Shape Memory Polyurethanes Based on Zwitterionic Hard Segments
AbstractThis work aimed at elucidating the influence of zwitterionic hard segments on the structures and properties of shape memory polyurethanes (SMPUs). A series of zwitterionic SMPUs was successfully prepared with N-methyldiethanolamine (MDEA), 1,3-propanesultone (1,3-PS), 1,6-hexamethylene diisocyanate (HDI) and polyethylene glycol (PEG6000). The influence of MDEA-PS-based zwitterionic hard segment on structure, morphology, thermal property, shape memory property and cytocompatibility were systematically investigated. The results demonstrated that the PEG-based zwitterionic SMPUs (PEG-ZSMPUs) formed phase separation structure consisting of crystalline soft phase and amorphous hard phase. The MDEA-PS zwitterionic segments showed a tendency to form ionic clusters in hard segments, which served as reinforced net points. Shape memory analysis showed that zwitterionic PEG-ZSMPUs containing a high content of zwitterionic segments had thermal-induced shape memory effects. Finally, cytotoxic assays demonstrated that MDEA-PS zwitterionic segment improved the biocompatibility of PEG-ZSMPUs. The zwitterionic PEG-ZSMPUs could thus have a promising application in smart biomedical fields. View Full-Text
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Fu, S.; Ren, H.; Ge, Z.; Zhuo, H.; Chen, S. Shape Memory Polyurethanes Based on Zwitterionic Hard Segments. Polymers 2017, 9, 465.
Fu S, Ren H, Ge Z, Zhuo H, Chen S. Shape Memory Polyurethanes Based on Zwitterionic Hard Segments. Polymers. 2017; 9(10):465.Chicago/Turabian Style
Fu, Shuqin; Ren, Huanhuan; Ge, Zaochuan; Zhuo, Haitao; Chen, Shaojun. 2017. "Shape Memory Polyurethanes Based on Zwitterionic Hard Segments." Polymers 9, no. 10: 465.
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