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State transition of macroscopic supramolecular hydrogel by the host-guest coverage effect |
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| Authors: | Yizhe Liu Yang Wu Kai Feng Hui Liu Chenxi Qin Meirong Cai Xiaowei Pei Feng Zhou |
| Affiliation: | 1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, China
Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai, Yantai, Shandong, China Contribution: Data curation (lead), Formal analysis (lead), Methodology (equal), Writing - original draft (lead), Writing - review & editing (lead);2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, China;3. Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai, Yantai, Shandong, China Contribution: Formal analysis (equal), ?Investigation (equal), Writing - review & editing (equal);4. School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, Shandong, China Contribution: Funding acquisition (equal), Methodology (equal), Writing - review & editing (supporting);5. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, China Contribution: Data curation (equal), Methodology (equal);6. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, China Contribution: Data curation (equal), Methodology (supporting), Writing - review & editing (supporting);7. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, China Contribution: Funding acquisition (equal), Methodology (supporting), Writing - review & editing (equal) |
| Abstract: | In this work, a hydrophobic guest monomer containing adamant end-group was synthesized and introduced into the acrylamide hydrogel system to prepare macroscopic guest hydrogel. The swelling, transparency, and mechanical properties of the guest hydrogels can be significantly changed by soaking the guest hydrogel into hydrophilic cyclodextrin solution because the hydrophobic guest groups were recognized and covered by the hydrophilic host molecules. In addition, the surface lubrication property could be adjusted by changing the proportion of acrylamide and adamantane monomers in the hydrogel system. More importantly, cyclodextrin can bind with adamantane through host-guest interactions, enabling the adjustment of the hydrophilicity/hydrophobicity properties of the hydrogel system. By controlling the assembly time, the hydrogel with different lubrication behaviors can be obtained. The controllable surface friction that this specific binding of host-guest interaction has broad application prospects in intelligent device, bionic lubrication and other fields. |
| Keywords: | β-Cyclodextrin aqueous lubrication host-guest interaction state transition supramolecular hydrogel |