Han Deshang, Zhang Quanzhong, Zhao Weifu, Liu Changxia, Wang Lin
College of Transportation, Ludong University, Yantai 264025, China.
Analysis and Testing Center, Ludong University, Yantai 264025, China.
Polymers (Basel). 2024 Aug 14;16(16):2294. doi: 10.3390/polym16162294.
Mixing involves blending raw rubber or masticated rubber with additives using a rubber mixer, which is the most critical process in rubber production. The internal mixer, as the most important mixing equipment, experiences rotor wear during prolonged operation, affecting the gap between the mixer rotor and the chamber wall. This wear reduces mixing effectiveness, weakens filler dispersion, and ultimately impacts rubber performance. In recent years, as research on multi-walled carbon nanotubes (MWCNTs) and nanomaterials has deepened, their broad application prospects have become increasingly apparent. The objective of the present study is to understand and quantify rotor wear in rubber blends during the mixing process as influenced by multi-walled carbon nanotubes. This study found that with the increase in MWCNT content, the proportion of abrasive wear rises, while the proportion of corrosive wear decreases, leading to reduced overall wear. Compared to rubber without MWCNTs, the Payne effect decreased by 6.78%, 9.57%, 13.03%, 20.48%, and 26.06% with the addition of 1 phr, 3 phr, 5 phr, 7 phr, and 9 phr of MWCNTs, respectively. The friction coefficients between the rubber and metal increased by 6.31%, 8.57%, 25.43%, 39.31%, and 47.61%, while the metal wear rate decreased by 9.08%, 10.73%, 13.41%, 17.46%, and 25%. Conversely, the friction coefficients were reduced by 19.39%, 22.42%, 33.94%, 66.06%, and 76.36%.
混炼是指使用橡胶混炼机将生胶或塑炼胶与添加剂进行混合，这是橡胶生产中最关键的工序。密炼机作为最重要的混炼设备，在长期运行过程中会出现转子磨损，影响混炼机转子与机腔壁之间的间隙。这种磨损会降低混炼效果，削弱填料分散性，最终影响橡胶性能。近年来，随着对多壁碳纳米管（MWCNTs）和纳米材料研究的深入，其广阔的应用前景日益明显。本研究的目的是了解和量化在混炼过程中多壁碳纳米管对橡胶共混物转子磨损的影响。研究发现，随着MWCNT含量的增加，磨料磨损比例上升，而腐蚀磨损比例下降，导致总体磨损减少。与不含MWCNTs的橡胶相比，分别添加1 phr、3 phr、5 phr、7 phr和9 phr的MWCNTs后，Payne效应分别降低了6.78%、9.57%、13.03%、20.48%和26.06%。橡胶与金属之间的摩擦系数分别增加了6.31%、8.57%、25.43%、39.31%和47.61%，而金属磨损率分别降低了9.08%、10.73%、13.41%、17.46%和25%。相反，摩擦系数分别降低了19.39%、22.42%、33.94%、66.06%和76.36%。
