Introuduction of carbon nanotube conductive masterbatch
Carbon nanotube conductive masterbatch is an easy-to-disperse, highly filled conductive masterbatch made by pre-dispersing carbon nanotubes into plastic and other substrates.
• Composition
Usually composed of carbon nanotubes, carrier resin, dispersant, antioxidant, etc. Carbon nanotubes are the core component, providing excellent properties such as high conductivity; carrier resin as a matrix helps carbon nanotubes to better disperse and combine with other materials in subsequent processing; dispersant is used to improve the dispersion of carbon nanotubes in the carrier and reduce agglomeration; antioxidant can prevent carbon nanotubes and resin from being oxidized during processing and use.
• Performance characteristics
Carbon nanotube conductive masterbatch has excellent conductivity, can effectively reduce the volume resistivity of the material, and make polymer material products have good conductivity or antistatic properties; it has good thermal conductivity, which can help dissipate heat; it can enhance the mechanical strength of the material to a certain extent, improve the wear resistance and tensile resistance of the material; it has high chemical stability and maintains stable performance under different environments.
• Production method
Including the physical mixing method, which is to mix carbon nanotubes with carrier resin, additives, etc. evenly through physical means such as high-speed stirring and mixing; there is also a chemical synthesis method, which is to introduce carbon nanotubes during the resin synthesis process to chemically combine carbon nanotubes with resin molecular chains to obtain better dispersibility and bonding strength; in addition, the solution method is to dissolve carbon nanotubes and resin in an appropriate solvent, mix them evenly, and then remove the solvent to obtain a masterbatch.
• Application field
In the field of electronics and electrical appliances, carbon nanotube conductive masterbatch is used to manufacture the shells and parts of electronic equipment to prevent static electricity accumulation and electromagnetic interference; in the automotive industry, it can be used for automotive interior parts, instrument panels, electronic systems, and other parts to improve antistatic performance and safety; in the aerospace field, it is used to manufacture aerospace parts with conductive, antistatic and high strength requirements; in the packaging field, it is used to manufacture antistatic packaging materials to protect electronic products and other items that are susceptible to static electricity.
Advantages of carbon nanotube conductive masterbatch
• Excellent electrical conductivity
Carbon nanotube conductive masterbatch can significantly reduce the surface resistivity and volume resistivity of the material, making it have good conductive or antistatic capabilities. Just adding a small amount of carbon nanotube conductive masterbatch can make originally insulating materials achieve ideal conductive effects. For example, some electronic packaging materials can effectively prevent damage to electronic products caused by static electricity.
• Good dispersion
After special processing technology, carbon nanotubes are evenly dispersed in the masterbatch. When mixed with other materials for subsequent processing, this uniformly dispersed property helps it perform its conductive function better and avoids unstable conductive performance due to agglomeration. For example, during the plastic processing process, it can be evenly distributed inside the plastic product, so that the entire product can obtain stable conductive properties.
• Enhanced mechanical properties
Carbon nanotube conductive masterbatch can effectively enhance the mechanical properties of the matrix material. Carbon nanotubes themselves have high strength and modulus. When added to materials as conductive masterbatch, they can improve the tensile strength, bending strength, and impact strength of the material. For example, after being added to some engineering plastics, it can make plastic parts less likely to deform or be damaged when subjected to external forces.
• No issue of carbon powder falling off
Compared with carbon black, the amount of carbon nanotubes added to the masterbatch is very small to achieve the same resistance. Secondly, during the preparation process, the carbon nanotubes are evenly dispersed in the matrix resin of the master batch. The masterbatch is an integral structure. As long as its quality is qualified, the formula is reasonable, and the processing is good, the carbon nanotubes will be well fixed inside the masterbatch, and the carbon powder will not easily fall off the surface of the plastic product,will not produce dust.
• Good processing properties
It has good compatibility with various polymer matrix materials and can be well adapted to conventional plastic processing techniques during processing, such as extrusion, injection molding, blow molding, etc. This ensures manufacturers to easily produce conductive plastic products using existing equipment and processes.
• High stability
Carbon nanotube conductive masterbatch has good chemical stability and thermal stability and can maintain its conductive properties and physical properties under different chemical environments and temperature conditions. In a high-temperature environment, it will not be easily oxidized and lose its conductivity like some metal conductive materials; it can also maintain stable performance in environments with the risk of chemical corrosion.
