Preparation and properties of poly(lactic acid)/g-titanium dioxide electrospinning membranes based on thiol-ene click chemistry

The g-titania functional additives were prepared via thiol-ene click chemical reaction, and then the polylactic acid/g-titania nanofiber membrane was prepared via electrospinning technology. Characterization via scanning electron microscopy and nitrogen adsorption/desorption showed that the average fiber diameter of the TP4 fiber membrane was 489 nm, the specific surface area was 34.69 m 2 ·g −1 , and the average pore size was 22.31 nm. The adsorption mechanism, photocatalytic degradation performance, and reusability of polylactic acid/g-titania nanofibrous membranes were characterized. The results showed that the adsorption of methylene blue by TP4 nanofiber membrane followed a pseudo-second-order kinetic model, which could be represented by the Langmuir isotherm model, and the maximum adsorption capacity was 35.44 mg·g −1 . In addition, the photocatalytic degradation of methylene blue by TP4 nanofiber membrane followed a first-order kinetic model and exhibited high reusability. Therefore, polylactic acid/g-titania nanofiber membrane, as an efficient dye removal material, shows a good application prospect in wastewater treatment.