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  本文關(guān)鍵詞：二硫化鉬基復合材料的制備及其摩擦學性能研究　出處：《江蘇大學》2017年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 二硫化鉬 納米復合材料 氧化石墨烯 銅 摩擦性能

【摘要】：二硫化鉬(MoS_2)作為典型的過渡金屬化合物,具有特殊的層狀結(jié)構(gòu),層與層間依靠及其微弱的范德華力相連接,在低應力載荷下就能發(fā)生滑移從而在金屬摩擦面形成轉(zhuǎn)移膜,因此具有優(yōu)異的潤滑性能,然而純二硫化鉬由于硬度低、結(jié)構(gòu)松散和粘附強度差等因素使其很容易在低應力載荷下失效,因此需要制備復合材料來改善二硫化鉬的抗磨性能。本論文通過簡便的水熱法制備出二硫化鉬納米片,并以其為載體引入氧化石墨烯、磁性納米粒子、金屬納米粒子制備出氧化石墨烯-二硫化鉬、銅-二硫化鉬、四氧化三鐵-二硫化鉬以及銅-氧化石墨烯-二硫化鉬復合材料,并將它們作為潤滑添加劑研究其摩擦性能,具體工作內(nèi)容如下:1.以氧化石墨烯、硫代乙酰胺和半胱氨酸為前驅(qū)體,在水熱條件下制備出MoS_2-GO納米復合材料,結(jié)果表明二硫化鉬納米片均勻負載于氧化石墨烯的表面,同時納米片由4-7層的單分子層組成,鑒于納米復合材料具有特殊的層狀結(jié)構(gòu)以及組分間的協(xié)同潤滑作用,因此將MoS_2和MoS_2-GO納米材料分別作為潤滑油添加劑考察其摩擦性能,研究表明相比于MoS_2納米添加劑,MoS_2-GO具有更優(yōu)異的減摩和抗磨性能,當MoS_2-GO的質(zhì)量比為1 wt%,達到最低的摩擦系數(shù)為0.0557。2.以二硫化鉬納米片為載體,六水合三氯化鐵為鐵源,乙醇和水混合溶液為溶劑,通過水熱反應將粒徑為15納米的四氧化三鐵納米粒子負載到二硫化鉬表面從而制備得到Fe_3O_4-MoS_2納米復合材料,由于MoS_2易于在摩擦表面形成轉(zhuǎn)移膜同時引入的磁性納米粒子能夠讓生成的轉(zhuǎn)移膜更加穩(wěn)定,因此將其作為潤滑添加劑研究其摩擦性能,實驗結(jié)果表明當質(zhì)量濃度比為1.5 wt%時能夠達到最低摩擦系數(shù)為0.0565。3.以二硫化鉬納米片為載體,多巴胺為表面改性劑,醋酸銅為銅源,次亞磷酸鈉為還原劑,通過化學還原反應成功制備Cu-MoS_2納米復合材料,結(jié)果表明二硫化鉬納米片的表面吸附了一層多巴胺分子,使粒徑為8-15納米的銅金屬粒子更加均勻的負載于納米片表面,由于MoS_2在摩擦過程中易于成膜以及表面負載的金屬納米粒子起到微觀軸承的作用,因此研究其摩擦性能,結(jié)果表明當0.5wt%的Cu-MoS_2作為潤滑添加劑時具有最優(yōu)異的摩擦性能,摩擦系數(shù)為0.0433。4.以二硫化鉬-氧化石墨烯為載體,多巴胺為改性劑,醋酸銅為銅源,次亞磷酸鈉為還原劑,通過水熱還原反應將銅納米粒子均勻負載在納米復合材料表面,鑒于MoS_2和GO間的協(xié)同潤滑以及在表面引入的金屬粒子能夠改變摩擦方式等因素,因此將其作為潤滑油添加劑研究摩擦性能,結(jié)果表明當加入1 wt%的Cu-MoS_2-GO時,摩擦系數(shù)最低為0.0408。
[Abstract]:Molybdenum disulfide (MoS _ 2) as a typical transition metal compound, it has a special layered structure, which depends on the weak van der Waals force. Under low stress load slippage can take place to form a transfer film on the metal friction surface, so it has excellent lubricity, but pure molybdenum disulfide has low hardness. The loose structure and poor adhesion strength make it easy to fail under low stress load. In order to improve the antiwear performance of molybdenum disulfide, molybdenum disulfide nanocrystals were prepared by a simple hydrothermal method, and graphene oxide and magnetic nanoparticles were introduced as the carrier. The composites of graphene oxide molybdenum disulfide copper molybdenum disulfide iron trioxide molybdenum disulfide and copper graphene oxide molybdenum disulfide were prepared by metal nanoparticles. They were used as lubricating additives to study their tribological properties as follows: 1. Graphene oxide, thioacetamide and cysteine were used as precursors. MoS_2-GO nanocomposites were prepared under hydrothermal conditions. The results showed that molybdenum disulfide nanoparticles were uniformly loaded on the surface of graphene oxide, and the nanostructures were composed of 4-7 monolayer layers. In view of the special layered structure of nanocomposites and the synergistic lubrication between the components, MoS_2 and MoS_2-GO nano-materials were used as lubricating oil additives to investigate their friction properties. The results show that MoS2-go has better antifriction and antiwear properties than MoS_2 nano-additive MoS2-GO, when the mass ratio of MoS_2-GO is 1 wt%. The lowest friction coefficient was 0.0557.2. The molybdenum disulfide nanoparticles were used as the carrier, the ferric chloride hexahydrate as Tie Yuan and the mixed solution of ethanol and water as the solvent. Fe_3O_4-MoS_2 nanocomposites were prepared by hydrothermal reaction by loading 15 nanometer-sized iron trioxide nanoparticles onto the surface of molybdenum disulfide. Because MoS_2 is easy to form a transfer film on the friction surface and the magnetic nanoparticles can make the resulting transfer film more stable, it is used as a lubricating additive to study its tribological properties. The experimental results show that the lowest friction coefficient is 0.0565.3 when the mass concentration ratio is 1.5 wt%. Using molybdenum disulfide nanoparticles as the carrier, dopamine as the surface modifier, copper acetate as the copper source. Cu-MoS_2 nanocomposites were successfully prepared by chemical reduction reaction with sodium hypophosphite as reducing agent. The results showed that a layer of dopamine molecules was adsorbed on the surface of molybdenum disulfide nanoparticles. The copper particles with the particle size of 8-15 nanometers are more evenly loaded on the surface of the nanocrystals, because MoS_2 is easy to form film in the friction process and the metal nanoparticles loaded on the surface play the role of micro-bearing. The results show that 0.5wt% Cu-MoS_2 has the best friction performance when it is used as lubricating additive. The friction coefficient is 0.0433.4. MoS _ 2-graphene oxide is used as carrier, dopamine as modifier, copper acetate as copper source and sodium hypophosphite as reducing agent. Copper nanoparticles were uniformly loaded on the surface of nanocomposites by hydrothermal reduction reaction. Due to the synergistic lubrication between MoS_2 and go and the introduction of metal particles on the surface, the friction mode could be changed. The results show that the friction coefficient is the lowest 0.0408 when 1 wt% Cu-MoS_2-GO is added.
【學位授予單位】：江蘇大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TB33;TQ136.12

【參考文獻】

相關(guān)期刊論文 前6條

1 馬琳;常q;陳衛(wèi)祥;;輕度剝離二硫化鉬/石墨烯復合材料的制備及其電化學儲鋰性能[J];中國科技論文;2013年12期

2 王國棟;蔣麗娟;李來平;劉燕;張新;;二硫化鉬潤滑劑應用研究進展[J];中國鉬業(yè);2013年05期

3 白鴿玲;吳壯志;;二硫化鉬納米球的制備及其摩擦性能研究[J];潤滑與密封;2013年04期

4 閆玉濤;胡廣陽;李夜;孫志禮;;納米二硫化鉬粉體制備及其摩擦學性能[J];東北大學學報(自然科學版);2009年03期

5 張文鉦;;二硫化鉬潤滑劑研究進展[J];中國鉬業(yè);2005年06期

6 趙江,付玉娥;簡述高檔潤滑油基礎(chǔ)油的性能和應用[J];石油商技;2003年01期

相關(guān)博士學位論文 前2條

1 張向華;超薄MS_2（M=Mo,W）納米片的制備與性能研究[D];江蘇大學;2014年

2 李文彬;含金納米粒子及含絲素蛋白的兩類自組裝納米結(jié)構(gòu)的制備[D];東華大學;2008年

相關(guān)碩士學位論文 前3條

1 邵兵;應用多相系統(tǒng)制備形貌可控的金屬及氧化物納米材料[D];江蘇大學;2009年

2 王立冬;納米二氧化硅/共軛聚合物（聚芴）復合物的制備及性能研究[D];吉林大學;2008年

3 程鐵峰;聚合物、有機－無機復合納米微粒的制備、表征及摩擦學行為研究[D];河南大學;2003年

，

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