Preparation and properties of PLA/PCL micro-nano fiber membrane by melt differential electrospinning
In order to enhance the toughness of polylactic acid(PLA)melt electrospun fiber,a blend of polycaprolactone(PCL)and PLA was used as the electrospun material.PLA/PCL ultrafine fiber membranes were prepared using melt differential electrospinning.The effects of PCL and PLA ratios,electrospinning temperatures,voltages and rotational speeds of the roller on the fineness,mechanical properties,and hydrophilicity and porosity of the PLA/PCL melt electrospun fiber were investigated.It was found that under the condition of a 7:3 ratio between PLA and PCL,a temperature of 230℃,voltage of 40kV and rotational speed of 2200r/min,PLA/PCL electrospun fiber achieved a minimum average diameter of(2.049±0.438)μm.The tensile strength increased by 115％to reach 13.68MPa while elongation increased by 21.5％to reach 175％compared to pure PLA melt electrospun membranes.Additionally,it was observed that porosity initially increased but subsequently decreased with an increase in collector roll speed for the PLA/PCL ultrafine fiber membranes.At a roller speed of 1400r/min,these membranes exhibited strong hydrophobic properties with a water contact angle measuring at approximately 144.3° along with remarkable porosity reaching up to 74.42％.This study was significant in efficiently fabricating ultrafine fiber membranes tailored to diverse requirements using environmentally-friendly techniques.
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