Temperature dependent electron transport behavior of poly (methyl methacrylate)/silver functionalized reduced graphene oxide films

2018 ◽  
Author(s):  
S. Asha ◽  
A. Nimrodh Ananth ◽  
G. Vanitha Kumari ◽  
G. S. Okram ◽  
Sujin P. Jose ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electron Transport ◽  
Methyl Methacrylate ◽  
Reduced Graphene Oxide ◽  
Oxide Films ◽  
Temperature Dependent ◽  
Poly Methyl Methacrylate ◽  
Transport Behavior ◽  
Reduced Graphene

scholarly journals Influence of HRGO Nanoplatelets on Behaviour and Processing of PMMA Bone Cement for Surgery

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2027
Author(s):  
Jaime Orellana ◽  
Ynés Yohana Pastor ◽  
Fernando Calle ◽  
José Ygnacio Pastor
Keyword(s):  
Graphene Oxide ◽  
Methyl Methacrylate ◽  
Bone Cement ◽  
Reduced Graphene Oxide ◽  
Sintering Temperature ◽  
Structural Function ◽  
Mechanical And Thermal Properties ◽  
Poly Methyl Methacrylate ◽  
Pmma Bone Cement ◽  
Reduced Graphene

Bone cement, frequently based on poly (methyl methacrylate), is commonly used in different arthroplasty surgical procedures and its use is essential for prosthesis fixation. However, its manufacturing process reaches high temperatures (up to 120 °C), producing necrosis in the patients' surrounding tissues. To help avoid this problem, the addition of graphene could delay the polymerisation of the methyl methacrylate as it could, simultaneously, favour the optimisation of the composite material's properties. In this work, we address the effect of different percentages of highly reduced graphene oxide with different wt.% (0.10, 0.50, and 1.00) and surface densities (150, 300, 500, and 750 m2/g) on the physical, mechanical, and thermal properties of commercial poly (methyl methacrylate)-based bone cement and its processing. It was noted that a lower sintering temperature was achieved with this addition, making it less harmful to use in surgery and reducing its adverse effects. In contrast, the variation of the density of the materials did not introduce significant changes, which indicates that the addition of highly reduced graphene oxide would not significantly increase bone porosity. Lastly, the mechanical properties (strength, elastic modulus, and fracture toughness) were reduced by almost 20%. Nevertheless, their typical values are high enough that these new materials could still fulfil their structural function. In conclusion, this paper presents a way to control the sintering temperature, without significant degradation of the mechanical performance, by adding highly reduced graphene oxide so that local necrosis of bone cement based on poly (methyl methacrylate) used in surgery is avoided.

Electrical annealing and temperature dependent transversal conduction in multilayer reduced graphene oxide films for solid-state molecular devices

2012 ◽  
Vol 14 (41) ◽  
pp. 14277 ◽  
Author(s):  
Jonas Rahlf Hauptmann ◽  
Tao Li ◽  
Søren Petersen ◽  
Jesper Nygård ◽  
Per Hedegård ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solid State ◽  
Reduced Graphene Oxide ◽  
Oxide Films ◽  
Molecular Devices ◽  
Temperature Dependent ◽  
Reduced Graphene

Reduced Graphene Oxide (rGO) Prepared by Metal‐Induced Reduction of Graphite Oxide: Improved Conductive Behavior of a Poly(methyl methacrylate) (PMMA)/rGO Composite

2019 ◽  
Vol 4 (27) ◽  
pp. 7954-7958 ◽  
Author(s):  
Abul K. Mallik ◽  
Md. Lawshan Habib ◽  
Fataha N. Robel ◽  
Md. Shahruzzaman ◽  
Papia Haque ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Methyl Methacrylate ◽  
Reduced Graphene Oxide ◽  
Graphite Oxide ◽  
Poly Methyl Methacrylate ◽  
Reduced Graphene
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