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Reduced Graphene Oxide Powder

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Product Description

Graphene material produced starting from GO with chemical reduction process to removal the oxygen-containing functional groups, will be called reduced graphene oxide (rGO).

The rGO powder is obtained by vacuum freeze-dried process. In some applications, GO to rGO’s reduction is done during the material composite process.First, using GO's good surface wettability for dispersion, then in-situ reduction is carried out to achieve the composite of different materials. RGO’s surface defect site is relatively lesser than GO and it is more close to single-layer graphene in structure and property.


Technical Specifications

Item

Parameter

Layers

1~5

Tap density (g/cm3)

<0.02

Specific surface area (m2/g)

350~450

Carbon content (%)

85~90

Oxygen content (%)

8~13

Particle size( D50=μm)

<5μm

State

Powder

Preparation method

Chemical reduction process

Raw material

Natural flake graphite

Product Specification

5g/bottle


Product Advantages

  • Different reduction processes will cause different reduction degrees.According to different applications, different reducing agents will be used to reduce graphene oxide.

  • rGO powder still keep a little oxygen-containing functional groups,the properties are more active then graphene produced by physical method, will be more easier to graft modification then composite with other materials.

  • As an adsorption material, rGO powder keep a little oxygen-containing functional groups, the adsorption of heavy metals and organic dyes has a very obvious effect.

  • Using vacuum freeze-drying, higher yield than spray-drying, and the form remains intact.

  • High purity, less metal impurities.


Product details


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rGO powder

 

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Transmission electron microscope picture of rGO powder

 

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Infrared spectrogram picture of graphite,GO and rGO

 

 

Project Case (Before vs After)

The material’s hydrophobic performance can be improved effectively


Project-Case-1.jpg

The common sponge


Project-Case-2.jpg

Graphene modified sponge

 

 

Applicable fields

Textile field: Graphene materials and ordinary textiles’s effective combination, can make the textile retain their own performance ,meanwhile access to graphene’s one or several special properties, such as conductive, flame-retardant, antibacterial, anti-ultraviolet ray, anti-electromagnetic radiation, magnetic therapy, anionic health care, etc., can be applied in the field of special protection, smart fabrics and so on;


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Graphene photocatalytic materials: Graphene/titanium dioxide photocatalytic materials in the visible light or ultraviolet light has a strong reducing ability, stable chemical properties, can be formaldehyde, toluene, xylene, ammonia, odor, bacteria, microorganisms, and other harmful organic matter completely decomposed into carbon dioxide and water. Graphene/titanium dioxide photocatalytic material can be applied to various photocatalytic sprays for air pollution treatment, such as applied to indoor air purification, formaldehyde removal, outdoor environment air purification, etc.; nano antimicrobial coatings; wastewater treatment, such as decomposition of organic matter in wastewater from paper mills, dyeing and printing factories, and chemical plants. The application prospect is broad.


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Construction materials: Graphene construction materials are formed by using graphene as the core and compositing with other materials through its high strength and strain hardening properties. The characteristics of graphene flakes can be utilized to strengthen the thermal conductivity and strength of the material, while effectively reducing the density of the material. Usually in the concrete material to increase a strength level, a single square of concrete need to increase 30kg cement, if mixed with graphene, then to achieve the same strength level, can save cement about 10%. The advantages are high strength, good thermal conductivity, good emissivity and oxidation resistance.In 2018, a hospital in London, UK, applied a roof built with graphene material. This roof utilizes special 3D printing and steel structure, and through the high thermal conductivity of graphene material, the temperature inside the hospital will be drastically reduced in the summer, saving the hospital's air conditioning energy consumption.


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Graphene anti-corrosion coatings: Graphene material in the sheet diameter is very small can still maintain a great diameter-thickness ratio, add a small amount of graphene in the coating on the line to effectively form a lap, the formation of a more complete shielding layer, delay the penetration of corrosive media, greatly reducing the permeability of chloride ions.According to graphene's high conductivity, add a very small amount of zinc powder coating (<0.3%), the coating and zinc powder can form a conductive network, improve the utilization of zinc powder, so that the entire coating relative to the steel to become the "anode", and significantly improve the cathodic protection performance of the zinc powder primer.


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Graphene lubricant: Traditional lubricant additives usually contain sulfur, phosphorus, chlorine and other elements, to bring greater harm to the environment, in order to create a green and efficient lubricant products, graphene has become the ideal choice, graphene lubrication and anti-wear performance is very excellent, when the number of layers of 2 ~ 3 layers, its friction is not zero but almost zero. Graphene lubricant can change the friction between the metal rotating parts into sliding between the layers of graphene sheets, and at the same time, it can also fill and repair the uneven pits on the metal surface to meet the dual needs of anti-wear and drag reduction, and prolong the service life of the engine. At the same time, based on graphene's antioxidant and anti-volatility, graphene lubricant can also save fuel and reduce carbon emissions, which is conducive to environmental protection. Currently several categories of graphene materials can achieve the effect of lubrication, but considering the problem of dispersion, the dispersion of graphene oxide is more advantageous.


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The field of health: Graphene inherent properties determine that it can produce a wavelength of 5 ~ 15μm range of far-infrared radiation energy, and 4 ~ 15μm of far-infrared light is essential for the survival of plants and animals, "the light of life", biological tissues, cells and molecules of the chemical bond vibration, resonance wavelengths are located in most of the 4 ~ 15μm wavelength band. Most of the resonance wavelengths are located in the 4~15μm band when the chemical bonding of biological tissues and cells vibrate, which is basically coincident with the far infrared rays radiated by graphene, thus producing "resonance absorption". Far infrared rays have a strong penetrating ability, not only to the surface of the object, but also can be transported to the object inside the heat, absorbed by the human body can penetrate the skin 3 ~ 5nm, is the temperature of the deep skin rises, to promote blood circulation, and play a role in health care.


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Masterbatch manufacturing industry: Graphene and its graphene oxide doping can change the physical and mechanical properties of polymers, graphene masterbatch as an additive can effectively change the tension, deformation and impact resistance of plastics, and enhance the resistance to ultraviolet rays. The incorporation and concentration of graphene and its derivatives can change the physical and mechanical properties of the polymer to be processed. Addition of the masterbatch to different polymers more or less improves the final properties of the material, for example:


  • Polypropylene (PP) with polypropylene-graphene masterbatch (MB-PP/GO) incorporation improves tensile strength (8%) and fracture rate (29%).

  • Additive for polyethylene (PE) with polyethylene-graphene masterbatch (MB-PE/GO) improves tensile strength (17%), flexural strength and breaking strength (66%).

  • Additives to polyethylene terephthalate (PET) with polyethylene terephthalate-graphene masterbatch (MB-PET/GO) improve moisture resistance, increase tensile strength (72.2%) and improve impact resistance.

  • Additive for polycarbonate (PC) with polycarbonate-graphene masterbatch (MB-PC/GO) improves moisture resistance and increases rupture resistance (276%).


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