Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 39, Issue 1, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201700361
Keywords
catenane; intercomponent hydrogen bonding; mechanically adaptive; polymer gel
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Funding
- National Basic Research Program [2013CB834502]
- National Natural Science Foundation of China [91527301, 21434005, 51403184, 11302190, 11432012]
- State Key Laboratory of Supramolecular Structure and Materials [sklssm201611]
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A new strategy is introduced to prepare an adaptive polymer gel that has a unique adaptability in response to environmental stimuli. This gel is prepared by the thiol-ene click reaction between a bisvinyl [2]catenane and a poly(ethylene glycol) derivative containing multiple thiol groups. The catenane crosslinker is responsive to external stimuli due to the existence of intercomponent hydrogen bonding (IHB). The strong IHB restricts the rotation and movement of the crosslinker, giving it a rigid feature; however, the crosslinker becomes flexible when the IHB is destroyed. In consequence, the resulting gel can be reversibly switched between tough and soft states under stimulations.
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