本文關(guān)鍵詞： 酯類基礎(chǔ)油 熱氧化 分子結(jié)構(gòu) 拉曼光譜　出處：《分析測試學(xué)報》2017年04期 　論文類型：期刊論文

【摘要】：將DXR激光顯微拉曼光譜儀與Linkam FTIR600控溫臺聯(lián)用,測定了連續(xù)加熱、恒溫氧化過程中三羥甲基丙烷油酸酯(TMPTO)、偏苯三酸三異酸酯(TDTM)、己二酸二異辛酯(DOA)等酯類基礎(chǔ)油的拉曼特征峰的變化規(guī)律,探討了熱氧化過程中酯類油分子結(jié)構(gòu)的變化特點(diǎn)。研究發(fā)現(xiàn),隨著加熱溫度的提高,酯類基礎(chǔ)油的部分拉曼峰的峰位與峰強(qiáng)均發(fā)生了明顯變化;酯類基礎(chǔ)油的甲基與亞甲基的C—H伸縮振動峰及亞甲基的剪式振動峰對溫度很敏感,隨著溫度的升高發(fā)生了不同程度的峰強(qiáng)衰減,冷卻后可基本恢復(fù);C‖O振動峰隨溫度的升高變化不明顯;TMPTO酯類基礎(chǔ)油的C‖C雙鍵伸縮振動峰隨著溫度升高逐漸向高波區(qū)移動冷卻后可恢復(fù),‖C—H和C‖C的伸縮振動峰強(qiáng)冷卻后不能完全恢復(fù);恒溫下隨著氧化時間的延長,TDTM和DOA基礎(chǔ)油的拉曼峰無明顯變化,與TMPTO基礎(chǔ)油的‖C—H、C‖C及—CH2—相關(guān)的拉曼峰呈規(guī)律性衰減。因此可運(yùn)用原位拉曼光譜法對不飽和酯類基礎(chǔ)油中連續(xù)氧化進(jìn)行監(jiān)測。而原位光譜法對飽和酯類油和芳香酯類油高溫連續(xù)氧化過程的監(jiān)測具有一定的局限性。
[Abstract]:The DXR laser micro-Raman spectrometer and Linkam FTIR600 temperature-control station were used to determine the trimethylolpropane oleate (TMP) in the process of continuous heating and isothermal oxidation. The changes of Raman characteristic peaks of TDTM, diisooctyl adipate diisooctyl adipate and so on. The characteristics of molecular structure of ester oil during thermal oxidation were discussed. It was found that the peak position and peak strength of some Raman peaks of ester base oil changed obviously with the increase of heating temperature. The C-H stretching vibration peaks and shear vibration peaks of methylene and methyl ester base oils are sensitive to temperature. With the increase of temperature, the peak intensity attenuates to varying degrees, and can be basically recovered after cooling. The vibrational peak of C + O does not change obviously with the increase of temperature. The C C double bond stretching vibration peak of TMPTO ester base oil can be recovered after moving to the high wave region with the increase of temperature, but the stretching vibration peak of C H and C C can not be fully recovered after cooling. At constant temperature, the Raman peaks of TDTM and DOA base oils have no obvious change with the prolongation of oxidation time, but they are similar to those of TMPTO base oils. The Raman peaks of C-C and -Ch _ 2-related peaks decay regularly. Therefore, the continuous oxidation of unsaturated ester base oils can be monitored by in-situ Raman spectroscopy, while the saturated ester and aromatic esters can be monitored by in-situ spectroscopy. The monitoring of continuous oxidation process at high temperature has some limitations.
【作者單位】： 武漢材料保護(hù)研究所特種表面保護(hù)及應(yīng)用技術(shù)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計劃項(xiàng)目(973)(2013CB632303)
【分類號】：O657.37;TE666
【正文快照】： 酯類合成油具有優(yōu)異的高低溫性能、黏溫性能、熱氧化安定性、潤滑性和低揮發(fā)性等優(yōu)點(diǎn),在眾多領(lǐng)域得到了廣泛應(yīng)用[1-3]。隨著技術(shù)的發(fā)展,機(jī)械潤滑系統(tǒng)要求越來越高,工況越來越苛刻。盡管酯類油的熱氧化穩(wěn)定性好,但長期在高溫下使用,不可避免地發(fā)生熱氧化衰變而影響其有效使用壽，

本文編號：1443672