Abstract
A polypropylene/polyester (PP/PET) composite fabric with surface roughness due to a linear valley-like structure at the micro/nano scale and broad fiber diameter distribution of 0.3–16 μm was fabricated by melt blowing with incompatible components, followed by etching of the fiber surface with sodium hydroxide. The unique valley-like structure increased the fiber surface roughness up to 0.99, resulting in a high water contact angle of 140.7°. Due to the rough morphology of the valley-like structure, the saturation adsorption capacity for soybean oil reached 20.86 g/g. Because of these outstanding properties, the PP/PET composite micro/nano-fabric with valley-like surface structure provides an alternative to high-efficiency oil sorbents.
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