|
HS Code |
417561 |
| Chemical Formula | C |
| Appearance | Black powder |
| Purity | Typically >95% |
| Outer Diameter | 10-50 nm |
| Inner Diameter | 5-20 nm |
| Length | 1-20 μm |
| Specific Surface Area | 100-500 m²/g |
| Bulk Density | 0.1-0.3 g/cm³ |
| Electrical Conductivity | 10^3 to 10^6 S/m |
| Thermal Conductivity | 3000-6000 W/m·K |
| Ash Content | <1.5% |
| Tensile Strength | 11-63 GPa |
| Solubility | Insoluble in water |
As an accredited Multi-Walled Carbon Nanotube Powder factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The packaging is a sealed, opaque 100g bottle labeled "Multi-Walled Carbon Nanotube Powder," featuring clear hazard warnings and handling instructions. |
| Shipping | Multi-Walled Carbon Nanotube Powder is securely packed in sealed, moisture-resistant containers (such as bottles or drums) to prevent contamination and exposure. The shipment complies with relevant safety and transportation regulations, clearly labeled with hazard information. Handling instructions and safety data sheets are included to ensure safe transit and storage. |
| Storage | Store Multi-Walled Carbon Nanotube Powder in a tightly sealed container, in a cool, dry, and well-ventilated area, away from moisture and incompatible substances such as strong oxidizers. Avoid generating dust and minimize exposure to open air. Use non-sparking tools and prevent contamination. Label storage containers clearly, and ensure access is restricted to authorized, trained personnel with proper personal protective equipment. |
Competitive Multi-Walled Carbon Nanotube Powder prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to sales3@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8615365186327
Email: sales3@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Multi-walled carbon nanotubes, often abbreviated as MWCNTs, have changed the way engineers and researchers think about performance in advanced materials. As a manufacturer specializing in carbon nanomaterials, we have worked hands-on with MWCNTs from their early laboratory forms through to years of scale-up, optimization, and final application in demanding settings. Engineers, composite formulators, and electronics manufacturers tell us straight out: enhancing conductivity and mechanical resilience matters. We built our MWCNT powder around those needs, listening to feedback and improving characteristics that offer clear, practical advantages.
Inside our own facilities, the difference between multi-walled and single-walled carbon nanotube powders stands out from raw handling to continuous processing. Single-walled varieties roll up a single layer of graphene; MWCNTs have multiple concentric cylinders, typically numbering anywhere from five to fifty, nested like rings of a tree. For composite parts, this nested structure translates into far greater robustness during mixing, higher overall current-carrying capacity, and toughness against mechanical deformation. Single-walled options show higher theoretical conductivity in ideal lab conditions, but real-world users seeking reliable output at scale regularly come back for MWCNTs: the fibres resist breakage and deliver stable performance even through repeated processing.
Our own MWCNT powder, batch after batch, holds its diameter consistently between 10 and 30 nanometers, with lengths ranging from one to 20 microns. These numbers are not chosen by accident. Over a decade of process control improvements, we found that below 10 nm, powders get too dusty for many extrusion and melt-compounding lines. Above 30 nm, the powder starts to lose the fibrous interaction critical for creating percolation networks in composite matrices. For length, shorter tubes can reduce viscosity in polymer blends, but lose their bridging effect for both electrical and mechanical enhancement. Our customers in battery electrode manufacturing and antistatic compounding often confirm this range as the sweet spot, balancing dispersibility and reinforcing capability.
In electronics, the demands for better thermal and electrical paths never stop increasing. MWCNTs form the backbone of next-generation EMI shielding materials, replacing legacy fillers like carbon black or metal flakes. Lab results tell part of the story, but what matters is performance in tightly packed printed circuit boards, where overheating reduces lifetime dramatically. Many of our customers transitioned from legacy carbon-based additives to our MWCNT powder for just that reason; the tubes maintain conductivity at lower loading levels, keeping component weight and cost in check. Mobile device battery slurries, electric vehicle component molding, and high-frequency enclosure shells all benefit from this shift.
Polymer composite manufacturers come to multi-walled carbon nanotubes for more than electricity. Rigidity, working durability, and damage tolerance all improve in structural plastics after incorporation, as these tubes distribute stress microstructurally and give better impact resistance. Our production lines already focus on powder purity, surface area, and straightness of the MWCNTs—these traits directly influence how well the powder integrates within host matrices and how efficiently it creates reinforcing networks. In thermoset and thermoplastic product development, partners have found they can meet strict product certification standards with fewer additives, which trims side effects like embrittlement or unwanted color changes.
High-performance materials only deliver when consistency is reliable at industrial scale. Over many years working alongside technical partners in Europe, Asia, and North America, we have faced just how sensitive manufacturing lines are to small changes in raw materials. Differences in surface residue, metal catalyst content, or tube aggregation will ripple all the way through to finished parts. For our MWCNT powder, we put attention into purification steps to keep metal catalyst residue below one percent and design our filtration stages to minimize non-tubular carbon byproducts.
Many users measure purity through Raman spectroscopy or elemental analysis, but even more, they judge on their line: irregular powder leads to processing headaches, costly downtime, and product recall risks. We take pride in hearing from long-time OEM partners who run continuous lines, year after year, citing ease of mixing, low filter clogging, and consistent finished properties. Reliability stems from disciplined process control, strong feedback loops from clients, and routine investments in process upgrades.
Every factory batch tells a new story. From our perspective, most of the real breakthroughs come when users push materials outside their first intended purpose. Lithium-ion battery anodes were once a niche experiment; now, MWCNT powder routinely improves battery energy density and cycle life by forming conductive bridges between graphite or silicon host particles. We have also seen MWCNTs step into water filtration membranes, where their unique shape and surface chemistry enable advanced separation properties that bulky granular carbons cannot achieve.
In high-performance coatings and adhesives, companies originally struggled with dispersing carbon nanotubes evenly. Over time, close work with process engineers led us to prepare surface-modified grades—subtly changing how easily nanotubes interact with host resins and with each other, sidestepping the ‘clumping’ seen in less optimized powders. This effort required investment in better surface activation and fine control of tube length, both of which let manufacturers cut their total additive levels, pass quality tests, and sidestep wasteful trial-and-error.
Manufacturing multi-walled carbon nanotubes sits at the edge of what chemical reactor engineering can do. High temperatures, sensitive gas environment control, and attention to catalyst behavior remain non-negotiable. We have seen firsthand how small changes to reactor feed rates or temperature zoning can skew tube diameter, alter wall count, or leave impurities that later trigger agglomeration problems in compounding. Getting consistent growth means monitoring not just output, but all upstream variables together in real time.
Once raw tubes are created, the process isn’t complete. Post-processing—purification, sizing, and packaging—often separates laboratory-grade powders from production-ready materials. Many solutions in the literature focus on acid washing to clean up surface impurities, yet aggressive purification can damage tube surfaces, introduce functional groups, or shorten tubes below their optimal working range. Over multiple development cycles, we refined our purification protocols to strike a compromise: maintaining mechanical strength while hitting the purity targets demanded by power electronics and battery applications.
Talking with composite engineers across a range of sectors, we hear repeated frustration: not all MWCNT powders are alike. Product names rarely tell the full story. High ash content, poorly defined tube lengths, or excess metallic residue cause headaches in real manufacturing runs. Our facilities have invested in integrated analytics, not only for batch approval, but to watch for drifts in characteristics over time. Customers switching from suppliers dominated by batch-to-batch swings have told us they value stable tube morphology, specified diameter and length distributions, and traceable manufacturing lots.
We also place particular emphasis on flowability and bulk density. Factory floors rely on powders that feed well, resist dusting, and don’t stick or bridge in hoppers—problems that slow down large-scale mixing or extrusion. Years of fielding calls from frustrated plant technicians drove us to press for advancements in powder preparation, including granulation steps uniquely adapted for our MWCNTs. Improved flow fixes downtime and means more accurate dosing, supporting customers pushing their own quality certifications.
Direct communication with research groups and production companies laid the groundwork for development of multiple surface-modified versions. Teams involved in epoxy, PU, or silicone compounding each face their own compatibility issues. We manufacture several grades of MWCNTs, each functionalized for a different host matrix and use case—shortening what used to be months of troubleshooting for our partners. Fast feedback loops with pilot lines guide what changes should matter, helping us offer reliable, low-residue powders that blend smoothly and skip unnecessary filtration steps.
True responsibility as a chemical manufacturer means not leaving safety as an afterthought. We know technicians will handle MWCNT powders in a range of environments—from high-speed mixing to manual weighing at research institutes. Our staff undergo routine training in safe powder management, but we also conduct workshops for customer partners, focusing on dust mitigation, containment, and best practices for respiratory protection. Recommending suitable local exhaust in mixing rooms and an emphasis on closed powder transfer has helped clients decrease worker exposure, keeping records clean during audits and inspections.
Environmental and regulatory trends have shifted in the last ten years. We have followed updates in REACH and relevant US regulations, engaging with compliance officers at both customer sites and local authorities to ensure downstream users stay informed. For example, our engineering team has worked with battery plant designers to select powder-feed systems that minimize accidental emissions and limit worker exposure, based on plant layout and throughput.
From small pilot needs to weekly industrial shipments, scaling up MWCNT powder production involves practical logistics. Powder compaction, specialty drum packaging, and timed shipments, all have to match the pace of modern manufacturing. We coordinate with customer purchasing teams to synchronize deliveries to avoid unplanned inventory spikes or downtime on their lines. Consistency at scale requires not just technical skills in nanotube synthesis, but strong relationships and reliability in packaging, documentation, and shipping.
Many of our partners began with limited R&D trials and grew their programs over several years. Drawing on their feedback, we offer technical support at every stage—from selection and handling guidance to process troubleshooting once their in-house mixing or compounding begins. Our direct experiences in the field, troubleshooting alongside client engineers, have strengthened our sense for both immediate needs and future standards as end-products become more demanding.
As electric vehicles, consumer electronics, and energy storage push materials requirements higher each year, MWCNT powders will remain at the center of performance discussion. Our hands-on process experience tells us the best powder is one that not only meets spec sheets, but also delivers real results in unpredictable commercial settings. No two compounding lines or molding operations run the same way, but good process feedback bridges the gap between lab data and real-life outcomes.
We continue to invest in reactor upgrades, advanced purification, and customer-specific functionalization to stay ahead of shifting material standards. More end-users are building cross-disciplinary teams to look for new functionalities—EMI shielding in lightweight structures, advanced filtration, and lower-cost energy storage. Each of these pushes us to keep improving surface treatment, dispersion stability, and supply chain reliability. Strong partnerships with downstream users make it possible to trial new formulations and find early insights before problems grow costly.
Developing and producing MWCNT powder draws on every part of a chemical manufacturing company: research, scale-up, logistics, safety, and customer support. Real experience—shaped on the floor, in the lab, and through teamwork with users—keeps us focused on reliability and continuous improvement. Reliable carbon nanotube powder doesn’t come from theory alone; it emerges from years of refinement, a willingness to adapt, and responsiveness to both challenges and opportunities passed back along the supply chain. By anchoring our process in day-to-day manufacturing realities, we help innovators in electronics, composites, coatings, energy systems, and beyond meet the evolving challenges of modern materials engineering.
