Effects of hyperbranched polyamide functionalized graphene oxide on curing behaviour and mechanical properties of epoxy composites

2018 ◽  
Vol 71 ◽  
pp. 145-155 ◽  
Author(s):  
Zehao Qi ◽  
Yefa Tan ◽  
Li Gao ◽  
Cuiping Zhang ◽  
Lulu Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Epoxy Composites ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Hyperbranched Polyamide

Incorporation of hyperbranched polyamide‐functionalized graphene oxide into epoxy for improving interfacial and mechanical properties

2019 ◽  
Vol 68 (8) ◽  
pp. 1492-1501 ◽  
Author(s):  
Xiaoqian Mi ◽  
Fang Wei ◽  
Liang Zeng ◽  
Liuyue Zhong ◽  
Junheng Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Hyperbranched Polyamide

scholarly journals Synergistic effect of functionalized graphene oxide and carbon nanotube hybrids on mechanical properties of epoxy composites

RSC Advances ◽  
2018 ◽  
Vol 8 (67) ◽  
pp. 38689-38700 ◽  
Author(s):  
Zehao Qi ◽  
Yefa Tan ◽  
Zhongwei Zhang ◽  
Li Gao ◽  
Cuiping Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Synergistic Effect ◽  
3D Structure ◽  
Epoxy Composites ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide

The 3D structure hybrids obtained by combining CNT and epoxy functionalized GO exhibit an obvious synergistic effect on the improvement of mechanical properties of epoxy composites.

The correlated effects of polyetheramine-functionalized graphene oxide loading on the curing reaction and the mechanical properties of epoxy composites

2021 ◽  
pp. 095400832199675
Author(s):  
Junpeng Tian ◽  
Cheng Yang ◽  
Jiping Yang ◽  
Shuangqiang Shi ◽  
Sijia Hao
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Epoxy Composite ◽  
Flexural Modulus ◽  
Chemical Properties ◽  
Interfacial Structure ◽  
Epoxy Composites ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Curing Reaction

In this study, the effects of polyetheramine (D230) functionalized graphene oxide loading on the curing reaction, thermal and mechanical properties of epoxy composites were studied and the correlation between structure and property of epoxy composite was established. In the functionalization of graphene oxide (GO), the effect of the mass ratio of D230 to GO on chemical properties of the functionalized GO was investigated. Results showed that D230 were successfully covalently grafted onto surface of two-dimensional functionalized GO sheet. The functionalized GO sheets prepared under optimal condition of D230/GO ratio of 1:1 dispersed evenly in epoxy composites, indicating the possibility of the epoxy composite fabrication by the solvent-free technique. The analysis of qualitative Cure Index suggested that epoxy composites were subjected to excellent curing. The quantitative evaluation of curing kinetics demonstrated that the functionalized GO exhibited a chemical facilitation on the curing reaction. However, the functionalized GO simultaneously physically restricted the curing reactivity, especially at high loading. These contributed to the improved interfacial properties and high toughness of the epoxy composites. Compared to neat epoxy, the epoxy composites showed effective tensile strength improvement of ∼10.0% (77.0 MPa), tensile modulus enhancement of ∼7.7% (3.34 GPa), flexural modulus increment of ∼12.1% (3.43 GPa), and flexural strength increment of ∼10.6% (124.3 MPa). This study demonstrated an effective and environment-friendly strategy to design GO reinforced epoxy composites with favorable dispersion and interfacial bonding, and it further clarified the relationship between the crosslinking network/interfacial structure and the mechanical properties of epoxy composites.

COMPUTATIONAL MODELING OF EPOXY-BASED HYBRID COMPOSITES REINFORCED WITH CARBON FIBERS AND FUNCTIONALIZED GRAPHENE NANOPLATELETS

2021 ◽  
Author(s):  
HASHIM AL MAHMUD ◽  
, MATTHEW RADUE ◽  
WILLIAM PISANI ◽  
GREGORY ODEGARD
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Hybrid Composites ◽  
Graphene Nanoplatelets ◽  
Pristine Graphene ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Aspect Ratios ◽  
The Impact ◽  
Nanoscale Level

The impact on the mechanical properties of unidirectional carbon fiber (CF)/epoxy composites reinforced with pristine graphene nanoplatelets (GNP), highly concentrated graphene oxide (GO), and Functionalized Graphene Oxide (FGO) are investigated in this study. The localized reinforcing effect of each of the graphene nanoplatelet types on the epoxy matrix is predicted at the nanoscale-level by molecular dynamics. The bulk-level mechanical properties of unidirectional CF/epoxy hybrid composites are predicted using micromechanics techniques considering the reinforcing function, content, and aspect ratios for each of the graphene nanoplatelets. In addition, the effect of nanoplatelets dispersion level is also investigated for the pristine graphene nanoplatelets considering a lower dispersion level with four layers of graphene nanoplatelets (4GNP). The results indicate that the shear and transverse properties are significantly affected by the nanoplatelet type, loading and aspect ratio. The results of this study can be used in the design of hybrid composites to tailor specific laminate properties by adjusting nanoplatelet parameters.

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