*2.1. Materials*

Poly(butylene adipate-co-terephthalate) (PBAT) pellets were supplied by BASF. The melt flow index (190 ◦C, 2.16 kg) was 5.0 g/10 min. The MXene (Ti3C2TX, 400 mesh, purity > 99%) nanosheets etched by HF were supplied by 11 Technology Co., Ltd. (Changchun, China). The specific surface area of the obtained Ti3C2TX was approximately 31.5 m2/g.
