Journal
JOURNAL OF MATERIALS CHEMISTRY B
Volume 3, Issue 14, Pages 2834-2841Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tb00095e
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Funding
- National Natural Science Foundation of China (NSFC) [21274102, 21304063]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
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Up to now, fabrication of strong and stimuli-responsive supramolecular hydrogels via an easy molecular design and synthesis procedure is still a big challenge. In this work, a series of hydrophobically modified linear polyurethane-urea copolymers and one polyurethane copolymer were prepared via a greatly simplified one-pot approach to investigate the synergistic effect between hydrogen-bonding and hydrophobic effects. FT-IR and various mechanical performance studies show that not only a longer hydrophobic spacer (C-12) but also a stronger hydrogen-bonding unit (urea) is necessary for their synergistic effect to yield high water containing, transparent, stretchy and tough supramolecular hydrogels. Moreover, these supramolecular materials also show nice cyclic shape-memory behaviours which can be realized under mild conditions, e.g. in air and water at room temperature. The noncovalent interaction's synergistic effect and stimuli-responsive character are expected to dramatically expand the design and choice of tough and smart supramolecular hydrogels/materials for biomaterials.
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