Preparation and Properties of PLA/rGO/HTPDMS Nanofiber Membranes
In order to reduce the environmental hazard of waste oil water,the composite nanofibrous membranes were fabricated by electrospinning technique.The membranes were prepared by blending poly(lactic acid)/reduced graphene oxide(PLA/rGO)and hydroxyl-capped polydimethylsiloxane(HTPDMS)in varying ratios.The nanofibrous membranes were subjected to characterization by a scanning electron microscopy,an infrared spectroscopy,and a contact angle instrument to assess their micro-morphology,surface composition,and hydrophobicity.The results show that the addition of HTPDMS into PLA/rGO results in the formation of membranes consisting of nano-scaled fibres with HTPDMS.The hydrophobicity of PLA/rGO membrane is greatly improved by the addition of HTPDMS.The separation of oil-water mixtures has high oil fluxes,the fluxes are higher than 18 400 L/(m2·h),and the separation efficiency is greater than 98.2%.After 10 cycles of separation,the separation efficiency of fiber membrane can still reach more than 97%,with good cycle stability.PLA/rGO/HTPDMS fiber membrane has a broad application prospect in oily wastewater treatment.
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