国产成人亚洲精品无码青app,白丝紧致爆乳自慰喷水,国产疯狂女同互磨高潮在线观看,jizzjizz少妇亚洲水多

The pure polyvinyl acetate (PVAc) nanofiber and PVAc/titanium dioxide (TiO2) composite nanofiber were prepared
by sol–gel process with electrospinning. The effect of increasing TiO2?contents on diameter distribution, surface
morphology, and elastic modulus of nanofibers was characterized using a scanning electron microscope (SEM) and
an atomic force microscope (AFM) equipped with picoforce. SEM images showed that the average diameter of
composite nanofiber decreased with the increase in TiO2?The three-point bending test indicated that the elastic
modulus of PVAc/TiO2?nanofiber significantly increased as TiO2?increased.