无烟煤的插层和磨剥改性及对丁苯橡胶填充性能研究

发布时间：2018-10-10 16:56

【摘要】：基于高煤化度无烟煤具有似石墨层状结构的特点,对无烟煤进行插层和球磨改性,提高其结构活性和分散性能,制备煤基功能性粉体填料,替代炭黑,改善橡胶复合材料的性能。在无烟煤的溶胀实验中发现吡啶/二甲苯处理煤的溶胀率最高,具有插层作用,有效扩大了芳香片层的层间距。当丙烯酸胺聚合改性无烟煤煤样时,石墨衍射峰向小角度偏移,实现了对芳香片层的插层改性;随着煤样含量的增加,插层程度呈现先增大后减小的趋势。在无烟煤的磨剥改性过程中,经磺酸盐-TB联合改性煤样的-2μm粒度累计百分含量为91%左右,颗粒之间相互接触很少,分散性很好。以LA-TA干法改性煤样填充橡胶的力学性能较纯胶有了大幅提高,拉伸强度达到15.8MP,与炭黑-330的填充性能相当。改性煤粉填充丁苯橡胶复合材料的透气率较纯丁苯橡胶也有大幅下降,相对渗透率仅为纯胶的6.72%,具有很好的气体阻隔性能。采用插层-磨剥改性的工艺,获得了一种制备具有增强、阻隔双重功效的煤基功能性材料的新方法。
[Abstract]:Based on the characteristics of graphite-like layered structure of anthracite with high coal content, anthracite was modified by intercalation and ball milling to improve its structural activity and dispersibility, and to prepare coal-based functional powder filler instead of carbon black. Improve the properties of rubber composites. In the swelling test of anthracite, it was found that pyridine / xylene treated coal had the highest swelling rate, had intercalation effect, and effectively enlarged the interlayer spacing of aromatic lamellae. When the anthracite sample is modified by the polymerization of acrylic amine, the graphite diffraction peak shifts to a small angle, which realizes the intercalation modification of the aromatic lamellar layer, and the intercalation degree increases first and then decreases with the increase of coal sample content. During the grinding and peeling modification of anthracite, the content of-2 渭 m granularity of the coal sample modified by sulfonate-TB is about 91%, and the particles have little contact with each other, and the dispersity is very good. The mechanical properties of the rubber filled with LA-TA modified coal samples were improved greatly compared with the pure rubber. The tensile strength of the rubber was 15.8MP. it was similar to the filling property of the carbon black 330. The permeability of the modified pulverized coal filled styrene-butadiene rubber composite is also decreased significantly compared with that of pure styrene-butadiene rubber, and the relative permeability is only 6.72 of pure rubber, which has good gas barrier performance. A new method for preparing coal-based functional materials with enhanced and barrier effects was obtained by intercalation and abrasion modification.
【学位授予单位】：河南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ333.1;TD849

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