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JSC ZAVKOM is the first enterprise in the Russian Federation that has developed industrial production of multi-walled carbon nanotubes as well as materials based on graphene and related structures.

Description

Carbon nanotubes and graphene discovered in 90s of 20th century and in the first decade of 21st century are unique structures with amazing properties: high strength, combined with record-setting electrical and thermal conductivity, the ability to absorb and retain various pollutants, etc.

Carbon nanotubes are quasi-one-dimensional, nanoscale, filamentary formations of polycrystalline graphite of a cylindrical shape with an internal channel.

Graphene and graphene nanoplates are two-dimensional structures consisting of two or more layers of carbon atoms with thickness up to 5 nanometers.

As of today our enterprise has mastered not only production of multi-walled carbon nanotubes and graphene nanoplates, but also a wide variety of its functionalized forms adapted to specific applications. Company also develops, manufactures and sells pilot equipment for implementation of processes for synthesis of carbon nanostructures. For instance, in 2008 - 2010 reactors for synthesis of carbon nanotubes were supplied to Japan, Czech Republic, Germany and Ukraine.

Quality and safety of nanotechnological products manufactured by JSC ZAVKOM is confirmed by certificates of Nanocertification system, and CNTs of Taunit series and Taunit-GM graphene nanoplates are marked with Russian nanotechnological products sign.

JSC ZAVKOM manufactures the following types of nanotechnological products:

Taunit series multi-walled carbon nanotubes

Characteristics	Taunit	Taunit-M	Taunit-MD	Taunit-4
External diameter, nanometers	20-50	10-30	8-30	4-8
Internal diameter, nanometers	10-20	5-15	5-15	1-2
Length, micrometers	≥2	≥2	≥20	≥100
Total number of impurities, % Total After purification	≤10 ≤1	≤5 ≤1	≤5 ≤1	≤5 ≤1
Specific surface area, m²/g	≥90	≥270	≥270	650
Bulk density, g/cm³	0.3-0.6	0.025-0.06	0.025-0.06	0,03-0,05
Thermal stability, °С	up to 600	up to 600	up to 600	up to 600

Taunit-GM graphene nanoplates

Parameter

Taunit-GM (Multi-layer)

Taunit-GM (Minimal number of layers)

Number of graphene layers

15 - 25

3 - 5

Nanoplate thickness, nanometers

6 - 8

1 - 3

Nanoplate size in the plain view, micrometers

2 - 10

Nanoplate content, % of mass

4 - 7

12 - 16

Oxygen content in relation to carbon, % of mass

9 - 13

Sulfur content, % of mass.

≤0,7

Specific absorption coefficient, L/(g·cm)

30 - 33

58 - 63

Graphene oxide (GO) - graphene particles with oxygen-containing functional groups attached at the edges and inside the carbon network.

Commercial forms of GO are as follows:

water dispersion with an air-dry GO content equal to 1%; dry GO in the form of films; freeze-dried GO airgel. Commercial forms of modified types of GO are dispersions, pastes and aerogels.

Properties of graphene oxide: thick liquid of dark brown color, pH - 4-6, with no odor, lateral particle size: 1-10 microns, content of mineral impurities is 0.3% of dry matter. Dispersions are stable in pure water, coagulate in the presence of electrolytes.

Micro- and mesoporous carbon nanostructures

Carbon materials with a developed surface and pore size in the range from micro to mesopores for creating effective adsorbents and electrode materials for chemical current sources.

Parameters of some of the materials produced:

Characteristics	Brand A	Brand B
Surface area (BET) m²/g	2400-2600	1600-2400
Pore size (range, DFT), nanometers	1-10	1-16
Specific pore volume (DFT), cm³/g	2,0-2,2	1,6-2,0
Content of carbon nanotubes, % of mass	15-20	25-35

Products based on multi-walled carbon nanotubes:

- carboxylated carbon nanotubes (CCNT) (0.1-1.0 mmol / g COOH - groups);

- oleophilic carbon nanotubes modified with fatty acid residues (titanium stearate) (Ti-CNT) (modified with fatty acid residues, up to 15 mass %);

- hydrophilic carbon nanotubes (HFCNT) (soluble in water (up to 0.2%), in dimethylacetamide (up to 0.5%));

- nanotubes coated with polyaniline (polyaniline content 20-90 mass %) (PANI-CNT);

- superconcentrate of carbon nanotubes in epoxy and / or phenol-formaldehyde resins (EF-CNT), content of nanotubes is up to 10% of the mass.

- superconcentrate of carbon nanotubes in polyethylene (PE-CNT), content of nanotubes is up to 10% of the mass.

- superconcentrate of carbon nanotubes in polypropylene (PP-CNT), content of nanotubes is up to 10% of the mass.

- superconcentrate of carbon nanotubes in polyamide (PA-CNT), content of nanotubes is up to 10% of the mass.

- amidated carbon nanotubes (0.1-0.6 mmol / g CONH2 - groups).

JSC ZAVKOM offers services for development and manufacturing of non-standard formulations of products based on various forms of carbon nanomaterials according to the customer's specifications, as well as development of technology and hardware implementation of processes for obtaining such products.