Research Article

Different Structures of PVA Nanofibrous Membrane for Sound Absorption Application

Figure 3

Image of surface of PVA nanofiber structures by scanning electron microscope SEM for layers after water vapour action during time of 60 seconds (b) and 120 seconds (c), without liquid water or water vapour action (a) and structure after action of water in the liquid condition to nanofiber layer during the time of 60 seconds (d). Magnification = 5000X and scale bar = 20 μm.
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