液晶态被认为是一类介于固体和液体之间的物态，液晶态分子排列一维或二维长程有序。在垂直于表面的方向，液晶表现固体特性，阻止表面间的直接接触，固而具有较强的承载能力，而在滑动剪切方向，液晶表现为低粘度的液体，可有效地降低摩擦系数。本文对液晶化合物作为润滑剂及润滑添加剂的应用作出了简要评价。 Liquid crystal state is considered to be a class of objects between the solid and liquid state, liquid crystal molecules arranged in one-dimensional or two-dimensional long-range order. In the direction perpendicular to the surface of the liquid crystal display solid properties, to prevent direct contact between the surface, solid and has a strong carrying capacity, and in the sliding shear direction, liquid crystal showed low viscosity liquid, which can effectively reduce the friction coefficient. This article briefly reviews the use of liquid crystal compounds as lubricants and lubricant additives.