scholarly journals Dispersibility of different sized graphene oxide sheets and their reinforcement on polyamide 6 fibers

RSC Advances ◽  
2017 ◽  
Vol 7 (89) ◽  
pp. 56682-56690 ◽  
Author(s):  
Shiyu Zhang ◽  
Yao Cheng ◽  
Weijuan Xu ◽  
Juan Li ◽  
Jun Sun ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Strong Interaction ◽  
Polyamide 6 ◽  
Nanocomposite Fibers ◽  
Graphene Oxide Sheets

PA6/grafted-SGO (g-SGO) nanocomposite fibers show improved mechanical-properties due to excellent dispersibility of g-SGO and strong interaction between g-SGO and PA6.

The effect of large area graphene oxide (LAGO) nanosheets on the mechanical properties of polyvinyl alcohol

2016 ◽  
Vol 36 (4) ◽  
pp. 399-405 ◽  
Author(s):  
Khalid Nawaz ◽  
Muhammad Ayub ◽  
Noaman Ul-Haq ◽  
M.B. Khan ◽  
Muhammad Bilal Khan Niazi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Molecular Level ◽  
Large Area ◽  
Graphene Oxides ◽  
Elongation At Break ◽  
Graphene Oxide Sheets ◽  
Excellent Improvement

Abstract Large area graphene oxide sheets were synthesized, dispersed in water and used as nanofiller for mechanical improvement in terms of Young’s modulus and ultimate tensile strength (UTS) of polyvinyl alcohol (PVA) at low loading. The molecular level dispersion and interfacial interactions between the graphene oxides and polymeric matrix PVA were the real challenges. An excellent improvement in mechanical properties at 0.35 wt% loading was observed. Modulus improved from 1.58 GPa to 2.72 GPa (~71% improvement), UTS improved from 120 MPa to 197 MPa (~65% improvement), and in spite of these improvements, interestingly, there was no fall in elongation at break at this loading.

scholarly journals Design of graphene oxide/gelatin electrospun nanocomposite fibers for tissue engineering applications

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 109150-109156 ◽  
Author(s):  
Sakthivel Nagarajan ◽  
Céline Pochat-Bohatier ◽  
Catherine Teyssier ◽  
Sébastien Balme ◽  
Philippe Miele ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Graphene Oxide ◽  
Cell Viability ◽  
Significant Influence ◽  
Cell Attachment ◽  
Electrospun Fibers ◽  
Engineering Applications ◽  
Nanocomposite Fibers

2D graphene oxide (GO) is used to enhance the mechanical properties of gelatin electrospun fibers. The GO does not show any significant influence on cell viability and cell attachment even though the expression of osteoblast gene is affected.

A reactive molecular dynamics study of graphene oxide sheets in different saturated states: structure, reactivity and mechanical properties

2018 ◽  
Vol 20 (16) ◽  
pp. 11053-11066 ◽  
Author(s):  
Dongshuai Hou ◽  
Tiejun Yang
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Hydrogen Bonding ◽  
Graphene Oxide ◽  
Reactive Molecular Dynamics ◽  
Graphene Oxide Sheets

Heterogeneous hydrogen bonding determines the mechanical properties of GO sheets.

Physical, mechanical, chemical and thermal properties of nanoscale graphene oxide-poly methylmethacrylate composites

2018 ◽  
Vol 52 (20) ◽  
pp. 2803-2813 ◽  
Author(s):  
Aftab A Khan ◽  
Eraj H Mirza ◽  
Badreldin A Mohamed ◽  
Nabeel H Alharthi ◽  
Hany S Abdo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Wear Resistance ◽  
Graphene Oxide ◽  
Bone Cement ◽  
Bending Strength ◽  
Resin Matrix ◽  
Graphene Oxide Sheets ◽  
Scanning Electron

The purpose of this laboratory study was to formulate and characterize the graphene oxide-poly(methyl methacrylate) resin composite with an intended use as bone cement. Graphene oxide was fabricated through ultrasonication route. The autopolymerization resin (Eco Cryl Cold, Protechno, Vilamalla Girona, Spain) was used to prepare the specimens of required dimensions for different testing parameters. The control group (C-group) was prepared as such. However, for GO1-group, 0.024 wt/wt.-% of graphene oxide was incorporated in a resin matrix and GO2-group was a composite with 0.048 wt/wt.-% of graphene oxide in a resin matrix. TEM examination of graphene oxide sheets demonstrated them in the range of ∼500 nm to ∼2 µm. The mechanical properties were characterized using three-point bending and wear resistance, while material properties were assessed through transmission electron microscope, scanning electron microscopy, Fourier-transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, differential scanning calorimetry and thermo-gravimetric analysis. The results suggest that 0.024 wt/wt.-% and 0.048 wt/wt.-% of loading of GO have no effect on the physiochemical characteristics. However, thermal characteristics might slightly be improved. According to the analysis of variance results ( p < 0.05, n = 5), wear resistance and bending strength of both GO1 and GO2 groups significantly improved compared to C-group. The bending strength of GO2 improved to 87.0 ± 7.2 MPa from 65.9 ± 11.5 MPa of C-group. Scanning electron microscopy examination of the fractured surface demonstrated granule like structure where the graphene oxide sheets might be covered inside PMMA. The use of GO-PMMA composites favorably enhances the mechanical properties of bone cement.

Sign in / Sign up

Export Citation Format

Share Document