Green synthesis of soluble graphene in organic solvent via simultaneous functionalization and reduction of graphene oxide with urushiol

Cheng, Hongyang; Lin, Jianrong; Su, Yanning; Chen, Denglong; Zheng, Xiaowei; Zhu, Hu

doi:10.1016/j.mtcomm.2020.100938

Cited by 10 publications

(15 citation statements)

References 36 publications

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“…As for the bands at 1242 and 1186 cm −1 , they refer to the stretching of C–O–C bands of epoxy, but mostly in the phenolic groups present in the ramie fiber constituents [ 41 ]. On the other hand, bands at 1112 and 1037 cm −1 have been assigned to C–O stretching vibration in the epoxy chain [ 52 , 64 , 65 ]. Finally, the band at 833 cm −1 is associated with stretching C–O–C of the oxirane group [ 66 ].…”

Section: Resultsmentioning

confidence: 99%

“…A striking difference is the greater intensities of the bands at 1243 cm −1 , 1104 cm −1 and 1030 cm −1 for the GO-incorporated epoxy composite in Figure 11 as compared with the corresponding ones for the GO-free composite in Figure 10 . These bands involve the vibration of O-containing groups in which their intensities were obviously enhanced by the GO [ 64 ]. This may be interpreted as an effective interaction of the GO with the epoxy and probably a good distribution of GO in the composite matrix, which contributes not only to enhance mechanical properties but also to improve the ballistic performance of the GO-incorporated composite [ 4 ].…”

Section: Resultsmentioning

confidence: 99%

“…These behaviors are common in polymeric composite materials, and XRD analysis is not necessarily a better tool for determining dispersion homogeneity. The use of the high magnification electron microscope can help with these data [ 12 , 64 ], which is being conducted in our ongoing research work.…”

Section: Resultsmentioning

confidence: 99%

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Ballistic Performance of Ramie Fabric Reinforcing Graphene Oxide-Incorporated Epoxy Matrix Composite

et al. 2020

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Graphene oxide (GO) incorporation in natural fiber composites has recently defined a novel class of materials with enhanced properties for applications, including ballistic armors. In the present work, the performance of a 0.5 vol % GO-incorporated epoxy matrix composite reinforced with 30 vol % fabric made of ramie fibers was investigated by stand-alone ballistic tests against the threat of a 0.22 lead projectile. Composite characterization was also performed by Fourier-transform infrared spectroscopy, thermal analysis and X-ray diffraction. Ballistic tests disclosed an absorbed energy of 130 J, which is higher than those reported for other natural fabrics epoxy composite, 74–97 J, as well as plain Kevlar (synthetic aramid fabric), 100 J, with the same thickness. This is attributed to the improved adhesion between the ramie fabric and the composite matrix due to the GO—incorporated epoxy. The onset of thermal degradation above 300 °C indicates a relatively higher working temperature as compared to common natural fiber polymer composites. DSC peaks show a low amount of heat absorbed or release due to glass transition endothermic (113–121 °C) and volatile release exothermic (~132 °C) events. The 1030 cm−1 prominent FTIR band, associated with GO bands between epoxy chains and graphene oxide groups, suggested an effective distribution of GO throughout the composite matrix. As expected, XRD of the 30 vol % ramie fabric-reinforced GO-incorporated epoxy matrix composite confirmed the displacement of the (0 0 1) peak of GO by 8° due to intercalation of epoxy chains into the spacing between GO layers. By improving the adhesion to the ramie fabric and enhancing the thermal stability of the epoxy matrix, as well as by superior absorption energy from projectile penetration, the GO may contribute to the composite effective ballistic performance.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Ballistic Performance of Ramie Fabric Reinforcing Graphene Oxide-Incorporated Epoxy Matrix Composite

et al. 2020

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“…Experimental studies have found that when the ratio of caffeic acid powder to GO powder is 50 : 1 and the reaction time is 24 h, the C/O ratio in the graphene product can reach 7.15, and the contact angle increased from 36 to 92 . Cheng et al 23 used urushiol (an extract of natural sumac) to study the reduction of GO. TGA test results found that the reduced graphene sample has only 8% mass loss at 300 C. Liu's research group 24 adopted bovine serum albumin as raw material, and GO can be successfully reduced by adjusting the pH of the reaction.…”

Section: Introductionmentioning

confidence: 99%

Characteristic analysis of three-ecofriendly reduced graphene oxides (rGOs) and their application in water–ethanol-based fluids with different volume ratios

Duan

et al. 2022

RSC Adv.

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“…The as-prepared powders manifested excellent antibacterial activity, good antioxidant activity, and very high thermal stability. Cheng et al [ 12 ] proposed an efficient and green approach to simultaneously reduce and functionalize graphene with urushiol. Urushiol with unsaturated long alkyl chains was modified on the graphene surface to disperse graphene in the organic solvent and the polymer matrix, resulting in enhanced interfacial interaction between graphene and the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Nanoscale Urushiol/PAN Films to Evaluate Their Acid Resistance and Protection of Functional PVP Films

Shiu

Zhang

et al. 2021

Nanomaterials

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Different amounts of urushiol were added to a fixed amount of polyacrylonitrile (PAN) to make nanoscale urushiol/PAN films by the electrospinning method. Electrospinning solutions were prepared by using dimethylformamide (DMF) as the solvent. Nanoscale urushiol/PAN films and conductive Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)/polyvinyl pyrrolidone (PVP) films were prepared by electrospinning. In order to prepare an electrospun sandwich nanoscale film, urushiol/PAN films were deposited as both the top and bottom layers and PEDOT:PSS/PVP film as the inner layer. When the PAN to urushiol ratio was 7:5, the fiber diameter ranged between 150 nm and 200 nm. The single-layer urushiol/PAN film could not be etched after being immersed into 60%, 80%, and 100% sulfuric acid (H2SO4) for 30 min, which indicated the improved acid resistance of the PAN film. The urushiol/PAN film was used to fabricate the sandwich nanoscale films. When the sandwich film was immersed into 80% and 100% H2SO4 solutions for 30 min, the structure remained intact, and the conductive PVP film retained its original properties. Thus, the working environment tolerability of the functional PVP film was increased.

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Green synthesis of soluble graphene in organic solvent via simultaneous functionalization and reduction of graphene oxide with urushiol

Cited by 10 publications

References 36 publications

Ballistic Performance of Ramie Fabric Reinforcing Graphene Oxide-Incorporated Epoxy Matrix Composite

Ballistic Performance of Ramie Fabric Reinforcing Graphene Oxide-Incorporated Epoxy Matrix Composite

Characteristic analysis of three-ecofriendly reduced graphene oxides (rGOs) and their application in water–ethanol-based fluids with different volume ratios

Preparation of Nanoscale Urushiol/PAN Films to Evaluate Their Acid Resistance and Protection of Functional PVP Films

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