| 高分子 Vol.63 No.5 |
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特集
备受注目的分子摩擦学 |
| 展望 |
| 浓厚聚合物刷子的特异润滑性 | 榊原圭太，迁井敬亘 |
| <Abstract> 原子间力显微镜（AFM）及表面间力测定装置（SFA）的低负荷精密摩擦力测定结果显示出浓厚聚合物刷子和准稀薄聚合物刷子的明显的特性差异。本文介绍了两个对接的聚合物刷子的摩擦学特性及新型摩擦学材料. Keywords: Polymer Brush / Tribology / Friction / Bottle-Brush / Cellulose Nanofiber / Bio-Compatibility |
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| 人工关节中的高分子材料摩擦学 | 泽江义则 |
| <Abstract> 超高分子量聚乙烯广泛地应用在人工关节的摩擦接触面的材料,但因摩擦所发生的聚乙烯摩擦粉的因素,影响其人工关节的寿命.本文介绍了生物体内摩擦损耗粉的产生机理及提高耐磨性的几种方法的研究进展. Keywords: Joint Prosthesis / UHMWPE / Wear / Wear Particles / Osteolysis / Cross-Linked PE / Oxidative Degradation |
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| 关于最近的硬驱中润滑剂Disk-to-Head转移的研究 | Paul H. KASAI |
| <Abstract> The lubricant layer atop the carbon overcoat on topical magnetic hard disks comprises a sub-mono molecular film and essentially all the lubricant molecular chains are bound to the carbon layer by a bona fide chemical bond. The disk-to-head lubricant transfer thus should not occur. The transfer still occurs. Severe and frequent disk/head interactions result in formation of Lewis acid centers of extreme acidity on the alumina surface of the slider. The observed transfer is due to mobile fragments generated by occurrences of multiple fragmentation reactions catalyzed by such centers on individual molecular chains. |
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| 从高分子链的广度去考虑粘合与摩擦现象: 理论及模拟解析 | 森田裕史 |
| <Abstract> 用实验的方法得不到的信息,通常可通过模拟的手段来获取更多的有用的信息.尤其是粘合与摩擦现象,因其为界面现象,光通过实验能获取的信息量是有限的,故模拟是至关重要的一种解析手段.本文介绍了这些使用理论模拟的方法对粘合与摩擦现象的研究进展. Keywords: Coarse-Grained Simulations / Polymer Chain / OCTA / Adhesion / Dynamics of Contact Line |
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| 话题 |
| 通过FM-AFM观测到的界面液体的组织结构 | 大西 洋 |
| <Abstract> Frequency-modulation atomic force microscopy (FM-AFM) is a promising tool to observe the solid topography and the liquid structure at interfaces as well. The cantilever with a tip is resonantly oscillated and the shift of the resonance frequency represents liquid-induced force pushing or pulling the tip. Selected results observed on hydrophilic thiolate molecular monolayers are described. The observed, two-dimensional distributions of tip-surface force were sensitive to the composition of the solids and liquids, while insensitive to tips of different apex radii. This suggests that the observed force distribution was not much affected by the presence of the tip above the interface. Keywords: Liquid-Solid Interfaces / Liquid Structure / Thiolate Monolayers / Atomic Force Microscopy |
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| 柔软润滑界面的制备及低摩擦损耗的实现 | 平山朋子 |
| <Abstract> b Tribologyb is one of the important engineering fields focusing on friction, wear and lubrication in sliding surfaces in machines. Soft boundary layer reducing friction under boundary lubrication has been recently attracting much attention, and new analytical approaches and developments of the layers have been proposed using interdisciplinary knowledge. Authors proposed to apply neutron reflectometry to solid-liquid interface to analyze the structure of soft boundary layer formed by oiliness additives. Fitting operation between the experimental and theoretical reflectivity profiles revealed that the oiliness additive layers on metal surfaces were very thin, less than several nanometers. To achieve much lower friction surfaces, the authors developed an oil-compatible concentrated polymer brush layer as a new soft boundary layer. Macro-tribological tests showed that the friction coefficients between the surfaces with polymer brushes under oil lubrication were less than 0.01, while those between the bare surfaces were larger than 0.1. Further development of soft boundary layers is a promising way for excellent tribological surfaces in near future. Keywords: Tribology / Lubrication / Soft Boundary Layer / Low-Friction / Lubricating Oil / Additive |
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| “观测”能通”知晓”! 对摩擦界面的直接观测 | 佐藤隆昭, 石田 忠, 藤田博之 |
| <Abstract> The observation of nanoscale deformation in real time is a significant step toward understanding the mechanisms of friction and lubrication. Our micromachine combined with a TEM experimental setup allowed us to measure the deformation, force and cross-sectional area of the actual contact area. We have compared observations of several materials such as Ag, DLC and Si. Keywords: Nanotribology / Friction / TEM |
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| Polymer Science and I: A Personal Account |
| 高分子合成中的一些成功体验 | 浪越 毅 |
| <Abstract> In the beginning of my studies I felt incompetent. Then success in research taught me the pleasure of research in polymer chemistry. I was able to change myself from this successful experience. I hope that it will continue to do so in the future and bring me a lot of success. |
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| 高分子科学最新进展 |
| Cylindrical Polymer Brushes as Shaped Molecular Nanoobjects | Yongming CHEN, Yechao YAN |
| <Abstract> As one kind of unimolecular nanoobjects with controlled shape from sphere to cylinder, molecular bottlebrush has a well-defined structure and tunable hierarchical functionalities. In this article, controlled synthesis of cylindrical polymer brushes and its application to fabricate unimolecular nanoobjects are described. Keywords: Cylindrical Molecular Brushes / Nanoobjects / Polymer Synthesis |
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