Realization of non-lubricated sliding between polymer gasket and cylinder by using controlling surface mechanical property of material

在圆柱形滑动部件中，如注射器和减震器，需要在不使用润滑剂的情况下减少聚合物垫片和相对刚性的圆柱体之间的摩擦。在这项工作中，我们试图证明这种圆柱形滑动部件无润滑运动的可能性，其中1.高密度等离子体处理提高了垫片表面的弹性模量，2.用PFPE和UV照射对聚合物垫片进行表面氟化，3.我们实验室开发的内部DLC涂层被认为是使用的。因此，我们成功地演示了无润滑塑料注射器(PP筒与热塑性弹性体垫片)的平稳运动，采用1和4。垫片形状的最小设计变化，在满足密封性能的情况下。此外，还建立了实现DLC涂层内部均匀分布的监测技术。

In cylindrical sliding components such as syringe and shock -absorber, technology to decrease friction between a polymeric gasket and relatively rigid cylinder without using lubricants is required. In this work, we tried to show the possibility of non -lubricated motion of such cylindrical sliding components, where 1. Elastic modulus increase of gasket surface with high-density plasma treatment, 2. Surface fluorination of polymeric gasket using PFPE and UV irradiation, and 3. Internal DLC coating, which had been developed in our laboratory, were considered to be employed. As a result, we successfully demonstrated the smooth motion of non-lubricated plastic syringe (PP barrel vs Thermo-plastic elastomer gasket) by employing 1 and 4. Minimum design change of gasket shape, where seal capability was also satisfied. Furthermore, monitoring technique to achieve uniform distribution in internal DLC coating was established.