Preparation method of polylactic acid based hydrophobic thin film

The invention discloses a preparation method of a polylactic acid based hydrophobic thin film. The preparation method comprises the following steps: preparing a poly-L-lactic acid polymer solution into a poly-L-lactic acid polymer thin film; spin-coating a triblock copolymer PDLA (Poly(D-lactic acid))-PDMS (Polydimethylsiloxane)-PDLA solution on a poly-L-lactic acid polymer thin film matrix; carrying out annealing treatment to obtain the polylactic acid based hydrophobic thin film. The preparation method of the polylactic acid based hydrophobic thin film is simple, efficient and technologicalconditions are easy to control and the uniform hydrophobic thin film can be prepared, so that the preparation method has relatively great actual application value. 本发明公开了种聚乳酸基疏水薄膜的制备方法，包括以下步骤：将左旋聚乳酸聚合物溶液制成左旋聚乳酸聚合物薄膜，将三嵌段共聚物PDLA-PDMS-PDLA溶液旋涂于上述左旋聚乳酸聚合物薄膜基体之上，经过退火处理，获得所述聚乳酸基疏水薄膜。本发明的聚乳酸基疏水薄膜的制备方法简单高效，工艺条件容易控制，可以制备出均匀的疏水薄膜，具有较大的实际应用价值。