RETRACTED: Curing, mechanical, and tribological properties of hydrogenated nitrile butadiene rubber reinforced with <scp> Al <sub>2</sub> O <sub>3</sub> </scp> nanoparticles
Weizhan Yang, Chao Wang, Zenghui Liu, Jinzhu Tan
Abstract
Abstract A novel hydrogenated nitrile butadiene rubber (HNBR) composite filled with organically modified Al 2 O 3 nanoparticle was fabricated. The effects of nanoparticle Al 2 O 3 (nano‐Al 2 O 3 ) with different particle sizes on the curing, mechanical, and tribological properties of the HNBR composites were studied. Nano‐Al 2 O 3 with different particle sizes (i.e. 10, 50, 100, and 200 nm) was filled into the HNBR in this work. Attenuated total reflection Fourier transform infrared (ATR‐FTIR) spectroscopy was used to investigate the degree of grafting between modified nano‐Al 2 O 3 and rubber matrix. Universal material testing machine was used to study the mechanical properties of the HNBR composites. The tribological properties of the HNBR composites were tested by a ballon‐on‐disk tribometer. The wear morphology of the HNBR composite surface was examined by scanning electron microscopy (SEM). The test results reveal that the nano‐Al 2 O 3 as filler of HNBR composite promoted the vulcanization process, improved tensile and compressive strength, and increased hysteresis energy density and the damping coefficient. And the mechanical properties of the HNBR composite improved gradually with the decrease of nano‐Al 2 O 3 particle size. The friction and wear test results show that the addition of nano‐Al 2 O 3 greatly reduced the dry friction coefficient and specific wear rate of HNBR composites, and the friction coefficient and wear rate decreased gradually with the decrease of nano‐Al 2 O 3 size. The HNBR composite filled with 10 nm nano‐Al 2 O 3 had the better mechanical properties and anti‐wear performance due to that the 10 nm nano‐Al 2 O 3 could form denser cross‐linked network.