Dynamic hydrogen bonding induced hygroscopicity of ionogel enabling lubricating regulation | |
Qihua Wang; Pengrui Cao; Yu Gao; Jing Yang; Zhibin Lu; Tingmei Wang; Yaoming Zhang | |
刊名 | Materials Today Chemistry |
2023-10-14 | |
期号 | 34页码:101762 |
关键词 | Water-induced stiffening Ionogel Stimuli-responsive Friction 3D printing |
英文摘要 | Stimuli-responsive hydrogels with tunable lubrication have aroused attention for the development intelligent lubricating materials. However, the limited bearing capacity and the decaying of lubrication induced by water evaporation have hindered the broad application of hydrogels in the practical ffelds. Here, we present an ionogel composite that combines the hygroscopic ionogel with 3D printed polymer substrates to achieve a humidityresponsive friction behavior enabled by dynamic hydrogen bonding (HB). The ionogel composed of the ionic liquid (IL) 1-Ethyl-3-methylimidazolium acetate ([EMIM][OAc]) and poly(N-isopropylacrylamide) (PNIPAM), exhibited the moisture absorption induced stiffening and swelling, which is attributed to the reconffguration of the polymer network through dynamic HB. The material shows a large change in tension strength (as much as 3.8 times) and Young’s modulus (as much as 83 times). Moreover, the hygroscopic ionogel composites demonstrate a stimuli-responsive friction behavior, with the coefffcient of the friction (COF varying from 0.07 to 0.70) depending on relative humidity, hygroscopic time, and 3D printing patterns. This behavior can be attributed to the combined effects of modulus and roughness changes. Our strategy introduces the hygroscopic IL for the stimuli-responsive polymer for the realizing of water-induced stiffening and provides a design to access the smart material with lubrication regulation. |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.licp.cn/handle/362003/30635] |
专题 | 兰州化学物理研究所_固体润滑国家重点实验室 |
通讯作者 | Qihua Wang; Yaoming Zhang |
作者单位 | 1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences 2.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 3.Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences |
推荐引用方式 GB/T 7714 | Qihua Wang,Pengrui Cao,Yu Gao,et al. Dynamic hydrogen bonding induced hygroscopicity of ionogel enabling lubricating regulation[J]. Materials Today Chemistry,2023(34):101762. |
APA | Qihua Wang.,Pengrui Cao.,Yu Gao.,Jing Yang.,Zhibin Lu.,...&Yaoming Zhang.(2023).Dynamic hydrogen bonding induced hygroscopicity of ionogel enabling lubricating regulation.Materials Today Chemistry(34),101762. |
MLA | Qihua Wang,et al."Dynamic hydrogen bonding induced hygroscopicity of ionogel enabling lubricating regulation".Materials Today Chemistry .34(2023):101762. |
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