Robust preparation and reinforcement mechanism study of PVDF hollow fiber membrane with homogeneous fibers

Fig.5 The FTIR spectra (a), XRD diffraction curves (b), azimuth angle scanogram (c) and stress-strain curves (d) of fibers before and after dry-wet spinning
Fig.6 The mechanical property of prepared membranes: (a) stress-strain curves, (b) bursting strength curves; and (d) pullout force curves of the pullout of fiber reinforcement from the membrane separation layer.
Fig.8 Pore size distribution (a), porosity and pure water flux (b), BSA rejection test (c), the change of separation flux and rejection before and after ultrasound (d)

图5 为干湿法纺丝前后纤维的（a）傅里叶变换红外光谱（FTIR）、（b）X射线衍射（XRD）曲线、（c）方位角扫描图谱以及（d）应力-应变曲线。
图6 为所制备膜的力学性能：（a）应力-应变曲线、（b）破裂强度曲线；以及（d）纤维增强体从膜分离层中拔出的拔出力曲线。
图8 为（a）孔径分布、（b）孔隙率与纯水通量、（c）牛血清白蛋白（BSA）截留试验、（d）超声处理前后分离通量与截留率的变化情况。