CAJ | 학술논문

发动机燃油碳烟颗粒不可避免地会进入润滑油中，引起润滑油黏度的增长，从而影响发动机的润滑特性和使用性能。借助傅里叶红外光谱仪、X射线光电子能谱仪、全自动微孔物理吸附和化学吸附分析仪、光学法接触角/界面张力仪、Zeta电位仪等仪器，对比分析了生物质燃油碳烟颗粒（BS）和0#柴油碳烟颗粒（DS）的表面特性，探讨了BS和DS对液体石蜡（LP，润滑油基础油的模拟物）和碳烟分散体系的黏度的影响及碳烟表面特性对黏度的影响机理。结果表明，40℃时油品的相对黏度随碳烟浓度的增加呈指数函数增加，并且相同碳烟浓度下DS污染的油品相对黏度更大，高浓度碳烟污染的油品呈明显剪切稀化行为，DS污染的LP的黏度受剪切转速的影响更大。BS和DS表面主要元素是碳和氧，且BS氧含量高于DS，表面均带有一些含氧官能团。表面特性分析显示，DS的比表面积大于BS，表面能高于BS，亲油性弱于BS，致使DS在LP中比BS更易团聚成大颗粒，这是DS对润滑油黏度的影响大于BS的主要原因。
발동궤연유탄연과립불가피면지회진입윤활유중，인기윤활유점도적증장，종이영향발동궤적윤활특성화사용성능。차조부리협홍외광보의、X사선광전자능보의、전자동미공물리흡부화화학흡부분석의、광학법접촉각/계면장력의、Zeta전위의등의기，대비분석료생물질연유탄연과립（BS）화0#시유탄연과립（DS）적표면특성，탐토료BS화DS대액체석사（LP，윤활유기출유적모의물）화탄연분산체계적점도적영향급탄연표면특성대점도적영향궤리。결과표명，40℃시유품적상대점도수탄연농도적증가정지수함수증가，병차상동탄연농도하DS오염적유품상대점도경대，고농도탄연오염적유품정명현전절희화행위，DS오염적LP적점도수전절전속적영향경대。BS화DS표면주요원소시탄화양，차BS양함량고우DS，표면균대유일사함양관능단。표면특성분석현시，DS적비표면적대우BS，표면능고우BS，친유성약우BS，치사DS재LP중비BS경역단취성대과립，저시DS대윤활유점도적영향대우BS적주요원인。
It is inevitable for the soot particles from engine fuel to contaminate the lubricating oil, which may increase the viscosity of lubricating oil, and consequently influence the lubricity and usability of engine. In this paper, the surface properties of biomass fuel soot (BS) and diesel soot (DS) were contrastively investigated by means of Fourier infrared spectrometer, X-ray photoelectron spectroscopy, full-automatic micropore physisorption and chemisorption analyzer, optical contact angle/interface tension meter and Zeta potentiostat in order to study the effect of BS and DS particles on viscosity of liquid paraffin (LP, simulant of base oil for lubricating oil), and discuss the mechanism of influence of soot surface properties on the viscosity. Results showed that the relative viscosity increased by exponential function with increasing soot content at 40℃. The relative viscosity of oil contaminated by DS was higher than that of BS in case of the same soot contents. The oil contaminated with high concentration soot had the advantage of clearly identified shear thinning behavior, which was more severely in LP contaminated by DS. The main surface elements of BS and DS were carbon and oxygen. The surface oxygen content of DS was less than that of BS. There were some O-containing functional groups on the surfaces of BS and DS. The surface property analysis showed that the specific surface area and the surface energy of DS were higher than those of BS. The lipophilicity of DS was less than that of BS. The DS was apt to agglomerate into larger agglomeration particles in LP, which was the main reason for the fact of DS affecting LP viscosity more severely compared with BS.