A comprehensive study of various amine-functionalized graphene oxides for room temperature formaldehyde gas detection: Experimental and theoretical approaches

Song, Minseok; Choi, Jounghwan; Jeong, Ha Eun; Song, KyongHwa; Jeon, Sungwan; Cha, JinHyeok; Baeck, Sung‐Hyeon; Shim, Sang Eun; Qian, Yingjie

doi:10.1016/j.apsusc.2020.147189

Cited by 27 publications

(9 citation statements)

References 53 publications

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“…N-butylamine functionalized GO (GO-ButA) NPs were reported to have better dispersibility and stability in polymeric solutions and provide higher mechanical stability for polymeric composites [10,11]. Other applications of the aminated GO NPs include sensing applications [12], supercapacitors [13], catalysis [14], CO 2 adsorption [15], and microwave adsorption [16]. Table 1 summarizes the recently reported amine-functionalized GO NPs and their applications.…”

Section: Introductionmentioning

confidence: 99%

Polydopamine Functionalized Graphene Oxide as Membrane Nanofiller: Spectral and Structural Studies

2021

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High-degree functionalization of graphene oxide (GO) nanoparticles (NPs) using polydopamine (PDA) was conducted to produce polydopamine functionalized graphene oxide nanoparticles (GO-PDA NPs). Aiming to explore their potential use as nanofiller in membrane separation processes, the spectral and structural properties of GO-PDA NPs were comprehensively analyzed. GO NPs were first prepared by the oxidation of graphite via a modified Hummers method. The obtained GO NPs were then functionalized with PDA using a GO:PDA ratio of 1:2 to obtain highly aminated GO NPs. The structural change was evaluated using XRD, FTIR-UATR, Raman spectroscopy, SEM and TEM. Several bands have emerged in the FTIR spectra of GO-PDA attributed to the amine groups of PDA confirming the high functionalization degree of GO NPs. Raman spectra and XRD patterns showed different crystalline structures and defects and higher interlayer spacing of GO-PDA. The change in elemental compositions was confirmed by XPS and CHNSO elemental analysis and showed an emerging N 1s core-level in the GO-PDA survey spectra corresponding to the amine groups of PDA. GO-PDA NPs showed better dispersibility in polar and nonpolar solvents expanding their potential utilization for different purposes. Furthermore, GO and GO-PDA-coated membranes were prepared via pressure-assisted self-assembly technique (PAS) using low concentrations of NPs (1 wt. %). Contact angle measurements showed excellent hydrophilic properties of GO-PDA with an average contact angle of (27.8°).

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Section: Introductionmentioning

confidence: 99%

Polydopamine Functionalized Graphene Oxide as Membrane Nanofiller: Spectral and Structural Studies

2021

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“…It can be seen that C, O, N, and Cu elements disperse uniformly on the surface of the PA–Gr–Cu film, and the corresponding element composition is shown in Table . The presence of N in the PA–Gr–Cu film once again demonstrates the successful functionalization of phenylamine groups onto graphene and the successful assembly of phenylamine-functionalized graphene onto the copper substrate surface . The presence of Cu also demonstrates the successful co-electrodeposition and chemical bonding of PA–Gr and Cu 2+ .…”

Section: Resultsmentioning

confidence: 81%

“…The presence of N in the PA−Gr−Cu film once again demonstrates the successful functionalization of phenylamine groups onto graphene and the successful assembly of phenylamine-functionalized graphene onto the copper substrate surface. 43 The presence of Cu also demonstrates the successful co-electrodeposition and chemical bonding of PA− Gr and Cu 2+ . The interface structure in the cross-section between the Cu substrate and PA−Gr−Cu film was observed from a 45°view, as shown in Figure 5.…”

Section: Resultsmentioning

confidence: 92%

Phenylamine-Functionalized Graphene–Copper Composites with High Thermal Conductivity: Implications for Thermal Dissipation

et al. 2021

ACS Appl. Nano Mater.

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Developing highly efficient thermal management techniques is crucial in order to achieve the best performance of electronic equipment. Here, a delocalized conjugated system was established by the conjugation of sp 2 orbitals in phenylamine groups and a delocalized big π bond in graphene to construct an electron thermal conduction route. Then, the abundant π electrons in graphene can be transferred to the adjacent copper unimpededly, leading to a remarkable thermal conductivity. These results demonstrate that the copper substrate deposited with phenylamine-functionalized graphene (PA−Gr−Cu) shows a high thermal conductivity of 506 W m −1 k −1 , which is 30.8 and 44.2% higher than those of the pristine graphene−copper composite (Gr−Cu) and copper (Cu), respectively. Placed on a heat source heated from 30 to 210 °C within 5 min, the top surface temperature of PA−Gr−Cu increases to 198 °C rapidly, whereas those of Gr−Cu and Cu only increase gently to 88 and 59 °C. This work demonstrates that phenylamine with a pair of lone electrons in the N atom shows superiority as an intermediate molecule to link graphene and copper to establish a delocalized conjugated system. This innovation provides another solution to establish a conjugated structure between graphene and copper to construct an electron thermal conduction route with remarkable thermal conduction properties and will promote the research on the electron thermal conduction route for graphene-based metal matrix composites in the application of thermal dissipation.

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“…Moreover, XPS was employed to further characterize the surface groups of PDMS-NH 2 -g-G and PI-MA-g-G. Based on Figure S2, reducing the intensity of oxygenated peaks at 1384 cm À1 ( O ), 1630 cm À1 , and 1726 cm À1 (C O) and the presence of the C N and N H peaks at 1020 and 1580 cm À1 not only indicate the successful grafting of the PDMS-NH 2 on the graphene surface but also reveal the reduction of GO. 28 Moreover, the band related to the ester group at 1100 and 1172 cm À1 demonstrates the PI-MA grafting on the GO surface. [29][30][31] The resonance peaks at 3.91 ( CH 2 NH ), and 9.31 ( COOH), 2.02 ( CH 2 : PI-MA), 2.48 ( CH 2 : Maleic anhydride group) support the bonding chemistry between PDMS-NH 2 and PI-MA with GO after grafting [32][33][34] (Figure S3).…”

Section: Characterization Of Pdms-nh 2 -G-g and Pi-ma-g-gmentioning

confidence: 99%

Compatibilization of immiscible polymer blends by reactive polymer grafted graphene with interfacial crosslinking

Gavgani

Goharpey

2023

J of Applied Polymer Sci

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We investigate reactive compatibilization by applying two multifunctional polymers grafted on a graphene surface, which leads to crosslinked interphase at immiscible polymer blends. Reactive compatibilizer‐grafted graphene (RCG) nanoparticles were synthesized through esterification and amidation reactions between oxidative groups of graphene oxide and reactive multifunctional groups of polymers. Polymer blends of polyisoprene (PI) and polydimethysiloxane (PDMS) with PI:PDMS ratio of 30:70 or 70:30 and RCG nanoparticle loadings from 0.1 and 1 wt% were evaluated by optical microscopy and rheometry. The results indicated that the blend with 0.1 wt% RCG showed unusual characteristics including nonspherical and bridged droplets, while those containing 1 wt% RCG showed usual droplet‐matrix morphology. The rheological results are also asymmetric: the blend with 0.1 wt% RCG displayed gel‐like behavior in the dynamic oscillatory tests, high viscosity, slow interfacial relaxation during startup shear flow, and divergence in the transient stress response due to coalesced and bridged droplets. However, the latter blend containing 1 wt% RCG reveals liquid‐like behavior, low viscosity, and convergence in the transient stress response due to stabilized droplet‐matrix morphology. Overall, it was suggested that these asymmetries are attributable to interfacial crosslinked interphase formed through an in‐situ reaction between multifunctional polymers grafted on graphene sheets.

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A comprehensive study of various amine-functionalized graphene oxides for room temperature formaldehyde gas detection: Experimental and theoretical approaches

Cited by 27 publications

References 53 publications

Polydopamine Functionalized Graphene Oxide as Membrane Nanofiller: Spectral and Structural Studies

Polydopamine Functionalized Graphene Oxide as Membrane Nanofiller: Spectral and Structural Studies

Phenylamine-Functionalized Graphene–Copper Composites with High Thermal Conductivity: Implications for Thermal Dissipation

Compatibilization of immiscible polymer blends by reactive polymer grafted graphene with interfacial crosslinking

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