| Correlation between conformation change of polyelectrolyte brushes and lubrication | |
| Department | 固体润滑国家重点实验室 |
Li B(李斌)1,3 ; Yu B(于波)1; Wang XL(王晓龙)1; Feng Guo2; Zhou F(周峰)1; Yu B(于波)
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| 2015 | |
| Source Publication | Chinese Journal of Polymer Science
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| ISSN | 0256-7679 |
| Volume | 33Issue:1Pages:163-172 |
| Abstract | We directly monitor the absolute separation profiles that function as film thickness between a single glass disk and the charged polyelectrolyte brushes decorated steel slider in water using a home-made slider-on-disk apparatus, which reflects the structural conformation variations and interactions of polymer brushes under externally applied pressure, in addition to probing the relative variation of friction forces under different applied loads and sliding velocities. We find that the polyelectrolyte brushes modified surfaces can sustain high pressure and have extremely low friction coefficients(around 0.006 at pressures of 0.13 MPa; 0.5-0.6 without brushes). The water-lubrication characteristics are correlated to the structural conformation changes of the polyelectrolyte brushes that are mainly governed by electrostatic interactions and the osmotic pressure of counterions inside the polymer chains, which can be used to support and distribute the normal pressure. The apparent thickness of the brush decreases with the increase of loading forces, an increase in the ionic strength causes the polymer chains collapse, and the friction forces increase. This fundamental research is of great importance to understand the mechanical and structural properties of polyelectrolyte brushes and their influences on the tribological behaviors, and helps to design friction/lubrication-controlled surface/interface by taking advantage of polyelectrolyte brushes. |
| Keyword | Polyelectrolyte Brush Lubrication Conformation Electrolyte |
| Subject Area | 材料科学与物理化学 |
| DOI | 10.1007/s10118-015-1564-8 |
| Funding Organization | the National Natural Science Foundation of China (Nos. 21125316;51305428;51335010);Key Research Program of CAS (KJZD-EW-M01) |
| If | 1.811 |
| Language | 英语 |
| Funding Project | 材料表面与界面行为研究组 |
| compositor | 第一作者单位 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/18679 |
| Collection | 固体润滑国家重点实验室（LSL） |
| Corresponding Author | Feng Guo; Yu B(于波) |
| Affiliation | 1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China 2.School of Mechanical Engineering, Qingdao Technological University, Qingdao, 266033, China 3.University of Chinese Academy of Sciences, Beijing, 100049, China |
| Recommended Citation GB/T 7714 | Li B,Yu B,Wang XL,et al. Correlation between conformation change of polyelectrolyte brushes and lubrication[J]. Chinese Journal of Polymer Science,2015,33(1):163-172. |
| APA | Li B,Yu B,Wang XL,Feng Guo,Zhou F,&于波.(2015).Correlation between conformation change of polyelectrolyte brushes and lubrication.Chinese Journal of Polymer Science,33(1),163-172. |
| MLA | Li B,et al."Correlation between conformation change of polyelectrolyte brushes and lubrication".Chinese Journal of Polymer Science 33.1(2015):163-172. |
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| art%3A10.1007%2Fs101（999KB） | 期刊论文 | 作者接受稿 | 开放获取 | ODC PDDL | View Application Full Text | |
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