CDs/PBAT Nanofiber Films With High Tensile Strength and Flame‐Retardant Property via Microfluidic Technology

ABSTRACT The poly(butylene adipate‐co‐terephthalate) (PBAT) nanofiber film prepared by electrospinning method exhibits limited application in many fields due to its poor flame retardancy and machinal property, despite being a biodegradable material with exceptional toughness and ductility properties. In this work, we employed microfluidic technology to continuously produce blue fluorescent carbon dots (CDs) on an aluminum‐based microfluidic chip using citrate and ethanolamine as precursors. Subsequently, utilizing microfluidic electrospinning technology, the CDs/PBAT composite nanofiber films with blue fluorescence were prepared in situ reaction. Interestingly, compared to pure PBAT nanofiber membranes, the CDs/PBAT composite nanofiber membranes exhibit a tensile strength of 4.31 MPa, representing a remarkable increase of 3.24 times, and an elongation at break of 491%, indicating an improvement of 1.62 times. More importantly, it had demonstrated that the incorporation of CDs into PBAT can achieve flame‐retardant effects. We firmly believe that the microfluidic strategy could open up a new idea for the synthesis of CDs and point out the direction for the meaningful fabrication of PBAT nanofiber film with high tensile strength and flame‐retardant property.