| abstract |
The present invention provides a method for preparing a modified polylactic acid nonwoven fabric for oil-water separation, comprising the following steps: (1) dissolving PDLA in an organic solvent, and preparing a 0.1%wt-5%wt PDLA solution, Add a poor solvent of 1-4 times the volume of polylactic acid, and stir to obtain a mixed solution; (2) pour the mixed solution of step (1) into a container equipped with PLLA non-woven fabric; (3) stand at room temperature for a certain period of time Then dry. The modified polylactic acid non-woven fabric prepared in the present application produces micron-sized particles, which increases the surface roughness of the polylactic acid non-woven fabric. The contact angle is 0°, the adsorption capacity is increased by more than 40% compared with the unmodified polylactic acid non-woven fabric, and it still has good stability after 10 times of reuse. The preparation method of the invention is simple, completely biodegradable, does not cause secondary pollution, and can be used for the treatment of oily wastewater in a wide range. |