Composites of Nano-hydroxyapatite and Poly（ε-caprolactone） Composite Fibers by Electrospinning

用水热法合成的棒状纳米羟基磷灰石（nHA）,引发ε-己内酯（ε-CL）开环聚合得到nHA-PCL复合材料。用静电纺丝法分别制备了聚己内酯（PCL）、nHA/PCL共混材料和nHA-PCL复合材料的3种电纺纤维膜。通过FT-IR、DSC、SEM、TGA和拉伸试验机表征了样品的结构、热性能和力学性能。结果表明：nHA-PCL电纺膜的结晶性能优于nHA/PCL材料,且热稳定性和力学性能都优于其他两种膜,nHA-PCL电纺膜的完全分解温度为420°C,拉伸强度和断裂伸长率分别达到28.2MPa和55.6%。3种膜的纤维直径均小于500 nm,nHA-PCL电纺膜的纤维表面比较粗糙。在人体仿生液中诱导矿化4 d后,nHA-PCL电纺膜纤维表面出现磷灰石沉积,而纯PCL和共混nHA/PCL电纺膜的纤维表面沉积的磷灰石很少,nHA-PCL复合电纺膜具有较好的诱导成骨性能。     

Partially crystalline epoxy networks with superior mechanical and adhesion properties

The mechanical and adhesion behavior of cationically polymerized, partially crystalline epoxy networks is presented. For this, a reactive and a nonreactive poly(?-caprolactone) (PCL) were used as the crystalline component for the formation of copolymers and polymer alloys, respectively. The trade-off between toughness on the one hand and glass transition temperature and mechanical strength on the other can be reduced by the presence of nanostructures in combination with small crystalline domains (相似文献   

Mn含量对Fe-Mn合金组织及力学性能的影响

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单孔射流冲击流动与换热过程的数值模拟

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CFD modelling of natural displacement ventilation in an enclosure connected to an atrium

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溢洪道挑流消能数值模拟计算模型的选择

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生物医用形状记忆高分子材料

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