OH Functionalized Graphitized MWNTs (>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.
| OH Functionalized Graphitized MWNTs | |
| Product No | NRE-40007 |
| CAS No. | 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 |
OH Functionalized Graphitized MWNTs
OH Functionalized Graphitized MWNTs are a special class of carbon nanotubes that have undergone graphitization and subsequent functionalization with hydroxyl groups (-OH). These functionalized MWNTs are an advancement of graphitized MWNTs, where the high-temperature graphitization process improves the alignment of graphene layers, enhancing their electrical conductivity, mechanical strength, and thermal stability.
Applications
Composite Materials
Polymer Nanocomposites: OH-functionalized MWNTs can be used as reinforcement in polymer matrices. The hydroxyl groups help improve the dispersion of MWNTs in the polymer, resulting in enhanced mechanical properties (e.g., strength, stiffness), thermal conductivity, and electrical conductivity. Applications include:
Aerospace and automotive: Components that require lightweight, high-strength materials, such as vehicle body parts, aircraft structures, and components in high-performance vehicles.
Sports equipment: Reinforced materials for tennis rackets, golf clubs, and bike frames that require high durability and strength-to-weight ratios.
Electrical and thermal management: Polymers used in thermal interface materials (TIMs), heat sinks, and electrically conductive adhesives for electronics.
Epoxy and Resin Composites: The hydroxyl groups enable MWNTs to bond more effectively with epoxy resins and other thermosetting polymers, improving the adhesion and overall performance of the composite material.
Energy Storage and Conversion
Supercapacitors: The hydroxyl groups on graphitized MWNTs enhance the electrochemical properties of supercapacitors by increasing the surface area and providing more active sites for ion adsorption. This results in:
Increased energy density and faster charge/discharge cycles.
Applications in electric vehicles (EVs), renewable energy systems, and consumer electronics.
Lithium-Ion Batteries: OH-functionalized MWNTs can be used as anode or cathode materials in lithium-ion batteries to improve charge capacity, cycling stability, and rate capability. The enhanced dispersion of MWNTs in the electrolyte and their improved conductivity make them ideal for:
Portable electronics (e.g., smartphones, laptops).
Fuel Cells: OH-functionalized MWNTs can be used as electrocatalyst supports in proton exchange membrane fuel cells (PEMFCs). The hydroxyl groups enhance the interaction between the MWNTs and catalyst nanoparticles, leading to improved catalytic activity for reactions like oxygen reduction and hydrogen oxidation. These are crucial for:
Hydrogen-powered vehicles.
Portable fuel cells for consumer electronics.
