COOH Functionalized Graphitized MWCNTs (>99.9%, OD: 10-20nm)
Graphitized high purity multi-walled carbon nanotubes (MWNTs) were produced by a low temperature CVD method and subsequently annealed about twenty (20) hours under condition of inert gas at temperatures between 1600 and 3000°C. These products were characterized for chemical purity, interlayer spacing, and defect healing. The graphitization procedure was found to remove residual metal catalyst in the nanotubes and reduce the wall defects as reflected in a reduced interlayer spacing between the graphene shells. The graphitized MWNTs have the highest graphite crystallization, the high electrical conductivity and the excellent inoxidizability. The electrical conductivity of the graphitized MWNTs is very close to that of graphite powder. And its ignition temperature can reach 800°C.
| COOH Functionalized Graphitized MWCNTs | |
| Product No | NRE-40001 |
| CAS No. | NA |
| Formula | NA |
| Purity | Carbon nanotubes > 99.9wt% |
| Average Diameter | 10-20 nm |
| Average Length | 10-30 um (TEM) |
| Special Surface Area(SSA) | >100m2/g(BET) |
| Tap Density | NA |
| True Density | 2.1g/cm3 |
| Electric Conductivity | > 100 S/cm |
COOH Functionalized Graphitized MWCNTs Nanotubes
Introduction
COOH functionalized graphitized MWCNTs nanotubes are cylindrical nanostructures made up of concentric layers of graphene sheets rolled into tubes. These structures possess remarkable properties, including high strength, excellent electrical conductivity, and outstanding thermal stability. Multi-walled carbon nanotubes consist of multiple concentric layers of carbon atoms and can vary in diameter, typically ranging from 1 to 100 nm, with lengths that can exceed several micrometers.
Applications:
Composite Materials:
Polymer Composites: COOH-functionalized MWCNTs are widely used to reinforce polymers, enhancing their mechanical properties, electrical conductivity, and thermal stability. The carboxyl groups facilitate bonding between the MWCNTs and polymer matrices, improving dispersion and interaction.
Ceramic and Metal Composites: MWCNTs can also be incorporated into ceramics or metal matrices to improve their mechanical strength, fracture toughness, and conductivity. COOH groups can help achieve better interfacial bonding between the MWCNTs and the matrix materials.
Energy Storage:
Supercapacitors: Functionalized MWCNTs are often used in the development of supercapacitors and batteries. Their high surface area and conductivity improve charge storage capacity and cycling stability.
Lithium-ion Batteries: COOH-functionalized graphitized MWCNTs are used to enhance the performance of electrodes in lithium-ion batteries, improving both charge/discharge rates and the overall efficiency of the battery.
Fuel Cells: In fuel cell electrodes, COOH-functionalized MWCNTs contribute to improving electrocatalytic activity and enhance the overall performance of fuel cells.
Electronics and Sensors:
Field-Effect Transistors (FETs): Functionalized MWCNTs are used in nanoelectronics, particularly for the fabrication of high-performance transistors, due to their excellent electrical conductivity and compatibility with other materials.
Gas and Chemical Sensors: The functionalized MWCNTs exhibit an increased sensitivity to gases and chemicals due to the presence of the COOH groups, which can interact with target analytes, making them effective in gas sensing and environmental monitoring.
Biosensors: Functionalized MWCNTs are used in biosensors for detecting biological molecules like glucose, DNA, proteins, and other biomarkers. The COOH groups on the nanotubes allow for covalent attachment of biomolecules, improving sensor specificity and sensitivity.
Biomedical Applications:
Drug Delivery: COOH-functionalized graphitized MWCNTs have been studied for their ability to deliver drugs to targeted locations in the body. The functional groups can be used to attach drugs, antibodies, or other therapeutic agents, making MWCNTs a promising platform for targeted drug delivery and therapy.
Gene Delivery: The COOH groups can be used for attaching DNA or RNA molecules for gene delivery applications, facilitating the transport of genetic material into cells.
Imaging and Diagnostics: Functionalized MWCNTs are explored as agents for medical imaging, such as MRI or fluorescence imaging, where they help enhance contrast and allow for better visualization of tissues or specific biological targets.
Pollution Control: Due to their high surface area and reactivity, functionalized MWCNTs can be used to remove organic pollutants from air and water through adsorption processes.
