Journal
RSC ADVANCES
Volume 3, Issue 19, Pages 7048-7056Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra00091e
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Funding
- National Basic Research Program of China (973 Program) [2012CB933600]
- National Natural Science Foundation of China [50773065, 30970723, 51173150]
- Research Fund for the Doctoral Program of Higher Education of China [20120184110029]
- Fundamental Research Funds for The Central Universities [SWJTU11ZT10]
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We have developed a simple and controllable strategy to synthesize a triple-shape memory supermolecular composite (SMPU-INCh-n) through H-bonding interactions between a polymer and mesogenic units. The polymer is shape memory polyurethane (SMPU) with carboxyl groups; the mesogenic unit, named as cholesteryl isonicotinate (INCh), is a liquid crystal compound with an electron-rich pyridine ring. The H-bonding interactions between carboxyl and pyridine ring are proved by FT-IR spectroscopic analysis and H-1 solid-state NMR. The introducing of INChs promotes the bonded PU segments to change into glassy form by restraining the movement of polymer chains, which is responsible for the triple-shape memory property. Therefore, the composite presents excellent triple-shape effect, and may be of great potential for applications in the biomedical field.
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