State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China.
Carbohydr Polym. 2013 Jul 25;96(2):522-7. doi: 10.1016/j.carbpol.2013.04.026. Epub 2013 Apr 17.
A novel biological friendly shape memory polymer (SMP) based on ethyl cellulose (EC) and polycaprolactone (PCL) was prepared. The network structure of the polymer was formed by linear EC backbones which were linked by grafted PCL chains, and the results showed outstanding mechanical strength and shape memory property of this polymer. The tensile modulus varied from 104.9 to 373.4 MPa while the tensile strength ranged from 155.4 to 323.6 MPa. And the elongations at break were all above 621%. The shape memory switching temperature could be modulated to 37.2°C by decreasing the chain length of graft PCL. As EC and PCL are both biodegradable and biocompatible materials, this new polymer has potential application in biomedical field, like biomedical suture, which would be further studied in the future.
一种新型的生物友好型形状记忆聚合物（SMP），以乙基纤维素（EC）和聚己内酯（PCL）为基础材料制备而成。该聚合物的网络结构由线性 EC 主链组成，通过接枝的 PCL 链连接，其结果显示了该聚合物具有优异的机械强度和形状记忆性能。拉伸模量在 104.9 至 373.4 MPa 之间变化，拉伸强度在 155.4 至 323.6 MPa 之间变化，断裂伸长率均在 621%以上。通过降低接枝 PCL 的链长，可以将形状记忆切换温度调节至 37.2°C。由于 EC 和 PCL 均为可生物降解和生物相容的材料，这种新型聚合物在生物医学领域具有潜在的应用，例如生物医学缝线，这将在未来进一步研究。
