The morphology and evolution of aerosol oil droplets on PAN fibrous webs and modified PAN fibrous webs was analyzed based on the filtration treatment of aerosol suspending oil droplets in the atmosphere. The experimental results show that aerosol oil droplets exhibit different structures and evolution behaviors on fibrous webs with different surface energy. Aerosol oil droplets form axisymmetric structures on PAN fibers and non-axisymmetric structures on modified PAN fibers. Non-axisymmetric structure of aerosol oil droplets on modified PAN fibers switches to axisymmetric structure during the growth of aerosol oil droplets on the fibers. The final structure of aerosol oil droplets on the modified PAN fibers and PAN fibers do not form the liquid film on the fibers, and form large axisymmetric aerosol oil droplets. The pressure drop and the liquid entry pressure of the fibrous membrane were measured. Results show that modified PAN fibrous membrane can prevent aerosol oil droplets from infiltrating compared to original PAN fibrous membranes and have the function of blocking aerosol oil droplets from invading the fibrous membranes.
Ying-ying WEI,Dong-yue JIANG,Qing-teng FU,Fei GUO. Behaviors of aerosol oil droplets on modified PAN fibrous webs. Journal of ZheJiang University (Engineering Science), 2020, 54(1): 196-201.
Tab.1Electrospinning processing parameters and fibrous membrane parameters
Fig.1Schematic diagram of initiated chemical vapor deposition apparatus
Fig.2Schematic diagram of pressure drop of fibrous membranes testing apparatus
Fig.3Optical microscope images
Fig.4Microscopy images of aerosol oil droplets captured by different fibers
Fig.5Oil droplets images and schematic diagram after long time of aerosol oil droplets capture
Fig.6Experimental data of pressure drop and liquid entry pressure of fibrous membranes
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