Herein, both rigid cellulose nanocrystal with photoactive groups (CNC-Cc) and amorphous polycarbonate (extracted from discarded CD) were functionalized as reinforcing agents to obtain poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/polycarbonate/CNC-Cc (PHBV/PC/CNC-Cc) composite films via a Pickering emulsion approach. With the addition of PC and CNC-Cc, an obvious “soft-rigid” synergistic effect on the performances of PHBV matrix was found. Compared to neat PHBV, the best mechanical strength/toughness of PHBV/PC/CNC-Cc-7 increased by 273.8%/821.9%. Meanwhile the PHBV/PC/CNC-Cc-7 nanocomposite showed excellent UV shielding, antioxidant, and antibacterial abilities, due to dynamic competition effect of amorphous PC and rigid CNC-Cc on the PHBV microstructure and interaction. Therefore, this work could solve the current problems of poor mechanical flexibility of biopolymers for potential applications in easy-oxidized food packaging.

在此，具有光活性基团的刚性纤维素纳米晶体（CNC-Cc）和无定形聚碳酸酯（从废弃的CD中提取）均被功能化为增强剂，以获得聚（3-羟基丁酸酯-co-3-羟基戊酸酯）/聚碳酸酯/ CNC-Cc（PHBV / PC / CNC-Cc）复合膜，采用Pickering乳液方法。通过添加PC和CNC-Cc，发现对PHBV矩阵的性能具有明显的“软刚性”协同作用。与纯PHBV相比，PHBV / PC / CNC-Cc-7的最佳机械强度/韧性提高了273.8％/ 821.9％。同时，由于非晶态PC和刚性CNC-Cc对PHBV微观结构和相互作用的动态竞争作用，PHBV / PC / CNC-Cc-7纳米复合材料显示出优异的紫外线屏蔽，抗氧化和抗菌能力。因此，