School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Int J Biol Macromol. 2020 Aug 1;156:280-288. doi: 10.1016/j.ijbiomac.2020.04.031. Epub 2020 Apr 12.
In this study, calcium borate (CB) nanoparticles were in-situ grown onto cellulose acetate-laurate (CAL) template to prepare CB/CAL nanocomposite with uniform dispersion of CB nanoparticles by hydrothermal method. As-prepared CB/CAL nanoparticles were characterized by field emission scanning electron microscope, Fourier transforms infrared spectrometry, X-ray diffraction, and energy-dispersive X-ray spectroscopy. With average wear scar diameter (WSD), coefficient of friction (COF) and maximum non-seizure load (P) as evaluation criterions, CB/CAL, CAL, and CB were used as lubricant additives in poly-alpha-olefin (PAO) base oil to comparatively investigate the tribological properties with a four-ball tribotester. It was found that under the load of 490 N, the WSD and COF of PAO + CB/CAL (concentration of 0.6 wt%) reduced by 25.9% and 48.7%, respectively, and P increased by 79.6% compared with pure PAO base oil. CB/CAL nanocomposite exhibited superior lubricating performances than CB and CAL. In addition, the synergistic lubricating mechanism of CB/CAL nanocomposite as lubricant additive was explored.
在这项研究中，通过水热法将硼酸钙 (CB) 纳米颗粒原位生长到乙酸纤维素月桂酸酯 (CAL) 模板上，以制备具有 CB 纳米颗粒均匀分散的 CB/CAL 纳米复合材料。通过场发射扫描电子显微镜、傅里叶变换红外光谱、X 射线衍射和能谱对 CB/CAL 纳米粒子进行了表征。以平均磨损痕迹直径 (WSD)、摩擦系数 (COF) 和最大无卡咬负荷 (P) 为评价标准，将 CB/CAL、CAL 和 CB 作为润滑添加剂添加到聚α-烯烃 (PAO) 基础油中，使用四球摩擦试验机比较研究了它们的摩擦学性能。结果发现，在 490 N 的载荷下，与纯 PAO 基础油相比，PAO+CB/CAL（浓度为 0.6wt%）的 WSD 和 COF 分别降低了 25.9%和 48.7%，P 提高了 79.6%。CB/CAL 纳米复合材料表现出比 CB 和 CAL 更优异的润滑性能。此外，还探讨了 CB/CAL 纳米复合材料作为润滑添加剂的协同润滑机制。
