Facile fabrication of silica–polymer–graphene collaborative nanostructure-based hybrid materials with high conductivity and robust mechanical performance

RSC Advances ◽  
2015 ◽  
Vol 5 (32) ◽  
pp. 25450-25456 ◽  
Author(s):  
Wenqiong Ye ◽  
Ling Zhang ◽  
Chunzhong Li
Keyword(s):  
Thermal Stability ◽  
Graphene Oxide ◽  
Methyl Methacrylate ◽  
Hybrid Materials ◽  
Dispersion Polymerization ◽  
Mechanical Performance ◽  
Electrostatic Assembly ◽  
Reduced Graphene ◽  
Facile Fabrication ◽  
Oxide Composites

SiO2@poly(methyl methacrylate)–reduced graphene oxide composites with outstanding thermal stability, robust mechanical performance and excellent conductivity have been prepared by dispersion polymerization and electrostatic assembly.

Facile fabrication of graphene oxide/poly(styrene-co-methyl methacrylate) nanocomposite with high toughness and thermal stability

2020 ◽  
Vol 25 ◽  
pp. 101633
Author(s):  
Saadman Sakib Rahman ◽  
Muhammad Arshad ◽  
Muhammad Zubair ◽  
Morteza Ghasri-Khouzani ◽  
Ahmed Qureshi ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Graphene Oxide ◽  
Methyl Methacrylate ◽  
High Toughness ◽  
Facile Fabrication

scholarly journals Facile fabrication of nano zerovalent iron – Reduced graphene oxide composites for nitrate reduction in water

2021 ◽  
Vol 3 ◽  
pp. 100024
Author(s):  
J.U. Halpegama ◽  
P.M.C.J. Bandara ◽  
L. Jayarathna ◽  
A. Bandara ◽  
Chen-Yu Yeh ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Nitrate Reduction ◽  
Zerovalent Iron ◽  
Reduced Graphene ◽  
Nano Zerovalent Iron ◽  
Facile Fabrication ◽  
Oxide Composites

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.

Covalent Modified Reduced Graphene Oxide: Facile Fabrication and High Rate Supercapacitor Performances

2020 ◽  
pp. 137700
Author(s):  
Qing Wang ◽  
Haiyan Gao ◽  
Chenzhuo Zhao ◽  
HuiXin Yue ◽  
Guowei Gao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Rate ◽  
Reduced Graphene ◽  
Facile Fabrication

scholarly journals Investigation of Graphene Derivatives on Electrical Properties of Alkali Activated Slag Composites

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4374
Author(s):  
Wu-Jian Long ◽  
Xuanhan Zhang ◽  
Biqin Dong ◽  
Yuan Fang ◽  
Tao-Hua Ye ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrical Properties ◽  
Mechanical Performance ◽  
Structural Defects ◽  
Alkali Activated Slag ◽  
Mechanical And Electrical Properties ◽  
Reduced Graphene ◽  
Graphene Derivatives ◽  
Activated Slag ◽  
Alkali Activated

Reduced graphene oxide (rGO) has been widely used to modify the mechanical performance of alkali activated slag composites (AASC); however, the mechanism is still unclear and the electrical properties of rGO reinforced AASC are unknown. Here, the rheological, mechanical, and electrical properties of the AASC containing rGO nanosheets (0, 0.1, 0.2, and 0.3 wt.%) are investigated. Results showed that rGO nanosheets addition can significantly improve the yield stress, plastic viscosity, thixotropy, and compressive strength of the AASC. The addition of 0.3 wt.% rGO nanosheets increased the stress, viscosity, thixotropy, and strength by 186.77 times, 3.68 times, 15.15 times, and 21.02%, respectively. As for electrical properties, the impedance of the AASC increased when the rGO content was less than 0.2 wt.% but decreased with the increasing dosage. In contrast, the dielectric constant and electrical conductivity of the AASC containing rGO nanosheets decreased and then increased, which can be attributed to the abundant interlayer water and the increasing structural defects as the storage sites for charge carriers, respectively. In addition, the effect of graphene oxide (GO) on the AASC is also studied and the results indicated that the agglomeration of GO nanosheets largely inhibited the application of it in the AASC, even with a small dosage.

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