丁苯橡胶基白炭黑湿法复合技术工业化应用研究
发布时间：2019-01-07 11:50
【摘要】：白炭黑作为不依赖石油资源的增强填料,替代了炭黑而广泛应用到轮胎行业中,轮胎胎面胶添加白炭黑可以提高抗湿滑性能同时降低滚动阻力以达到节省油耗的目的。但是白炭黑表面存在大量羟基,使其与橡胶的相容性不好,而且有形成聚集体的倾向,在传统干法混炼时不易分散,生热高。本论文用硅烷偶联剂在水相中对白炭黑表面进行改性,再与丁苯橡胶(SBR)胶乳复合,经过破乳絮凝,改性白炭黑与SBR共沉,得到了白炭黑/SBR母胶,此过程中白炭黑几乎无损失,利用此湿法复合技术制备了白炭黑/SBR纳米复合材料。本论文首先考察了传统干法混炼时硅烷偶联剂Si69、巯基偶联剂KH590和新型偶联剂Si747对白炭黑/SBR纳米复合材料性能的影响；考虑到Si69为油溶性不适用于湿法复合技术,因此只对比了KH590和Si747湿法改性白炭黑后絮母胶制备白炭黑/SBR纳米复合材料的过程,得知Si747对白炭黑改性的效果优于KH590,接枝率高,而且Si747用量10%(以白炭黑干粉质量计)时效果最佳,但制备的白炭黑/SBR纳米复合材料的滚动阻力偏高；而KH590易焦烧,在工业上不安全。以后的研究中可以考虑KH590和Si747混用,同时在水相中加入这两种偶联剂或者先絮母胶再在后期冷辊混炼时补加,并调节二者的比例以利用湿法复合技术制备性能最佳的白炭黑/SBR纳米复合材料。此外,本论文研究了湿法复合过程中,水浴温度对Si747改性白炭黑以及制备白炭黑/SBR纳米复合材料的影响,确定了常温湿法复合技术的可行性,降低了湿法复合技术的工艺复杂性；并将常温湿法复合技术与传统干法混炼对比,分析了两种方法制备的白炭黑/SBR纳米复合材料的性能,证实了湿法复合技术更加省时节能,工艺简单,且环保无污染。最后,本论文探索了常温湿法复合技术的工业化应用前景,制备了不同白炭黑含量的白炭黑/SBR母胶,对比了白炭黑填充份数不同时的白炭黑/SBR纳米复合材料的性能,通过AFM观察发现即便高填充时常温湿法复合技术也可以使白炭黑在橡胶基体中达到纳米级分散且分散较为均匀；而且高份数白炭黑/SBR母胶可以填充到其他橡胶中,如ESBR和SSBR,扩大了母胶的应用领域。
[Abstract]:Silica, as an enhanced filler independent of petroleum resources, is widely used in tire industry instead of carbon black. Adding silica to tire tread rubber can improve wet slip resistance and reduce rolling resistance to save fuel consumption. However, there are a large number of hydroxyl groups on the surface of silica, which makes it not compatible with rubber, and has the tendency to form aggregates. It is not easy to disperse and generate high heat in traditional dry mixing. In this paper, silica surface was modified by silane coupling agent in water phase, then it was compounded with SBR (SBR) latex. After demulsification and flocculation, the modified silica and SBR co-precipitated, the silica / SBR master rubber was obtained. The white carbon black / SBR nanocomposites were prepared by using the wet composite technology. In this paper, the effects of silane coupling agent Si69, mercapto coupling agent KH590 and new coupling agent Si747 on the properties of silica / SBR nanocomposites were investigated. Considering that Si69 is not suitable for wet composite technology, only the process of preparing silica / SBR nanocomposites by KH590 and Si747 modified silica is compared. It is found that the effect of Si747 on the modification of silica is better than that of KH590,. When the amount of Si747 was 10%, the effect was the best, but the rolling resistance of the silica / SBR nanocomposites was higher. KH590 scorched easily and is not safe in industry. In future studies, we can consider the mixing of KH590 and Si747, and add these two coupling agents in the water phase, or the flocs first and then add them in the later cold roller mixing. The white carbon black / SBR nanocomposites with the best performance were prepared by wet composite technology by adjusting the ratio of them. In addition, the effects of water bath temperature on Si747 modified silica and the preparation of silica / SBR nanocomposites were studied in this paper, and the feasibility of wet composite technology at room temperature was determined. The process complexity of wet composite technology is reduced. The properties of silica / SBR nanocomposites prepared by the two methods were analyzed by comparing the normal temperature and wet composite technology with the traditional dry method. It was proved that the wet composite technology is more time-saving, simple, and environmentally friendly and pollution-free. Finally, the industrial application prospect of normal temperature and wet composite technology was explored in this paper. The silica / SBR master adhesive with different silica content was prepared, and the properties of silica / SBR nanocomposites with different filling ratios were compared. Through AFM observation, it was found that even with high filling temperature and humidity, silica could be dispersed in the rubber matrix at nanometer level and more evenly. Moreover, the high content silica / SBR master rubber can be filled into other rubber, such as ESBR and SSBR, to expand the application of the master rubber.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33
本文编号：2403628
[Abstract]:Silica, as an enhanced filler independent of petroleum resources, is widely used in tire industry instead of carbon black. Adding silica to tire tread rubber can improve wet slip resistance and reduce rolling resistance to save fuel consumption. However, there are a large number of hydroxyl groups on the surface of silica, which makes it not compatible with rubber, and has the tendency to form aggregates. It is not easy to disperse and generate high heat in traditional dry mixing. In this paper, silica surface was modified by silane coupling agent in water phase, then it was compounded with SBR (SBR) latex. After demulsification and flocculation, the modified silica and SBR co-precipitated, the silica / SBR master rubber was obtained. The white carbon black / SBR nanocomposites were prepared by using the wet composite technology. In this paper, the effects of silane coupling agent Si69, mercapto coupling agent KH590 and new coupling agent Si747 on the properties of silica / SBR nanocomposites were investigated. Considering that Si69 is not suitable for wet composite technology, only the process of preparing silica / SBR nanocomposites by KH590 and Si747 modified silica is compared. It is found that the effect of Si747 on the modification of silica is better than that of KH590,. When the amount of Si747 was 10%, the effect was the best, but the rolling resistance of the silica / SBR nanocomposites was higher. KH590 scorched easily and is not safe in industry. In future studies, we can consider the mixing of KH590 and Si747, and add these two coupling agents in the water phase, or the flocs first and then add them in the later cold roller mixing. The white carbon black / SBR nanocomposites with the best performance were prepared by wet composite technology by adjusting the ratio of them. In addition, the effects of water bath temperature on Si747 modified silica and the preparation of silica / SBR nanocomposites were studied in this paper, and the feasibility of wet composite technology at room temperature was determined. The process complexity of wet composite technology is reduced. The properties of silica / SBR nanocomposites prepared by the two methods were analyzed by comparing the normal temperature and wet composite technology with the traditional dry method. It was proved that the wet composite technology is more time-saving, simple, and environmentally friendly and pollution-free. Finally, the industrial application prospect of normal temperature and wet composite technology was explored in this paper. The silica / SBR master adhesive with different silica content was prepared, and the properties of silica / SBR nanocomposites with different filling ratios were compared. Through AFM observation, it was found that even with high filling temperature and humidity, silica could be dispersed in the rubber matrix at nanometer level and more evenly. Moreover, the high content silica / SBR master rubber can be filled into other rubber, such as ESBR and SSBR, to expand the application of the master rubber.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33
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