论文信息 - Water-driven programmable polyurethane shape memory polymer: Demonstration and mechanism

Water-driven programmable polyurethane shape memory polymer: Demonstration and mechanism

We demonstrate the new features of a polyurethane shape memory polymer: water-driven actuation and recovery in sequence (i.e., programmable). Hydrogen bonding is identified as the reason behind these features. In addition, the absorbed water is quantitatively separated into two parts, namely, the free water and bound water. Their individual contribution on the glass transition temperature is identified.

[1] Yong-Chan Chung,et al. Structure and Thermomechanical Properties of Polyurethane Block Copolymers with Shape Memory Effect , 2001 .

[2] M. Wagner,et al. Development of a polymer stent with shape memory effect as a drug delivery system , 2003, Journal of materials science. Materials in medicine.

[3] Robert Langer,et al. AB-polymer networks based on oligo(epsilon-caprolactone) segments showing shape-memory properties. , 2001, Proceedings of the National Academy of Sciences of the United States of America.

[4] L. Yahia,et al. Cold hibernated elastic memory foams for endovascular interventions. , 2003, Biomaterials.

[5] Wei Min Huang,et al. On the effects of moisture in a polyurethane shape memory polymer , 2004 .

[6] R. Langer,et al. Biodegradable, Elastic Shape-Memory Polymers for Potential Biomedical Applications , 2002, Science.