scholarly journals Electrical Properties of Textiles Treated with Graphene Oxide Suspension

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1999
Author(s):  
Danil Valeriyevich Nikolaev ◽  
Zakhar Ivanovich Evseev ◽  
Svetlana Afanasyevna Smagulova ◽  
Irina Veniaminovna Antonova
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Vital Signs ◽  
Protective Layer ◽  
Adhesive Layer ◽  
Oxide Coating ◽  
Electronic Textiles ◽  
Reduced Graphene ◽  
Measure Heart Rate ◽  
Mechanical Bending

Two-dimensional nanomaterials such as graphene can provide various functional properties to textiles, which have great potential in sportswear, healthcare etc. In this study, the properties of nylon and cotton-based electronic textiles coated with reduced graphene oxide are investigated. After reduction of graphene oxide coating in hydrazine vapor, e-textiles with a resistance of ~350 Ω/sq for nylon, and ~1 kΩ/sq for cotton were obtained. Cyclic mechanical bending tests of samples showed that the resistance increases during bending up to 10–20%. The use of bovine serum albumin as an adhesive layer improved the wash stability for samples with nylon up to 40 washing cycles. The use of BF-6 glue as a protective layer reduced changes in resistance during bending, and improved wash stability of cotton samples. It was shown that the resistance of the obtained samples is sensitive to changes in temperature and humidity. In addition, obtained e-textiles attached to a person’s wrist were able to measure heart rate. Thus, the obtained electronic textiles based on cotton and nylon coated with reduced graphene oxide demonstrates good characteristics for use as sensors for monitoring vital signs.

scholarly journals Tribological Performance Investigation of a Commercial Engine Oil Incorporating Reduced Graphene Oxide as Additive

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 386
Author(s):  
Hakan Kaleli ◽  
Selman Demirtaş ◽  
Veli Uysal ◽  
Ioannis Karnis ◽  
Minas M. Stylianakis ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Tribological Behavior ◽  
Control Sample ◽  
Protective Layer ◽  
Steel Ball ◽  
Carbon Accumulation ◽  
Engine Oil ◽  
Wear Scar Diameter ◽  
Reduced Graphene

We investigated the tribological behavior of commercialized, fully synthetic engine oil upon the incorporation of reduced graphene oxide in seven different concentrations between 0.01 and 0.2 wt %. Stability of the prepared samples was assessed by turbidimetry and dynamic light scattering measurements, and their tribological properties through a reciprocating tribometer, using a steel ball on special cut steel blocks. The addition of 0.02 wt % of reduced graphene oxide led to an improvement of the tribological behavior compared to the pristine engine oil, by significantly lowering the friction coefficient by 5% in the boundary lubrication regime. Both the surfaces and the reduced graphene oxide additive were thoroughly characterized by microscopic and optical spectroscopy techniques. We also verified that a protective layer was formed between the worn surfaces, due to the presence of reduced graphene oxide. Carbon accumulation and various additive elements such as Ca, Zn, S and P were detected on the rubbing surfaces of both the ball and the block through energy-dispersive X-ray spectroscopy. Finally, it was shown that the wear scar diameter on the surface of the steel ball was lower by 3%, upon testing the engine oil sample containing reduced graphene oxide at concentration 0.02 wt %, compared to the control sample.

Enhanced cycleability of faradic CoNi2S4 electrode by reduced graphene oxide coating for efficient asymmetric supercapacitor

2018 ◽  
Vol 281 ◽  
pp. 394-404 ◽  
Author(s):  
Zhiyong Gao ◽  
Chen Chen ◽  
Jiuli Chang ◽  
Liming Chen ◽  
Panyue Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Oxide Coating ◽  
Asymmetric Supercapacitor ◽  
Reduced Graphene

Reduced graphene oxide as a protective layer of the current collector of a lithium-ion battery

2017 ◽  
Vol 53 (6) ◽  
pp. 622-626
Author(s):  
D. Yu. Kornilov ◽  
S. P. Gubin ◽  
P. N. Chuprov ◽  
A. Yu. Rychagov ◽  
A. V. Cheglakov ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Battery ◽  
Reduced Graphene Oxide ◽  
Protective Layer ◽  
Lithium Ion ◽  
Current Collector ◽  
Reduced Graphene

High-rate lithium–sulfur batteries promoted by reduced graphene oxide coating

2012 ◽  
Vol 48 (34) ◽  
pp. 4106 ◽  
Author(s):  
Nianwu Li ◽  
Mingbo Zheng ◽  
Hongling Lu ◽  
Zibo Hu ◽  
Chenfei Shen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Oxide Coating ◽  
High Rate ◽  
Reduced Graphene ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

Selective release of less defective graphene during sliding of an incompletely reduced graphene oxide coating on steel

Carbon ◽  
2018 ◽  
Vol 134 ◽  
pp. 411-422 ◽  
Author(s):  
Shusheng Xu ◽  
Yuzhen Liu ◽  
Mingyu Gao ◽  
Kyeong-Hee Kang ◽  
Chang-Lae Kim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Oxide Coating ◽  
Reduced Graphene ◽  
Defective Graphene
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