Abstract Recently, concentrated polymer brushes (CPBs) have attracted much attention as potential tribomaterials showing an ultralow friction coefficient (e.g., 10−4 in a microtribological analysis). In this study, a homemade apparatus modeling reciprocating seals was developed, which consisted of an inner steel rod and an outer steel ring with a narrow clearance less than several tens of micrometers. A few-micrometer-thick CPB film of poly(methyl methacrylate) well-swollen with an ionic liquid was prepared on each steel surface, and the impact of applying the CPB film to the clearance of reciprocating seals was examined by measuring the leakage rate of a fluid and the friction coefficient in reciprocating motion. The results showed that the CPB film narrowed the clearance between the two steel surfaces, which improved its sealing performance. In addition, the CPB film yielded a quite low friction coefficient (e.g., 10−3), which assured its smooth motion with small energy loss.

中文翻译：

---

浓缩聚合物刷作为往复密封材料，可实现低泄漏和低摩擦

摘要 最近，浓缩聚合物刷（CPBs）作为潜在的摩擦材料显示出超低摩擦系数（例如，在微摩擦学分析中为 10-4）引起了很多关注。在这项研究中，开发了一种自制的往复式密封建模装置，它由一个内钢棒和一个间隙小于几十微米的外钢环组成。在每个钢材表面制备了几微米厚的离子液体溶胀的聚甲基丙烯酸甲酯 CPB 膜，通过测量 CPB 膜对往复密封件间隙的影响流体和往复运动的摩擦系数。结果表明，CPB薄膜缩小了两钢表面之间的间隙，提高了其密封性能。