聚烯烃材料因其卓越的性能和较低的价格广泛应用于工农业、医疗卫生、军事、日常生活等领域。为了拓展聚烯烃材料的应用范围,表面功能化聚烯烃、聚烯烃与其他材料的共混物以及聚烯烃/无机纳米复合材料等得到了发展,并成为该领域的研究热点。原子力显微镜(AFM)是利用一个极为尖锐的针尖与样品间的相互作用力进行材料表面的形貌、物理和化学信息探测的一种技术,它在上述聚烯烃研究中发挥着重要作用。表面粗糙度是聚烯烃材料表面功能化研究中的重要参数之一,AFM技术则能够给出准确的表面粗糙度信息。由于AFM技术能够直观地观察各组分的混合状态及相分离情况,因此AFM技术成为聚烯烃与其他材料共混研究的重要手段之一。此外,AFM是一种非常有效的微纳米结构形貌的表征方法,在聚烯烃的结晶研究方面也得到了应用。本文简单介绍了AFM表面形貌观测的工作原理和工作模式,主要阐述AFM在聚烯烃材料研究中的三个主要应用:材料表面粗糙度、共混相分离以及结晶研究。 Polyolefin materials are widely used in industry, agriculture, healthcare, military, daily life and other fields because of their superior performance and lower price. In order to expand the application range of polyolefin materials, surface functionalized polyolefins, blends of polyolefins and other materials as well as polyolefin / inorganic nanocomposites have been developed and become the hotspot in this field. Atomic Force Microscopy (AFM) is a technique that uses a very sharp tip-sample-to-sample interaction force to probe the topography, physical and chemical information of a material’s surface and plays an important role in the polyolefins research described above. Surface roughness is one of the most important parameters in the functionalization of polyolefin materials. AFM technology can provide accurate surface roughness information. As AFM technology can intuitively observe the mixed state of each component and phase separation, AFM technology has become one of the important methods for the blending of polyolefins and other materials. In addition, AFM is a very effective method to characterize the morphology of micro-nano structures and has also been applied in the crystallization of polyolefins. This paper briefly introduces the working principle and working mode of AFM surface morphology observation. It mainly elaborates three main applications of AFM in the research of polyolefin materials: surface roughness of materials, blending phase separation and crystallization research.