| 石墨提纯对隐晶质石墨/炭黑/羧基丁腈橡胶 复合材料性能的影响 |
| Effect of Graphite Purification on Properties of Cryptocrystalline Graphite/Carbon Black/XNBR Composites |
| 投稿时间：2021-05-12 修订日期：2021-05-12 |
| DOI：10.12136/j.issn.1000-890X.2021.09.0650 |
| 中文关键词: 隐晶质石墨 提纯 羧基丁腈橡胶 炭黑 复合材料 分散性 摩擦磨损性能 |
| 英文关键词: cryptocrystalline graphite purification XNBR carbon black composite dispersion friction and wear property |
| 基金项目:国家重点研发计划“大宗尾矿及低品质非金属矿高值化利用技术研究及示范”（2017YFB0310905） |
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| 中文摘要: |
| 采用酸处理法提纯隐晶质石墨（CG）可将其固定碳质量分数提高到0. 94，但仍残留少量难以除去的石英。采用乳液共混法制备CG/炭黑/羧基丁腈橡胶复合材料，研究CG提纯对复合材料性能的影响。结果表明：未提纯CG和提纯CG在橡胶基体中分散都较为均匀，但提纯CG具有更高的补强效率和更为优异的润滑性；添加提纯CG的复合材料摩擦因数和比磨损率均小于添加未提纯CG的复合材料，这可能是由于提纯CG中硬质杂质（如晶质石英）含量降低，在摩擦过程中更容易形成连续润滑膜和转移膜的缘故。 |
| 英文摘要: |
| The fixed carbon mass fraction of cryptocrystalline graphite（CG） could be increased to 0. 94 by purification with acid treatment，but a small amount of quartz also remained. The effect of CG purification on the properties of CG/carbon black/carboxylated nitrile rubber（XNBR） composites which were prepared by using the emulsion blending method was studied. The results showed that the dispersions of unpurified CG and purified CG in the rubber matrix were relatively uniform，but the purified CG had higher reinforcement efficiency and better lubricity. The friction coefficient and specific wear rate of the composites with purified CG were lower than those of the composites with unpurified CG，which might be due to the reduced content of hard large particle impurities（such as crystalline quartz） in the purified CG，which made it easier to form
a continuous lubrication film and a transfer film in the friction process. |
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