论文部分内容阅读
采用静电纺丝技术制备了聚甲基乙撑碳酸酯(PPC)纤维膜及不同纳米羟基磷灰石含量的PPC/HA复合纤维膜。利用旋转流变仪、扫描电子显微镜(SEM)、X射线衍射仪(XRD)和差示扫描量热仪(DSC)对PPC静电纺丝液的可纺性及PPC/HA复合纤维膜的形貌、结晶性能及热性能进行了表征。流变结果表明,PPC溶液的零切黏度(η_0)随PPC浓度的增加而增加,且在PPC浓度为18%时,具有较好的可纺性;SEM结果表明,随着HA用量的增加,PPC/HA复合纤维的直径逐渐减小;XRD结果表明,PPC/HA之间没有发生化学反应,保持了PPC和HA原有的性质;力学测试结果表明,随着HA用量的增加,PPC/HA复合材料的拉伸强度先增加后减小,在HA用量为3.0%时,达到最佳值;DSC结果表明,随着HA用量的增加,PPC/HA复合纤维膜的玻璃化转变温度(T_g)先增加后减小,HA有效地增加了PPC/HA复合纤维膜的T_g,拓宽了其应用范围。
The PPC / HA composite fiber membrane with polymethylmethylene carbonate (PPC) fiber membrane and nano-hydroxyapatite content was prepared by electrospinning technique. The spinnability of PPC electrospinning liquid and the morphology of PPC / HA composite fiber membrane were investigated by using rotational rheometer, scanning electron microscope (SEM), X-ray diffraction (XRD) and differential scanning calorimeter (DSC) , Crystallinity and thermal properties were characterized. The rheological results showed that the zero-shear viscosity (η_0) of PPC solution increased with the increase of PPC concentration, and had good spinnability when the PPC concentration was 18%. SEM results showed that with the increase of HA, The diameter of PPC / HA composite fibers decreased gradually. The XRD results showed that there was no chemical reaction between PPC / HA and maintained the original properties of PPC and HA. The mechanical test results showed that with the increase of HA, PPC / HA The tensile strength of the composite increased first and then decreased, reaching the best value when the amount of HA was 3.0%. The DSC results showed that the glass transition temperature (T_g) of PPC / The first increase and then decrease, HA effectively increased the T_g of PPC / HA composite fiber membrane, broaden the scope of its application.