Influence of Polymer Matrix on Polymer/Graphene Oxide Nanocomposite Intrinsic Properties

2021 ◽  
Vol 3 (10) ◽  
pp. 5145-5154
Author(s):  
Bich Ngoc Tran ◽  
Stuart C. Thickett ◽  
Vipul Agarwal ◽  
Per B. Zetterlund
Keyword(s):  
Graphene Oxide ◽  
Polymer Matrix ◽  
Intrinsic Properties

In situ iodoalkane-reduction of graphene oxide in a polymer matrix: an easy and effective approach for the fabrication of conductive composites

2015 ◽  
Vol 3 (43) ◽  
pp. 11531-11539 ◽  
Author(s):  
Haiquan Guo ◽  
Fangfang Liu ◽  
Jianying Zhao ◽  
Haibo Yao ◽  
Rizhe Jin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Polymer Matrix ◽  
Conductive Composites ◽  
Polyimide Composites

Graphene/polyimide composites with the conductivity of 2.22 S m−1 were fabricated via in situ reduction of graphene oxide by 1,2-diiodoethane.

scholarly journals Modeling the Effective Conductive Properties of Polymer Nanocomposites with a Random Arrangement of Graphene Oxide Particles

2021 ◽  
pp. 167-180
Author(s):  
M. A Tashkinov ◽  
A. D Dobrydneva ◽  
V. P Matveenko ◽  
V. V Silberschmidt
Keyword(s):  
Finite Element ◽  
Graphene Oxide ◽  
Composite Materials ◽  
Polymer Matrix ◽  
Matrix Cracking ◽  
Tunneling Effect ◽  
Representative Volume ◽  
Representative Volume Elements ◽  
Oxide Particles ◽  
Conductive Properties

Сomposite materials are widely used in various industrial sectors, for example, in the aviation, marine and automotive industries, civil engineering and others. Methods based on measuring the electrical conductivity of a composite material have been actively developed to detect internal damage in polymer composite materials, such as matrix cracking, delamination, and other types of defects, which make it possible to monitor a composite’s state during its entire service life. Polymers are often used as matrices in composite materials. However, almost always pure polymers are dielectrics. The addition of nanofillers, such as graphene and its derivatives, has been successfully used to create conductive composites based on insulating polymers. The final properties of nanomodified composites can be influenced by many factors, including the type and intrinsic properties of nanoscale objects, their dispersion in the polymer matrix, and interphase interactions. The work deals with modeling of effective electric conductive properties of the representative volume elements of nanoscale composites based on a polymer matrix with graphene oxide particles distributed in it. In particular, methods for evaluating effective, electrically conductive properties have been studied, finite element modelling of representative volumes of polymer matrices with graphene oxide particles have been performed, and the influence of the tunneling effect and the orientation of inclusions on the conductive properties of materials have been investigated. The possibility of using models of resistive strain gauges operating on the principle of the tunneling effect is studied. Based on the finite-element modeling and graph theory tools, we created approaches for estimating changes in the conductive properties of the representative volume elements of a nanomodified matrix subjected to mechanical loading.

Phase miscibility and dynamic heterogeneity in PMMA/SAN blends through solvent free reactive grafting of SAN on graphene oxide

2018 ◽  
Vol 20 (29) ◽  
pp. 19470-19485 ◽  
Author(s):  
Tanyaradzwa S. Muzata ◽  
Jagadeshvaran P. L. ◽  
Goutam Prasanna Kar ◽  
Suryasarathi Bose
Keyword(s):  
Spatial Distribution ◽  
Graphene Oxide ◽  
Polymer Matrix ◽  
Solvent Free ◽  
Dynamic Heterogeneity ◽  
Coated Nanoparticles ◽  
Host Polymer

The spatial distribution of nanoparticles in a particular host polymer matrix can be improved by using brush coated nanoparticles.

scholarly journals Bio-Nanocomposite Hydrogel Based on Zinc Alginate/Graphene Oxide: Morphology, Structural Conformation, Thermal Behavior/Degradation, and Dielectric Properties

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 702 ◽  
Author(s):  
Roser Sabater i Serra ◽  
José Molina-Mateo ◽  
Constantino Torregrosa-Cabanilles ◽  
Andreu Andrio-Balado ◽  
José María Meseguer Dueñas ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Polymer Matrix ◽  
Wound Care ◽  
Crosslinking Agent ◽  
Charge Carrier Mobility ◽  
Dielectric Behavior ◽  
Compact Structure ◽  
Nanocomposite Hydrogels ◽  
Box Structure ◽  
Zn Ions

Bio-nanocomposite hydrogels based on sodium alginate (SA) as polymer matrix and graphene oxide (GO) nanosheets with zinc as crosslinking agent were synthesized with the aim of incorporating the intrinsic properties of their constituents (bioactivity and antimicrobial activity). Thus, stable and highly interconnected networks were obtained from GO nanosheets dispersed in SA matrices through interactions with low amounts of zinc. The GO nanosheets were successfully incorporated into the alginate matrix in the form of a complex nano-network involving different interactions: Bonds between alginate chains induced by Zn ions (egg box structure), interactions between GO nanosheets through Zn ions and hydrogen bonds between alginate chains, and GO nanosheets. The molecular interactions and morphology were confirmed by Fourier-transform infrared spectroscopy and transmission electron microscopy. The composite’s structural organization showed enhanced thermal stability. The glass transition temperature shifted to a higher temperature due to the reduced mobility induced by additional crosslinking bonds after incorporating the GO nanosheets and Zn into the polymer matrix. Finally, the dielectric behavior revealed that charge carrier mobility was hampered by the compact structure of the nanonetwork, which reduced conductivity. The combined properties of these nanocomposite hydrogels make them attractive biomaterials in the field of regenerative medicine and wound care since both surface bioactivity and antibacterial behavior are two critical factors involved in the success of a biomaterial.

Magnetic field-assisted alignment of graphene oxide nanosheets in a polymer matrix to enhance ionic conduction

2018 ◽  
Vol 563 ◽  
pp. 259-269 ◽  
Author(s):  
Wei-Ting Ma ◽  
S. Rajesh Kumar ◽  
Chun-Ting Hsu ◽  
Chao-Ming Shih ◽  
Shiao-Wen Tsai ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Graphene Oxide ◽  
Polymer Matrix ◽  
Ionic Conduction ◽  
Graphene Oxide Nanosheets

scholarly journals Graphene Oxide Incorporated Polysulfone Substrate for Flat Sheet Thin Film Nanocomposite Pressure Retarded Osmosis Membrane

Membranes ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 416
Author(s):  
Siti Nur Amirah Idris ◽  
Nora Jullok ◽  
Woei Jye Lau ◽  
Hui Lin Ong ◽  
Cheng-Di Dong
Keyword(s):  
Thin Film ◽  
Graphene Oxide ◽  
Polymer Matrix ◽  
Water Flux ◽  
Weight Percent ◽  
Inversion Method ◽  
High Porosity ◽  
Pressure Retarded Osmosis ◽  
Flat Sheet ◽  
Thin Film Nanocomposite

This study focuses on the development of flat sheet thin film nanocomposite (TFN) pressure retarded osmosis (PRO) membranes for the enhancement of osmotic power generation by the incorporation of laboratory-synthesised graphene oxide (GO) into the polysulfone (PSf) polymer matrix. A series of membranes containing different weight percent of GO (0, 0.1, 0.25, 0.5 and 1.0 wt%) were fabricated via a phase inversion method with polyethylene glycol (PEG) as the pore forming agent. The results show that the TFN-0.25GO membrane has excellent water flux, salt reverse flux, high porosity and an enhanced microvoids morphology compared to the control membrane. The highest power density was achieved when TFN-0.25GO was used is 8.36 Wm−2 at pressure >15 bar. It was found that the incorporation of GO into the polymer matrix has significantly improved the intrinsic and mechanical properties of the membrane.

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