Improvement of interfacial properties in bismaleimide composites using functionalized graphene oxide grafted carbon fiber

2017 ◽  
Vol 58 (6) ◽  
pp. 886-893 ◽  
Author(s):  
Wei Li ◽  
Qiang Li ◽  
Yuan Zhi Yue ◽  
Ming Yu Wang ◽  
Rong Ren
Keyword(s):  
Graphene Oxide ◽  
Carbon Fiber ◽  
Interfacial Properties ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide

scholarly journals Effects of Non-Covalent Functionalized Graphene Oxide with Hyperbranched Polyesters on Mechanical Properties and Mechanism of Epoxy Composites

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3103 ◽  
Author(s):  
Jin Tian ◽  
Ting Xu ◽  
Yefa Tan ◽  
Zhongwei Zhang ◽  
Binghui Tang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Interfacial Properties ◽  
Propagation Path ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Hyperbranched Polyesters ◽  
Microcrack Propagation ◽  
Wetting Property ◽  
Ep Matrix

In order to improve the interfacial properties of graphene oxide (GO) and epoxy resin (EP), hyperbranched polyesters with terminal carboxyl (HBP) non-covalently functionalized graphene oxide (HBP-GO) was achieved by strong π-π coupling between hyperbranched polyesters and GO nanosheets. The effects of non-covalent functionalization of GO on the dispersibility, wettability and interfacial properties were analyzed. The mechanical properties and enhancement mechanism of HBP-GO/EP composites were investigated. The results show that the hyperbranched polyesters is embedded in the GO layer due to its highly branched structure, which forms the steric hindrance effect between the GO nanosheets, effectively prevents the agglomeration of GO nanosheets, and significantly improved the dispersibility of GO. Simultaneously, the contact angle of HBP-GO with EP is reduced, the surface energy, interfacial energy and adhesion work are increased, then the wetting property of HBP-GO is significantly improved. The main toughening mechanism of HBP-GO is microcrack deflection induced by HBP-GO and plastic deformation of the EP matrix. In the microcrack propagation zones, HBP-GO may produce the pinning effect near the microcrack tips and change their stress state, resulting in microcrack deflection and bifurcation. So, the microcrack propagation path is more tortuous, which will consume much more fracture energy. Therefore, the mechanical properties of the HBP-GO/EP composites are greatly improved.

scholarly journals Computational Modeling of Hybrid Carbon Fiber/Epoxy Composites Reinforced with Functionalized and Non-Functionalized Graphene Nanoplatelets

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2919
Author(s):  
Hashim Al Mahmud ◽  
Matthew S. Radue ◽  
William A. Pisani ◽  
Gregory M. Odegard
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Carbon Fiber ◽  
Hybrid Composites ◽  
Graphene Nanoplatelets ◽  
Functionalized Graphene ◽  
Graphene Nanoplatelet ◽  
Functionalized Graphene Oxide ◽  
Volume Fractions ◽  
Aspect Ratios

The mechanical properties of aerospace carbon fiber/graphene nanoplatelet/epoxy hybrid composites reinforced with pristine graphene nanoplatelets (GNP), highly concentrated graphene oxide (GO), and Functionalized Graphene Oxide (FGO) are investigated in this study. By utilizing molecular dynamics data from the literature, the bulk-level mechanical properties of hybrid composites are predicted using micromechanics techniques for different graphene nanoplatelet types, nanoplatelet volume fractions, nanoplatelet aspect ratios, carbon fiber volume fractions, and laminate lay-ups (unidirectional, cross-ply, and angle-ply). For the unidirectional hybrid composites, the results indicate that the shear and transverse properties are significantly affected by the nanoplatelet type, loading and aspect ratio. For the cross-ply and angle ply hybrid laminates, the effect of the nanoplate’s parameters on the mechanical properties is minimal when using volume fractions and aspect ratios that are typically used experimentally. The results of this study can be used in the design of hybrid composites to tailor specific laminate properties by adjusting nanoplatelet parameters.

Polymer Functionalized Graphene Oxide: A Versatile Nanoplatform for Drug/Gene Delivery

2015 ◽  
Vol 19 (18) ◽  
pp. 1828-1837 ◽  
Author(s):  
George V. Theodosopoulos ◽  
Panayiotis Bilalis ◽  
Georgios Sakellariou
Keyword(s):  
Graphene Oxide ◽  
Gene Delivery ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide
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