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DOI | 10.1126/science.aar5877 |
Multivalent counterions diminish the lubricity of polyelectrolyte brushes | |
Yu, J.1,2,3; Jackson, N. E.1,2; Xu, X.4; Morgenstern, Y.5; Kaufman, Y.5; Ruths, M.4; de Pablo, J. J.1,2; Tirrell, M.1,2 | |
2018-06-29 | |
发表期刊 | SCIENCE
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ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2018 |
卷号 | 360期号:6396页码:1434-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Singapore; Israel |
英文摘要 | Polyelectrolyte brushes provide wear protection and lubrication in many technical, medical, physiological, and biological applications. Wear resistance and low friction are attributed to counterion osmotic pressure and the hydration layer surrounding the charged polymer segments. However, the presence of multivalent counterions in solution can strongly affect the interchain interactions and structural properties of brush layers. We evaluated the lubrication properties of polystyrene sulfonate brush layers sliding against each other in aqueous solutions containing increasing concentrations of counterions. The presence of multivalent ions (Y3+, Ca2+, Ba2+), even at minute concentrations, markedly increases the friction forces between brush layers owing to electrostatic bridging and brush collapse. Our results suggest that the lubricating properties of polyelectrolyte brushes in multivalent solution are hindered relative to those in monovalent solution. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000436598000070 |
WOS关键词 | LUBRICATION ; CONDENSATION ; FRICTION ; SURFACES ; BEHAVIOR ; FORCES |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/198998 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Chicago, Inst Mol Engn, Chicago, IL 60637 USA; 2.Argonne Natl Lab, Inst Mol Engn, 9700 S Cass Ave, Lemont, IL 60439 USA; 3.Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore; 4.Univ Massachusetts, Dept Chem, Lowell, MA 01854 USA; 5.Ben Gurion Univ Negev, Zuckerberg Inst Water Res, Jacob Blaustein Inst Desert Res, Midreshet Ben Gurion, Israel |
推荐引用方式 GB/T 7714 | Yu, J.,Jackson, N. E.,Xu, X.,et al. Multivalent counterions diminish the lubricity of polyelectrolyte brushes[J]. SCIENCE,2018,360(6396):1434-+. |
APA | Yu, J..,Jackson, N. E..,Xu, X..,Morgenstern, Y..,Kaufman, Y..,...&Tirrell, M..(2018).Multivalent counterions diminish the lubricity of polyelectrolyte brushes.SCIENCE,360(6396),1434-+. |
MLA | Yu, J.,et al."Multivalent counterions diminish the lubricity of polyelectrolyte brushes".SCIENCE 360.6396(2018):1434-+. |
条目包含的文件 | 条目无相关文件。 |
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