【摘要】：二硫化鉬(MoS2)具有特殊的層狀結(jié)構(gòu),當(dāng)受到外力時(shí),層與層之間弱的范德華力很容易斷裂而產(chǎn)生滑移,所以具有很低的摩擦系數(shù),是一種優(yōu)良的潤(rùn)滑劑。與普通MoS2相比,納米MoS2具有更低的摩擦系數(shù),減摩抗磨效果更好,由于具有納米尺寸效應(yīng),與聚合物基體的界面結(jié)合作用也明顯增強(qiáng),是一種很有潛力的橡膠抗磨添加劑。第一部分：探究三種儀器(超聲清洗器、超聲細(xì)胞粉碎機(jī)和高速球磨機(jī))液相剝離MoS：的最佳條件,通過(guò)掃描電子顯微鏡(SEM)和透射電子顯微鏡(TEM))對(duì)MoS2的表面形貌以及片層厚度進(jìn)行表征。結(jié)果表明,三種儀器均能將微米MoS2剝離成片層較薄且部分成納米尺度的納米MoS2。超聲清洗器、超聲細(xì)胞粉碎機(jī)、高速球磨機(jī)最佳液相剝離MoS2的條件分別為：超聲1h、超聲8次、球磨1h。第二部分：制備MoS2/炭黑/丁腈橡膠復(fù)合材料和MoS2/炭黑/天然橡膠復(fù)合材料,研究MoS：的含量變化對(duì)復(fù)合材料性能的影響。在MoS2/炭黑/NBR復(fù)合材料中MoS2仍然保持著原有的層狀結(jié)構(gòu),未經(jīng)剝離的普通MoS2會(huì)降低復(fù)合材料的耐磨性能,而經(jīng)過(guò)剝離的MoS2可以有效提高復(fù)合材料的耐磨性能。在MoS2/炭黑/NR復(fù)合材料中,隨MoS2含量的增加,復(fù)合材料性能的變化沒(méi)有規(guī)律可循,這可能與天然橡膠的結(jié)構(gòu)有關(guān)。第三部分：利用乳液-共絮凝的方法,制備了MoS2/丁苯橡膠和MoS2/炭黑/丁苯橡膠納米復(fù)合材料,研究不同MoS2含量對(duì)橡膠復(fù)合材料各項(xiàng)性能尤其是對(duì)耐磨性能的影響。結(jié)果表明,在兩種體系中,隨著MoS2含量的增加,復(fù)合材料的力學(xué)性能以及耐磨性能均有所提高,且MoS2/SBR復(fù)合材料性能提高的幅度要比MoS2/炭黑/SBR復(fù)合材料的大。第四部分：研究不同MoS2填充份數(shù)對(duì)MoS2/白炭黑/丁苯橡膠復(fù)合材料性能的影響。在白炭黑填充體系中,隨著MoS2含量的增加,復(fù)合材料的力學(xué)性能有小幅度增加,而耐磨性能提高較為顯著,填充10phr MOS2的復(fù)合材料的阿克隆體積磨耗量比純白炭黑填充的復(fù)合材料降低了46%。第五部分：制備MoS2-丁吡橡膠/丁苯橡膠復(fù)合材料,在乳液-共絮凝過(guò)程中,用等量(10phr)的丁吡橡膠替代丁苯橡膠,以MoS2填充量為變量,研究丁苯橡膠復(fù)合材料各項(xiàng)性能與MoS：含量變化的關(guān)系。結(jié)果表明隨著MoS：的增加,復(fù)合材料的力學(xué)性能有較大提高,且相同MoS2填充量的MoS2-VPR/SBR復(fù)合材料的力學(xué)性能以及耐磨性能,要比未用丁吡橡膠替代的MoS2/SBR復(fù)合材料提高很多。這是因?yàn)槎∵料鹉z在體系中充當(dāng)MoS2與丁苯橡膠的橋梁,可以增強(qiáng)MoS2與丁苯橡膠基體之間的界面結(jié)合作用,繼而提高丁苯橡膠復(fù)合材料的力學(xué)性能以及耐磨性能。當(dāng)MoS2填充份數(shù)為2phr時(shí),復(fù)合材料的耐磨性能最好,阿克隆體積磨耗量為0.23cm3/1.61km。
[Abstract]:Molybdenum disulfide (MoS2) has a special layered structure. When it is subjected to external force, the weak van der Waals force between the layers is easy to break and slip, so it has a very low friction coefficient and is an excellent lubricant. Compared with ordinary MoS2, nano MoS2 has lower friction coefficient and better antiwear effect. Because of nanometer size effect, the interfacial bonding with polymer matrix is obviously enhanced, which is a potential rubber antiwear additive. Part one: explore the optimal conditions for liquid phase stripping of MoS: from three kinds of instruments (ultrasonic cleaner, ultrasonic cell pulverizer and high speed ball mill). The surface morphology and lamellar thickness of MoS2 were characterized by scanning electron microscopy (SEM) and transmission electron microscope (TEM). The results show that all of the three instruments can peel micron MoS2 into thin and partially nanoscale MoS2.. The optimal liquid phase MoS2 stripping conditions of ultrasonic cleaner, ultrasonic cell pulverizer and high speed ball mill were as follows: ultrasound 1 h, ultrasonic 8 times, ball mill 1 h. In the second part, MoS2/ carbon black / nitrile rubber composites and MoS2/ carbon black / natural rubber composites were prepared. The effect of the content of MoS: on the properties of the composites was studied. In the MoS2/ carbon black / NBR composites, MoS2 still maintains the original layered structure. The unpeeled ordinary MoS2 can reduce the wear resistance of the composites, while the exfoliated MoS2 can effectively improve the wear resistance of the composites. In MoS2/ carbon black / NR composites, with the increase of MoS2 content, the properties of the composites have no regular change, which may be related to the structure of natural rubber. The third part: the MoS2/ SBR and MoS2/ carbon black / SBR nanocomposites were prepared by the emulsion-co-flocculation method. The effects of different MoS2 content on the properties of the rubber composites, especially on the wear resistance were studied. The results show that the mechanical properties and wear resistance of the composites are improved with the increase of MoS2 content in the two systems, and the improvement range of the properties of the MoS2/SBR composites is larger than that of the MoS2/ carbon black / SBR composites. Part four: the effect of different MoS2 content on the properties of MoS2/ silica / SBR composites was studied. In the silica filled system, with the increase of MoS2 content, the mechanical properties of the composites increased slightly, while the wear resistance of the composites increased significantly. The Akron volume attrition of the composites filled with 10phr MOS2 was 46% lower than that of the composites filled with pure silica. The fifth part: MoS2- butadiene rubber / styrene-butadiene rubber composite was prepared. In the process of emulsion-co-flocculation, butadiene rubber was replaced by equal amount of butadiene rubber (10phr), and the filling amount of MoS2 was taken as the variable. The relationship between the properties of styrene-butadiene rubber composites and the content of MoS: was studied. The results show that with the increase of MoS:, the mechanical properties and wear resistance of MoS2-VPR/SBR composites with the same content of MoS2 are improved. It is much higher than the MoS2/SBR composite instead of butadiene rubber. This is because butadiene rubber acts as a bridge between MoS2 and styrene-butadiene rubber in the system, which can enhance the interfacial bonding between MoS2 and SBR matrix, and then improve the mechanical properties and wear resistance of SBR composites. When the content of MoS2 is 2phr, the wear resistance of the composite is the best, and the volume attrition of Akron is 0.23 cm ~ 3 / 1.61km.
【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(lèi)號(hào)】：TB332

【引證文獻(xiàn)】

相關(guān)會(huì)議論文 前1條

1 劉敏;胡坤宏;田明;胡獻(xiàn)國(guó);;單層MoS_2重堆積產(chǎn)物的摩擦學(xué)特性研究[A];2006全國(guó)摩擦學(xué)學(xué)術(shù)會(huì)議論文集（一）[C];2006年

，

本文編號(hào)：2328418