In response to the problems of poor mechanical ductility and high hydrophilicity of natural polysaccharide films, we propose to introduce rubber material (carboxystyrene styrene-butadiene latex, XSBR) into natural polysaccharides (sodium alginate, SA) to enhance the mechanical properties of SA and reduce its hydrophilicity. In addition, dispersing ZnO in SA through the mediating effect of XSBR can further reduce its hydrophilicity and endow the composite film with antibacterial activity. The tensile strength and strain of the composite film reached 16.1 MPa and 267.3 %, respectively (strain increased by 74 times compared to SA films). The biomimetic design of the ZnO uniformly distributed on the film's surface mimics the tiny synapses on the surface of a lotus leaf, further improving the film's hydrophobic and waterproof properties, with its water contact angle increasing from 68.7 degrees to 97.6 degrees. Besides, the composite film exhibits good light transmission, barrier, antimicrobial, and antioxidant activity. The composite film was effective in extending strawberry freshness up to 9 days. More importantly, indoor-outdoor soil degradation studies proved that the composite film is degradable. This work provides a possible solution for developing durable, hydrophobic, and biodegradable biomass films to replace petroleum-based plastic films.

来源平台：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES