【作者】 陈莲英；

【导师】 章文贡；

【作者基本信息】 福建师范大学 ， 高分子化学与物理， 2004， 硕士

【摘要】 热塑性弹性体SBS具有较高的拉伸强度、撕裂强度和拉断伸长率，并且还有良好的耐低温性、透气性、独特的抗湿滑性和高弹性，是极好的润滑油增粘剂，能够极好地保持润滑油在高温或低温下的粘度，提高润滑油的润滑性能。 本研究在探讨纳米金属(Cu和W)颗粒制备的基础上，重点着眼于寻求一种优良的表面修饰剂，使纳米金属颗粒能稳定地分散于基础油中，并将具有优良抗磨减摩性能的纳米金属颗粒和SBS进行杂化，得到具有更加优良的抗磨减摩性能的杂化材料。 经检索国内外文献至今还未见有关这方面的报道。 首先，本文利用脉冲激光轰击法连续制备了纳米金属(Cu和W)颗粒，通过紫外-可见吸收光谱、透射电镜、荧光光谱、傅立叶红外光谱和X线衍射等手段探讨几种表面修饰剂对纳米金属(Cu和W)颗粒的作用以及纳米金属(Cu和W)颗粒的结构特性。结果表明： (1)本研究利用脉冲激光轰击法连续制备了纳米金属(Cu和W)颗粒。透射电镜观察表明，纳米金属(Cu和W)颗粒在乙醇中呈球形粒状，直径约为5nm。(2)表面修饰剂能提高纳米金属(Cu和W)颗粒在油性溶剂中的稳定性，在平平加0、十二烷基苯磺酸钠、磷酸二异辛酯和二烷基二硫代磷酸四种表面修饰剂中，平平加0的效果最好。(3)紫外-可见吸收光谱和荧光光谱分析表明纳米金属乙醇溶胶具有较强的吸收和发射。(4)傅立叶红外光谱分析表明，纳米金属(Cu和W)颗粒很容易与乙醇羟基中的氧原子作用，显著减弱了乙醇羟基之间的缔合程度，C-H伸缩振动和面内弯曲振动均受到牵制，键长变长，振动吸收频率降低。(5)X射线衍射分析说明所合成的纳米金属(Cu和W)颗粒呈晶相，且其晶粒细小，与透射电镜结果相符。 其次，本文采用共混方法合成了纳米金属(Cu和W)／SBS杂化材料，通过紫外一可见吸收光谱、透射电镜、荧光光谱、傅立叶红外光谱和热重一差热量热分析等手段探讨纳米金属(Cu和W)/SBS杂化材料的结构特性。结果表明，杂化材料中纳米金属(Cu和W)颗粒仍呈球形粒状，大小在5一2OI’un之间，大部分在巧nrn左右，SBS中C=C键与纳米金属(Cu和W)颗粒之间的相互作用使杂化材料的玻璃化转变温度和耐热性能较SBS都有所提高。SBS链段与纳米金属(Cu和w)颗粒之间的作用可有效阻止纳米金属(Cu和W)颗粒尺寸的增大。 最后，本文对纳米金属(Cu和W)颗粒和纳米金属(Cu和W)/SBS杂化材料作为润滑油添加剂的抗磨减摩性能进行了研究，发现它们作为润滑油添加剂能极好地提高基础油的抗磨减摩性能，是新一代新型的润滑油添加剂。本研究获得的结果可为进一步的应用研究奠定基础。更多还原

【Abstract】 The thermoplastic elastomer-SBS possesses superior tensile strength, tearing strength and tensile extensibility, and it also possesses good resistance to subzero, air-conductivity, distinctive moisture and skid resistance and long-range elasticity, it is a kind of good keying agent of luboil, it can keep the viscosity of luboil under the high or low temperature and increase the lubricating property of luboil.Our research probe into the preparation of nano-metal(copper and tungsten), we focal point is to seek a kind of excellent surface-modification agent, and the surface-modification agent can make the nano-metal particles easily disperse in the oil. We also prepare nano-metal/SBS hybrid. Searching literature,we did not find a report about nano-metal/SBS hybrid.First of all, in this paper the nano-metal(copper and tungsten)were continuously prepared by pulsed laser ablation. The effect of the surface-modification agent on the nano-metal and the structural property of nano-metal were discussed by UV-Vis, TEM, Fluorescence, FT-IR and XPS. It was showed that the nano-metal(copper and tungsten) particles in ethanol were in the shape of sphere, and the diameter were about 5 nm. It was cncluded that, with the use of the surfactant Peregal-O, SDBS, HA and DDP, the nano-metal(copper and tungsten) particles would more steady disperse in oily solvent, the effect of the surfactant Peregal-O is best. The results ofthe UV-Vis and Fluorescence showed that the nano-metal/ethanol sol have strong absorption peaks and strong emitting fluorescence peaks. It was found through FT-IR that the nano-metal(copper and tungsten) particles are very easy to band with oxygen atom of ethanol, the degree of association of the O-H of ethanol becomes weaker, the flexible vibration and the flection vibration of C-H are affected, the bond distence becomes longer, the frequency of vibration absorption becomes lower. XRD results showed that the nano-metal(copper and tungsten) particles present crystal phase, and the grains were extenuation, this result are correspond with that of TEM.Then, in this paper nano-metal(copper and tungsten) /SBS hybrid material were obtained by blending method, the structural property of nano-metal(copper and tungsten) /SBS hybrid material were discussed by UV-Vis, TEM, Fluorescence, FT-IR and TG-DTA. The results shown that the nano-metal(copper and tungsten) particles in hybrid were still in the shape of sphere, and the diameter were,about 5~20nm,most of them were about 15 nm. The glass-transition temperature and the heat resisting property of the hybrid material were increased because of the interaction between the key of C=C and the nano-metal(copper and tungsten) particles. The interaction between the SBS segmer and the nano-metal(copper and tungsten) particles can effectively prohibit the diameter of the nano-metal(copper and tungsten) particles.At last, in this paper we studied the tribology property of the nano-metal(copper and tungsten) particles and the nano-metal(copper and tungsten) /SBS hybrid material. We found that they have good tribology property, and they are a kind of newfashioned oil dope. And this paper will make a good foundation for future application research.更多还原