graphene nanoplatelets (by physical method)

Product Description:

graphene nanoplatelets (by physical method)

The graphene nanoplatelets produced starting from natural flake graphite with physical stripping process to get graphene slurry, then with vacuum freeze-dried process to get the powder,with the advantages of high purity, large specific surface area and high stability.The graphene nanoplatelets stripped by physical method have no oxidation process of strong oxidants, no lattice defects introduced, with excellent electrical conductivity.

Product advantages：

1.with high quality,no lattice defects introduce

2.Low impurity content: fully control of metal impurity content to meet customers' high purity requirement;

3.Good electrical conductivity: graphene nanoplatelets prepared by physical method has fewer defects, with excellent electrical and thermal conductivity

4.Using vacuum freeze-drying,the powder has good redispersibility

Technical Specification:

Product name: graphene nanoplatelets (by physical method)

Product Mode:SY-GNP-S

Brand：SmartCmeta

Abbreviation: GNP

Preparation method: by physical method

Raw material: natural flake graphite

Product Specification: 5g/bottle

Place of origin: Beijing, Xiamen

Price：Cheaper in a bulk order

Customization：Customization is acceptable

Areas of application：

1.Graphene-based battery: Using graphene as a lithium-ion battery conductive agent can build a conductive network that is "soft, thin and dense", greatly reducing the amount of conductive agent, significantly improving the volume energy density and charge and discharge performance of the battery, which means that more energy can be stored in the same space, improving the endurance of mobile phones and electric vehicles.

2.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;

3.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.

4.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.On the other hand, the use of 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.

5.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.

6.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.

Frequently Asked Questions

Q: What types of graphene materials are there?

A: According to the different preparation processes, graphene materials can be divided into two categories: graphene oxide and graphene, and graphene can be divided into graphene nanoplatelets prepared by physical method, usually denoted by GNP, and reduced graphene oxide prepared by chemical reduction process, usually denoted by rGO, according to the different preparation processes.

Q: What are the different conditions of use for these three types of graphene products?

A: GO has better hydrophilicity and can be stably dispersed in water without adding any additives, but some lattice defects are introduced in the process of oxidative intercalation, so GO is almost non-conductive; GNP has a complete lattice and better electrical conductivity, but GNP is highly hydrophobic and extremely difficult to be dispersed without dispersing additives and the number of layers is higher than that of graphene oxide.The conductivity and dispersibility of rGO is between GO and GNP, and it is necessary to add appropriate amount of dispersing additives in the process of using.

Q:How to disperse the graphene powder?

A:Through simple ultrasonic treatment, the graphene powder can be dispersed in agents such as water, ethanol, acetic acid, DMF, NMP, etc

Q:How to do if graphene powder dispersion effect is not so good?

A:A small amount of sodium cholate surfactant can be added to the dispersion system to reduce the surface tension of graphene and enhance its dispersion effect

Q:How to store graphene powder?

A: It is recommended to keep it in ventilated, cool and dry environment, and store it separately from strong oxidizers and flammable materials. Long time storage will lead to powder absorb moisture easily, which can be dried in low temperature before use.

Q: What is the particle size of graphene?

A: At present, the particle size of our rGO with chemical reduction process is less than 5μm, the physical method produced graphene nanoplatelet is 7~12μm , please contact us for customization if you need other size.