本文關(guān)鍵詞：硼酸酯在聚醚水溶液中的摩擦學(xué)性能研究　出處：《北京交通大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 水基潤滑液 十二醇無規(guī)共聚醚 三異丙醇胺環(huán)硼酸酯 摩擦磨損性能 流變性能 成膜性能

【摘要】：隨著資源的可持續(xù)性發(fā)展和環(huán)保理念的不斷提高,綠色無污染的水基潤滑液受到了越來越多的青睞。但是,水基潤滑液的成膜、潤滑和防腐蝕等性能相對較差,因此需要選擇性能優(yōu)良的水溶性潤滑添加劑來改善其摩擦學(xué)性能。本研究選取十二醇無規(guī)共聚醚(Dodecanol randomcopolyether,CPE)和二異丙醇胺環(huán)硼酸酯(Triisopropanolamineborate,BN)為添加劑,分別對CPE和CPE-BN兩種水溶液進(jìn)行相關(guān)的摩擦學(xué)試驗(yàn)研究。首先,利用四球試驗(yàn)機(jī)對兩種水溶液進(jìn)行摩擦磨損性能研究,主要分析其減摩抗磨性能、穩(wěn)定性能和極壓性能,然后利用三維白光共聚表面形貌儀和X射線光電子能譜分析儀對鋼球磨斑表面進(jìn)行分析。結(jié)果表明,兩種水溶液均具有較好的減摩性能,加入BN后,CPE水溶液的抗磨性能和穩(wěn)定性能均有所提高,最大無卡咬負(fù)荷(PB值)增大了 11.6%,極壓性能有所提高。CPE-BN水溶液的性能之所以提高主要是因?yàn)樵谀Σ吝^程中形成了化學(xué)吸附膜和化學(xué)反應(yīng)膜,二者共同作用起到了良好的潤滑效果。其次,利用旋轉(zhuǎn)流變儀對兩種水溶液進(jìn)行流變學(xué)性能研究,主要分析其流體特性和黏度變化。結(jié)果表明,在較高濃度的條件下,兩種水溶液均呈現(xiàn)出偽塑性流體特性;水溶液的濃度越大,黏度越大;加入BN后,CPE-BN水溶液黏度有所減小。最后,利用納米膜厚測量儀對兩種水溶液進(jìn)行成膜性能研究,主要分析其在不同載荷、濃度和線速度下的成膜能力。結(jié)果表明,CPE和CPE-BN兩種水溶液的成膜能力較好,當(dāng)濃度達(dá)到3%以后,其膜厚變化與濃度關(guān)系不大;隨著載荷的增大,二者的膜厚均有所減小;隨著線速度的增大,膜厚逐漸增大,當(dāng)達(dá)到500mm/s以后,膜厚穩(wěn)定在25nm左右,二者處在薄膜潤滑和邊界潤滑區(qū),同時(shí)伴有混合潤滑狀態(tài)。研究結(jié)果表明CPE和BN兩種水溶性添加劑協(xié)同潤滑效果較好,工業(yè)應(yīng)用前景良好,可作為綠色水基型潤滑添加劑。
[Abstract]:With the sustainable development of resources and the continuous improvement of the concept of environmental protection, green non-polluting water-based lubricating fluids have been more and more favored. However, the film-forming, lubrication and corrosion resistance of water-based lubricating fluids are relatively poor. Therefore, it is necessary to select water-soluble lubricating additive with excellent performance to improve its tribological properties. Dodecanol randomcopolyether. CPE) and triisopropanolamine borate (BN) were used as additives. The tribological properties of CPE and CPE-BN aqueous solutions were studied respectively. Firstly, the friction and wear properties of two aqueous solutions were studied by four-ball test machine, mainly analyzing their anti-friction and anti-wear performance. The stability and extreme pressure properties were analyzed by using 3D white light copolymerization surface topography instrument and X-ray photoelectron spectroscopy analyzer. The results show that both aqueous solutions have good antifriction performance. After adding BN, the antiwear and stability properties of CPE aqueous solution were improved, and the maximum value of PB without biting load was increased by 11.6%. The properties of the aqueous solution of .CPE-BN have been improved due to the formation of chemisorption and chemical reaction films during the friction process. In addition, the rheological properties of two aqueous solutions were studied by rotating rheometer, and the fluid properties and viscosity changes were analyzed. Under the condition of higher concentration, both aqueous solutions exhibit pseudoplastic fluid characteristics. The higher the concentration of aqueous solution, the greater the viscosity. The viscosity of CPE-BN aqueous solution was decreased after adding BN. Finally, the film forming properties of two aqueous solutions were studied by using nanofilm thickness measuring instrument, and the properties of CPE-BN aqueous solution under different loads were mainly analyzed. The results show that the film forming ability of the aqueous solution of CPE-BN and CPE is better. When the concentration reaches 3%, the change of film thickness is not related to the concentration. The film thickness decreases with the increase of load. With the increase of the linear velocity, the film thickness increases gradually. When the film thickness reaches 500 mm / s, the film thickness is stable at about 25 nm, both of them are in the film lubrication and boundary lubrication region. The results show that CPE and BN can be used as green-water based lubricating additives because of their good synergistic lubricating effect and good prospect of industrial application.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH117

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本文編號：1376956