scholarly journals Polymer-graphene composites by photocuring of a system containing benzophenone macromer

2016 ◽  
Vol 81 (9) ◽  
pp. 1055-1068
Author(s):  
Florentina Jitaru ◽  
Andreea Chibac ◽  
George Epurescu ◽  
Ioana Ion ◽  
Tinca Buruiana
Keyword(s):  
Graphene Oxide ◽  
Hybrid Composites ◽  
Two Photon ◽  
Polymerization Kinetic ◽  
Composites Materials ◽  
Femtosecond Laser Beam ◽  
Reduced Graphene ◽  
Direct Laser ◽  
Xrd Techniques ◽  
Graphene Structures

Formulations incorporating benzophenone oligodimethacrylate (BP-DMA) and graphene structures (graphene oxide/GO, reduced graphene oxide/RGO) were exposed to UV/vis irradiation or femtosecond laser beam to achieve hybrid composites. All structures were characterized through various methods including 1H NMR and FTIR spectroscopies, optical microscopy, TEM, SEM/EDAX analysis, and DSC/XRD techniques. The photopolymerization of BP-DMA in monomer compositions with and without GO or RGO was investigated by photo-DSC and FTIR methods for determining the polymerization kinetic parameters. The photopolymerization experiments revealed a good photoreactivity of the monomers (degree of conversion: 65-77%) after 1 minute exposure to UV/vis irradiation and the addition of graphene (up to 0.5%), whereas the polymerization rate varied between 0.14 and 0.1 s-1. Moreover, two-photon photopolymerization of the formulations in presence/absence of GO or RGO nanosheets (0.1 wt.%) generated 2D microstructures by direct laser writing procedure. Also, the morphology and the properties of composites materials were analyzed.

scholarly journals Two-Photon Polymerization of Albumin Hydrogel Nanowires Strengthened with Graphene Oxide

Biomimetics ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 66
Author(s):  
Nikita Nekrasov ◽  
Natalya Yakunina ◽  
Vladimir Nevolin ◽  
Ivan Bobrinetskiy ◽  
Pavel Vasilevsky ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Nanoelectromechanical Systems ◽  
Force Microscopy ◽  
Two Photon ◽  
Direct Laser ◽  
Two Photon Polymerization

Multifunctional biomaterials can pave a way to novel types of micro- and nanoelectromechanical systems providing benefits in mimicking of biological functions in implantable, wearable structures. The production of biocomposites that hold both superior electrical and mechanical properties is still a challenging task. In this study, we aim to fabricate 3D printed hydrogel from a biocomposite of bovine serum albumin with graphene oxide (BSA@GO) using femtosecond laser processing. We have developed the method for functional BSA@GO composite nanostructuring based on both two-photon polymerization of nanofilaments and direct laser writing. The atomic-force microscopy was used to probe local electrical and mechanical properties of hydrogel BSA@GO nanowires. The improved local mechanical properties demonstrate synergistic effect in interaction of femtosecond laser pulses and novel composite structure.

Solvothermal Synthesis of Reduced Graphene Oxide/Ferroferric Oxide Hybrid Composites with Enhanced Microwave Absorption Properties

NANO ◽  
2017 ◽  
Vol 12 (12) ◽  
pp. 1750144 ◽  
Author(s):  
Ruiwen Shu ◽  
Meng Wang ◽  
Yingying Yang ◽  
Siyu Chang ◽  
Gengyuan Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Microwave Absorption ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Absorption Characteristic ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Ferroferric Oxide ◽  
Reduced Graphene

In this work, reduced graphene oxide (RGO)/ferroferric oxide (RGO/Fe3O4) hybrid composite was successfully fabricated by a facile one-step solvothermal method. The structure, chemical composition, morphology and magnetic properties of the samples were investigated in detail. Fe3O4 microspheres with an average diameter of 250[Formula: see text]nm were uniformly anchored on the surface of the RGO sheets without large aggregation. Moreover, the results demonstrated that the hybrid composite exhibited obviously enhanced microwave absorption properties compared with the pure Fe3O4 microspheres. The minimum reflection loss (RL) of the hybrid composite reached [Formula: see text]36.8[Formula: see text]dB at 17.2[Formula: see text]GHz with a thickness of 5.0[Formula: see text]mm and its effective absorption bandwidth (lower than [Formula: see text]10[Formula: see text]dB) was 3.9[Formula: see text]GHz with a thickness of 2.5[Formula: see text]mm. Significantly, the hybrid composite exhibited a dual-waveband absorption characteristic covering the C and Ku bands. Besides, the relationship between the matching thickness and peak frequency was reasonably explained according to the quarter-wavelength matching theory. Therefore, the obtained composite was a promising candidate for application in microwave absorption.

Non-aqueous approach to the preparation of reduced graphene oxide/α-Ni(OH)2 hybrid composites and their high capacitance behavior

2011 ◽  
Vol 47 (22) ◽  
pp. 6305 ◽  
Author(s):  
Jeong Woo Lee ◽  
Taebin Ahn ◽  
Devaraj Soundararajan ◽  
Jang Myoun Ko ◽  
Jong-Duk Kim
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hybrid Composites ◽  
High Capacitance ◽  
Reduced Graphene

Ternary Co3O4/NiO/reduced graphene oxide hybrid composites with improved electrochemical properties

2019 ◽  
Vol 45 (12) ◽  
pp. 15394-15399 ◽  
Author(s):  
Juan Wu ◽  
Jianheng Zhou ◽  
Qi Lin ◽  
Lei Luo ◽  
Qingshan Lu
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Properties ◽  
Reduced Graphene Oxide ◽  
Hybrid Composites ◽  
Reduced Graphene

An efficient thermoelectric material: preparation of reduced graphene oxide/polyaniline hybrid composites by cryogenic grinding

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 8988-8995 ◽  
Author(s):  
Weijie Wang ◽  
Qihao Zhang ◽  
Jianlin Li ◽  
Xia Liu ◽  
Lianjun Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Thermoelectric Properties ◽  
Thermoelectric Material ◽  
Hybrid Composites ◽  
Cryogenic Grinding ◽  
Reduced Graphene ◽  
Material Preparation

An alternative and facile strategy to fabricate conducting reduced graphene oxide/polyaniline (rGO/PANI) hybrid composites with highly enhanced thermoelectric properties is introduced. rGO and PANI were homogeneously mixed by cryogenic grinding.

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