scholarly journals Removal of Surfactant from Nanocomposites Films Based on Thermally Reduced Graphene Oxide and Natural Rubber

2019 ◽  
Vol 3 (2) ◽  
pp. 31 ◽  
Author(s):  
Hector Aguilar-Bolados ◽  
Ahirton Contreras-Cid ◽  
Andronico Neira-Carrillo ◽  
Miguel Lopez-Manchado ◽  
Mehrdad Yazdani-Pedram
Keyword(s):  
Graphene Oxide ◽  
Natural Rubber ◽  
Reduced Graphene Oxide ◽  
Aqueous Suspension ◽  
Sodium Dodecyl ◽  
Mechanical Analysis ◽  
Electrically Conducting ◽  
Washing Process ◽  
Reduced Graphene ◽  
Elastomer Composites

Electrically conducting elastomer composites based on natural rubber and reduced graphene oxide (rGO) is reported. These composites were prepared by a latex method and an easy washing process. The latex method consists of the mixing of an aqueous suspension of rGO, stabilized by sodium dodecyl sulfate and pre-vulcanized natural rubber, followed by solvent casting. The percolation threshold of composites was estimated at 1.54 wt.% of rGO. The washing process allowed elimination of the surfactant completely from nanocomposites. The absence of surfactant in nanocomposites was demonstrated by Raman spectroscopy and dynamo-mechanical analysis. The surfactant-free nanocomposites showed improved mechanical and electrical properties.

Stable Reduced Graphene Oxide Suspension Modified by PAMAM

2013 ◽  
Vol 341-342 ◽  
pp. 213-216
Author(s):  
Yong Qiang He ◽  
Fei Wu ◽  
Di Wu ◽  
Yong Li Zhang ◽  
Jian Ping Gao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Aqueous Suspension ◽  
Pamam Dendrimers ◽  
Graphene Oxide Nanosheets ◽  
Amino Terminal ◽  
Reduced Graphene

Poly (amidoanime) (PAMAM) dendrimers contain numerous amino-terminal groups and are highly hydrophilic. These terminal groups make PAMAM molecules adsorbed onto graphene oxide (GO) nanosheets through electrostatic action with oxygen containing groups on graphene oxide nanosheets. The PAMAM molecules react with GO, and form stable aqueous suspension of modified reduced graphene oxide (RGO).

scholarly journals Constructing a Segregated Magnetic Graphene Network in Rubber Composites for Integrating Electromagnetic Interference Shielding Stability and Multi-Sensing Performance

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3277
Author(s):  
Jian Wang ◽  
Baohua Liu ◽  
Yu Cheng ◽  
Zhenwan Ma ◽  
Yanhu Zhan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Natural Rubber ◽  
Reduced Graphene Oxide ◽  
Electromagnetic Interference ◽  
Electromagnetic Interference Shielding ◽  
Cyclic Stretching ◽  
Reduced Graphene ◽  
Wearable Electronic ◽  
Emi Se ◽  
Sensing Performance

A flexible, wearable electronic device composed of magnetic iron oxide (Fe3O4)/reduced graphene oxide/natural rubber (MGNR) composites with a segregated network was prepared by electrostatic self-assembly, latex mixing, and in situ reduction. The segregated network offers the composites higher electrical conductivity and more reliable sensing properties. Moreover, the addi-tion of Fe3O4 provides the composites with better electromagnetic interference shielding effectiveness (EMI SE). The EMI shielding property of MGNR composites is more stable under tensile deformation and long-term cycling conditions and has a higher sensitivity to stretch strain compared with the same structure made from reduced graphene oxide/natural rubber (GNR) composites. The EMI SE value of MGNR composites reduces by no more than 2.9% under different tensile permanent deformation, cyclic stretching, and cyclic bending conditions, while that of GNR composites reduces by approximately 16% in the worst case. Additionally, the MGNR composites have a better sensing performance and can maintain stable signals, even in the case of cyclic stretching with a very small strain (0.05%). Furthermore, they can steadily monitor the changes in resistance signals in various human motions such as finger bending, wrist bending, speaking, smiling, and blinking, indicating that the MGNR composites can be used in future wearable electronic flexibility devices.

scholarly journals Synthesis of diamine functionalised graphene oxide and its application in the fabrication of electrically conducting reduced graphene oxide/polymer nanocomposite films

2020 ◽  
Vol 2 (10) ◽  
pp. 4702-4712
Author(s):  
Namrata Maslekar ◽  
Rabiatul A. Mat Noor ◽  
Rhiannon P. Kuchel ◽  
Yin Yao ◽  
Per B. Zetterlund ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrical Properties ◽  
Reduced Graphene Oxide ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Electrically Conducting ◽  
Free Amine ◽  
Reduced Graphene ◽  
Amine Groups

The study focussed on synthesis of colloidally stable diamine functionalised graphene oxide (GO) with dangling free amine groups, and exhibited physicochemical and electrical properties of these functionalised sheets in a polymer-based nanocomposite.

scholarly journals Preparation and Comparison of Reduced Graphene Oxide and Carbon Nanotubes as Fillers in Conductive Natural Rubber for Flexible Electronics

ACS Omega ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 3458-3468 ◽  
Author(s):  
Antonio Capezza ◽  
Richard L. Andersson ◽  
Valter Ström ◽  
Qiong Wu ◽  
Benedetta Sacchi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Natural Rubber ◽  
Reduced Graphene Oxide ◽  
Flexible Electronics ◽  
Reduced Graphene

scholarly journals Significant Fatigue Life Enhancement in Multiscale Doubly-Modified Fiber/Epoxy Nanocomposites with Graphene Nanoplatelets and Reduced-Graphene Oxide

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2135
Author(s):  
Mohammad Rafiee ◽  
Somayeh Hosseini Rad ◽  
Fred Nitzsche ◽  
Jeremy Laliberte ◽  
Michel R. Labrosse
Keyword(s):  
Graphene Oxide ◽  
Fatigue Life ◽  
Reduced Graphene Oxide ◽  
Composite Laminates ◽  
Fatigue Behavior ◽  
Cost Effective ◽  
Mechanical Analysis ◽  
Graphene Nanoplatelets ◽  
Experimental Results ◽  
Reduced Graphene

We report the fatigue behavior of a novel multiscale fiberglass/epoxy composite modified with reduced-graphene oxide (rGO) and graphene nanoplatelets (GNP). A novel and cost-effective fabrication method based on vacuum assisted resin transfer molding (VARTM) method was used for manufacturing the composite laminates. Morphological and mechanical analysis of composites showed a successful dispersion of nano-fillers and a remarkable improvement in fatigue life of the nanocomposites. The experimental results revealed that all rGO concentrations resulted in a significant increase in fatigue life of the nanocomposites. These enhancements can be explained by the creation of stronger links between the nanoparticles fiberglass and epoxy. The experimental results also showed that lower concentrations of GNPs lead to an increase in fatigue life of nanocomposites; however, a decrease in their fatigue life can be seen at higher loadings.

Structure and Properties of Reduced Graphene Oxide/Natural Rubber Latex Nanocomposites

2017 ◽  
Vol 17 (2) ◽  
pp. 1133-1139 ◽  
Author(s):  
Chaoqun Li ◽  
Jiang Wang ◽  
Xin Chen ◽  
Yingze Song ◽  
Kangjia Jiang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Natural Rubber ◽  
Reduced Graphene Oxide ◽  
Natural Rubber Latex ◽  
Structure And Properties ◽  
Rubber Latex ◽  
Reduced Graphene

Preparation and Characterization of Reduced Graphene Oxide Based Natural Rubber Nanocomposites

2020 ◽  
Vol 35 (5) ◽  
pp. 493-502
Author(s):  
F. Shahamatifard ◽  
D. Rodrigue ◽  
K. Park ◽  
S. Frikha ◽  
F. Mighri
Keyword(s):  
Graphene Oxide ◽  
Natural Rubber ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene ◽  
Rubber Nanocomposites
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