CAJ | 학술논문

以Na2B4O7·10H2O和La(NO3)3·6H2O作原料,油酸作改性剂,采用水热法制备了硼酸镧纳米棒。利用X-衍射仪、FT-IR光谱仪、扫描电镜及能谱仪对其结构进行了表征,采用四球摩擦试验机考察了其在植物油中的抗磨减摩性能,利用扫描电镜观察了钢球表面磨斑的形貌,X射线光电子能谱测定了磨斑的元素组成。结果表明,硼酸镧呈纳米棒结构,其直径为50 nm、长达500 nm。硼酸镧纳米棒能显著提高植物油的抗磨、减摩性能,当添加剂的含量为1wt．%时,植物油的抗磨、减摩性能达到最佳。 XPS分析结果表明,在钢球表面形成了一层含油酸的吸附膜和一层含Fe2 O3、B2 O3和La2 O3等物质的润滑膜,这种润滑膜起到了良好的润滑作用。
이Na2B4O7·10H2O화La(NO3)3·6H2O작원료,유산작개성제,채용수열법제비료붕산란납미봉。이용X-연사의、FT-IR광보의、소묘전경급능보의대기결구진행료표정,채용사구마찰시험궤고찰료기재식물유중적항마감마성능,이용소묘전경관찰료강구표면마반적형모,X사선광전자능보측정료마반적원소조성。결과표명,붕산란정납미봉결구,기직경위50 nm、장체500 nm。붕산란납미봉능현저제고식물유적항마、감마성능,당첨가제적함량위1wt．%시,식물유적항마、감마성능체도최가。 XPS분석결과표명,재강구표면형성료일층함유산적흡부막화일층함Fe2 O3、B2 O3화La2 O3등물질적윤활막,저충윤활막기도료량호적윤활작용。
Lanthanum borate nanorods were prepared via hydrothermal method using Na2B4O7·10H2O and La(NO3)3·6H2O as raw materials,and oleic acid as the modifying agent. The microstructure of as-prepared samples was characterized by X-ray diffraction (XRD),Fourier transform infrared spectrometry(FT-IR),scanning electron microscope(SEM)and energy-dispersive X-ray spec-trometer(EDS). In the meantime,friction reducing and anti-wear properties of lanthanum borate as lubricant additives in vegetable oil were evaluated with a four-ball friction and wear tester. The morphology as well as elemental composition of worn steel surfaces were investigated by SEM and EDS. Results showed that as-prepared lanthanum borate displayed nanorod morphology with diameters of 50 nm and lengths up to 500 nm. Moreover,the lanthanum borate nanorods could obviously improve the anti-wear and frictiong re-ducing properties of vegetable oil. The optimal anti-wear and friction reducing abilities were obtained at an additive content of 1 wt.%. XPS analysis showed that the formation of a lubrication film mainly composed of the oxides of iron,boron and lanthanum as well as the formation of an adsorption film of oleic acid on the rubbing surfaces,which provided the vegetable oil with good lubrica-ting properties.