Abstract: In this work, a type of biodegradable polybutylene succinate (PBS) film with strong hydrophobicity was designed and prepared through a microphaseseparation method by using chloroform as a solvent and anhydrous ethanol as a nonsolvent. The effects of PBS concentration and nonsolvent content on wettability, crystallinity, adhesion and surface morphology of the prepared PBS film were investigated. The results indicated that different surface microstructures were obtained by changing the PBS concentration and nonsolvent content. The water contact angle increased with an increase of nonsolvent content and achieved a maximum value of 142.5 °, which was higher than that of untreated PBS by approximately 60 °. The crystallinity of PBS film exhibited a positive relationship with hydrophobicity, and the higher the degree of crystallinity, the greater the water contact angle of PBS film. The hydrophobic film demonstrated a roselike hydrophobic surface with high adhesion.

Key words: poly(butylene succinate), hydrophobic material, nonsolvent, phase separation, high adhesive