دانلود رایگان مقاله طراحی نانولوله کربن برای تقویت لاستیک و برنامه جهت عملکرد بالای لاستیک

Abstract

Carbon nanotubes (CNTs) attract considerable scientific and engineering interest because of their excellent mechanical, electrical and thermal properties. Today, when manufacturers use CNTs, purification, chemical modifications and dispersion techniques are usually applied rendering them cost-effective in large-scale applications. Our research shows that multi-wall CNTs bundles (MWCNTBs) with the same alignment, orientation and high surface defects for each CNT can be directly incorporated into the elastomer matrix through melt compounding. A uniform dispersion of CNTs and strong interfacial interactions between elastomers and CNTs due to the silane-coupling agent can be simultaneously produced. The resulting elastomer/MWCNTBs nanocomposites demonstrate excellent mechanical properties, high thermal conductivity and low volume resistivity. Note that this nanocomposite is achieved using common compounding equipment that is easy to industrialize. Through further scale-up, we confirmed that this elastomer/MWCNTBs nanocomposite has the most optimized comprehensive performance with practical applications for fuel-savings and engineering tires. These advantages include fuel efficiency, anti-static electricity and long-time fatigue resistance. In light of the large number of tires used worldwide, this work is promising for future large-scale industrial applications of CNTs.

4. Conclusion

Our study introduced novel approach to prepare a particular kind of MWCNTs with good dispersion in the rubber matrix. First, MWCNTs were designed to grow along a fixed direction to lessen or reduce inter-entanglements. Then more graphite topology structures were introduced to CNT surfaces by controlling the experimental parameters. Further, in-situ silane modification improved the interfacial adhesion between CNTs and rubber matrix in the rubber/HDCNTBs system. The resulting rubber/CNT nanocomposite had excellent mechanical, thermal conductive properties as well as good crack-growth resistance and fatigue properties. Therefore, combined with the present facile compounding technique in the tire industry, such rubber/CNT nanocomposites are successfully applied to the scale-up production of high-performance fuel-saving and engineering tires. Our study demonstrated way to fabricate the next-generation of green tires, and on the other hand opens up a viable opportunity for the largescale application of CNTs.