional groups are handles for further chemical modification and interfacing with other materials . However, the structure of GOs has remained elusive for decades, and their composition has been under considerable debate.…”

Section: Interfaces In Ionomers and Graphite Oxidesmentioning

confidence: 99%

“…Although 13 C‐enrichment and multidimensional NMR spectroscopy are extremely powerful to reveal the detailed structure of GOs, standard 1D spectra are certainly useful to verify the synthetic route of functionalized materials and to monitor reduction processes . For example, Rourke and co‐workers studied the direct grafting of a series of well‐defined water‐soluble poly( N ‐isopropylacrylamide) polymers with GO. 13 C NMR spectra showed a decrease in the intensity of the epoxide carbons and therefore confirmed the reaction on these epoxide sites.…”

Section: Interfaces In Ionomers and Graphite Oxidesmentioning

confidence: 99%

Understanding Surface and Interfacial Chemistry in Functional Nanomaterials via Solid‐State NMR

et al. 2017

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Surface and interfacial chemistry is of fundamental importance in functional nanomaterials applied in catalysis, energy storage and conversion, medicine, and other nanotechnologies. It has been a perpetual challenge for the scientific community to get an accurate and comprehensive picture of the structures, dynamics, and interactions at interfaces. Here, some recent examples in the major disciplines of nanomaterials are selected (e.g., nanoporous materials, battery materials, nanocrystals and quantum dots, supramolecular assemblies, drug-delivery systems, ionomers, and graphite oxides) and it is shown how interfacial chemistry can be addressed through the perspective of solid-state NMR characterization techniques.

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“…Both elements are prevalent in the polymer, cross‐linker, and the analyte. Meanwhile, two other smaller peaks have been detected at 400 and 401.5 eV; the former corresponds to the amide functional groups of the cross‐linker while the latter is assigned to the quaternary ammonium functionalites due to adsorbed TBAH supporting electrolyte. Figure C shows a highly intense oxygen 1s peak in between 530 and 536 eV, which can be attributed to the presence of the cross‐linker and morphine imprint molecule in the polymer film.…”

Section: Resultsmentioning

confidence: 99%

Capacitive Detection of Morphine via Cathodically Electropolymerized, Molecularly Imprinted Poly(p‐aminostyrene) Films

Vergara

Pernites

Tiu

et al. 2016

Macro Chemistry & Physics

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Highly sensitive and selective detection of morphine is exhibited using a capacitive transducer coated with cathodically electropolymerized and molecularly imprinted poly(p aminostyrene). Through molecular imprinting, morphine‐specific recognition sites have been fabricated throughout the film, which shows exceptional binding activity toward morphine based from electrochemical capacitance measurements. The thin film sensor has a linear response to morphine solutions with 20–40 × 10−6 m concentrations and a detection limit of 5.95 × 10−6 m. It demonstrates high selectivity toward morphine as compared to other analog molecules including nicotine and cholesterol. The formation of the polymer film is facilitated and monitored using electrochemical‐quartz crystal microbalance and characterized by X‐ray photoelectron spectroscopy. Infrared spectroscopy confirms the loading and removal of the analyte from the film. Based on molecular modeling calculations, strong hydrogen‐bonding interactions between the monomer, cross‐linker, and analyte form a stable pre‐polymerization complex, which is critical in successfully imprinting morphine into the film and effective sensing of the analyte.

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One-step grafting of polymers to graphene oxide

Cited by 36 publications

References 31 publications

Graphene Oxide as a Prospective Graft in Polyethylene Glycol for Enhancing the Toughness of Epoxy Nanocomposites

Graphene Oxide as a Prospective Graft in Polyethylene Glycol for Enhancing the Toughness of Epoxy Nanocomposites

Understanding Surface and Interfacial Chemistry in Functional Nanomaterials via Solid‐State NMR

Capacitive Detection of Morphine via Cathodically Electropolymerized, Molecularly Imprinted Poly(p‐aminostyrene) Films

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