A facile method was used for fabricating in-situ-polymerized shape memory polyurethane (PU) hydroxyapatite (HA) nanocomposite scaffolds through electrospinning. The chemical structure and hydrogen bonding index (HBI) content were investigated using Fourier transform infrared spectroscopy. The crystalline morphology was analyzed by X-ray diffraction patterns. Differential scanning calorimetry was conducted to determine the glass transition temperature (T_g ) and degree of crystallinity. The results revealed that HA nanoparticles provide significant reinforcement of PU. Furthermore, incorporation of HA nanoparticles improved the shape memory properties of nanocomposites. The effect of HA nanoparticles on PU/HA electrospun fiber diameter, porosity, mechanical, and shape memory properties were examined.

一种简便的方法被用于通过静电纺丝原位聚合的形状记忆聚氨酯（PU）羟基磷灰石（HA）纳米复合支架。使用傅里叶变换红外光谱研究了化学结构和氢键指数（HBI）含量。通过X射线衍射图分析晶体形态。进行差示扫描量热法以确定玻璃化转变温度（T _g ）和结晶度。结果表明，HA纳米颗粒可显着增强PU。此外，掺入HA纳米颗粒改善了纳米复合材料的形状记忆性能。检查了HA纳米颗粒对PU / HA电纺纤维直径，孔隙率，机械性能和形状记忆性能的影响。