▎ 摘　　要

NOVELTY - Flame-retardant polylactic acid fabric comprises fabric surface orderly loaded with a flame-retardant-containing carbon nanotube layer and a flame-retardant-containing graphene oxide layer. USE - The flame-retardant polylactic acid fabric is useful in an early warning device (all claimed). ADVANTAGE - The fabric avoids the problems of poor compatibility, high addition and easy agglomeration in melt blending flame-retardant modification, and low spinnability, has excellent flame retardant performance, service performance and early warning function, and meets actual use requirements. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the fabric, involving (a) adding carbon nanotubes to a positively charged flame retardant solution and ultrasonically treating to obtain an electrically positive carbon nanotube impregnating solution, adding graphene oxide to a negatively charged flame retardant solution and ultrasonically processing to obtain electronegative graphene oxide impregnating solution, and (b) immersing the polylactic acid fabric in the electrically positive carbon nanotube impregnating solution, washing, drying and dipping in the electronegative graphene oxide dipping solution, washing, drying and repeatedly operating to obtain the finished product.