丁苯橡膠基白炭黑濕法復(fù)合技術(shù)工業(yè)化應(yīng)用研究
發(fā)布時(shí)間：2019-01-07 11:50
【摘要】：白炭黑作為不依賴石油資源的增強(qiáng)填料,替代了炭黑而廣泛應(yīng)用到輪胎行業(yè)中,輪胎胎面膠添加白炭黑可以提高抗?jié)窕阅芡瑫r(shí)降低滾動(dòng)阻力以達(dá)到節(jié)省油耗的目的。但是白炭黑表面存在大量羥基,使其與橡膠的相容性不好,而且有形成聚集體的傾向,在傳統(tǒng)干法混煉時(shí)不易分散,生熱高。本論文用硅烷偶聯(lián)劑在水相中對(duì)白炭黑表面進(jìn)行改性,再與丁苯橡膠(SBR)膠乳復(fù)合,經(jīng)過破乳絮凝,改性白炭黑與SBR共沉,得到了白炭黑/SBR母膠,此過程中白炭黑幾乎無(wú)損失,利用此濕法復(fù)合技術(shù)制備了白炭黑/SBR納米復(fù)合材料。本論文首先考察了傳統(tǒng)干法混煉時(shí)硅烷偶聯(lián)劑Si69、巰基偶聯(lián)劑KH590和新型偶聯(lián)劑Si747對(duì)白炭黑/SBR納米復(fù)合材料性能的影響；考慮到Si69為油溶性不適用于濕法復(fù)合技術(shù),因此只對(duì)比了KH590和Si747濕法改性白炭黑后絮母膠制備白炭黑/SBR納米復(fù)合材料的過程,得知Si747對(duì)白炭黑改性的效果優(yōu)于KH590,接枝率高,而且Si747用量10%(以白炭黑干粉質(zhì)量計(jì))時(shí)效果最佳,但制備的白炭黑/SBR納米復(fù)合材料的滾動(dòng)阻力偏高；而KH590易焦燒,在工業(yè)上不安全。以后的研究中可以考慮KH590和Si747混用,同時(shí)在水相中加入這兩種偶聯(lián)劑或者先絮母膠再在后期冷輥混煉時(shí)補(bǔ)加,并調(diào)節(jié)二者的比例以利用濕法復(fù)合技術(shù)制備性能最佳的白炭黑/SBR納米復(fù)合材料。此外,本論文研究了濕法復(fù)合過程中,水浴溫度對(duì)Si747改性白炭黑以及制備白炭黑/SBR納米復(fù)合材料的影響,確定了常溫濕法復(fù)合技術(shù)的可行性,降低了濕法復(fù)合技術(shù)的工藝復(fù)雜性；并將常溫濕法復(fù)合技術(shù)與傳統(tǒng)干法混煉對(duì)比,分析了兩種方法制備的白炭黑/SBR納米復(fù)合材料的性能,證實(shí)了濕法復(fù)合技術(shù)更加省時(shí)節(jié)能,工藝簡(jiǎn)單,且環(huán)保無(wú)污染。最后,本論文探索了常溫濕法復(fù)合技術(shù)的工業(yè)化應(yīng)用前景,制備了不同白炭黑含量的白炭黑/SBR母膠,對(duì)比了白炭黑填充份數(shù)不同時(shí)的白炭黑/SBR納米復(fù)合材料的性能,通過AFM觀察發(fā)現(xiàn)即便高填充時(shí)常溫濕法復(fù)合技術(shù)也可以使白炭黑在橡膠基體中達(dá)到納米級(jí)分散且分散較為均勻；而且高份數(shù)白炭黑/SBR母膠可以填充到其他橡膠中,如ESBR和SSBR,擴(kuò)大了母膠的應(yīng)用領(lǐng)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.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB33
本文編號(hào)：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.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB33
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