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Body Temperature-Triggered Shape-Memory Effect via Toughening Sustainable Poly(propylene carbonate) with Thermoplastic Polyurethane: toward Potential Application of Biomedical Stents
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-14 , DOI: 10.1021/acssuschemeng.9b06080 Bingbing Zeng 1 , Ying Li 2 , Lishen Wang 1 , Yu Zheng 1 , Jiabin Shen 1 , Shaoyun Guo 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-14 , DOI: 10.1021/acssuschemeng.9b06080 Bingbing Zeng 1 , Ying Li 2 , Lishen Wang 1 , Yu Zheng 1 , Jiabin Shen 1 , Shaoyun Guo 1
Affiliation
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Shape-memory polymeric materials triggered by body temperature were fabricated via toughening sustainable poly(propylene carbonate) (PPC) with thermoplastic polyurethane (TPU). With an addition of TPU through melt blending, the ductility of PPC was dramatically enhanced, leading to the increase of shape recoverability but a deterioration of shape fixity. Remarkably, the blend containing 50 wt % TPU (PT50) presented the optimal shape-memory effect (SME) with balanced shape recovery and shape fixation performances because of the formation of the co-continuous structure promoting the synergy between PPC and TPU. Moreover, the PT50 sample exhibited significant improvement in not only the shape recovery ratio (∼95.0% recovery) but also the recovery speed and recovery stress, which enabled it to achieve an excellent SME when applied in practical use. After processed into a spiral-like stent, PT50 still showed a fast response to 37 °C, giving an efficient self-expansion within only 20 s. Besides, the blood and cell compatibility testing results revealed the good biocompatibility of PT50, further demonstrating the great potential of this material for development of biomedical stents.
中文翻译：
通过用热塑性聚氨酯增韧可持续的聚碳酸亚丙酯来触发体温触发的形状记忆效应：对生物医学支架的潜在应用
通过用热塑性聚氨酯（TPU）增韧可持续的聚碳酸亚丙酯（PPC），制造了由体温触发的形状记忆聚合物材料。通过熔融共混添加TPU，PPC的延展性得到显着增强，导致形状恢复性提高，但形状固定性下降。值得注意的是，由于共连续结构的形成促进了PPC和TPU之间的协同作用，因此含有50 wt％TPU（PT50）的共混物具有最佳的形状记忆效应（SME），具有平衡的形状恢复和形状固定性能。此外，PT50样品不仅在形状恢复率（约95.0％恢复率）上显着提高，而且在恢复速度和恢复应力方面也有显着提高，这使其在实际应用中能够获得优异的SME。在加工成螺旋状支架后，PT50仍显示对37°C的快速响应，仅在20 s内即可实现有效的自膨胀。此外，血液和细胞相容性测试结果显示PT50具有良好的生物相容性，进一步证明了该材料在开发生物医学支架方面的巨大潜力。
更新日期：2020-01-15
中文翻译：
通过用热塑性聚氨酯增韧可持续的聚碳酸亚丙酯来触发体温触发的形状记忆效应：对生物医学支架的潜在应用
通过用热塑性聚氨酯（TPU）增韧可持续的聚碳酸亚丙酯（PPC），制造了由体温触发的形状记忆聚合物材料。通过熔融共混添加TPU，PPC的延展性得到显着增强，导致形状恢复性提高，但形状固定性下降。值得注意的是，由于共连续结构的形成促进了PPC和TPU之间的协同作用，因此含有50 wt％TPU（PT50）的共混物具有最佳的形状记忆效应（SME），具有平衡的形状恢复和形状固定性能。此外，PT50样品不仅在形状恢复率（约95.0％恢复率）上显着提高，而且在恢复速度和恢复应力方面也有显着提高，这使其在实际应用中能够获得优异的SME。在加工成螺旋状支架后，PT50仍显示对37°C的快速响应，仅在20 s内即可实现有效的自膨胀。此外，血液和细胞相容性测试结果显示PT50具有良好的生物相容性，进一步证明了该材料在开发生物医学支架方面的巨大潜力。
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