Study of Flame-retardant Cotton Stalk Bast Fibers Reinforced Polylactic Acid Composites

摘要

As PLA composites are easy to kindle, making flame-retardant composites is particularly important. PLA can be widely used after improvement. In the process of making cotton stalk bast fibers reinforced PLA composites, adding APP/PER a type of flame-retardants in the experiment produces a kind of composites with good flame-retardant property. Orthogonal experiment table including length and mass fraction of fibers, molding temperature and addition of flame-retardants was devised. Then the study focused on the flame-retardant property of the composites and the analysis of range and variance were done. The optimal processing condition was obtained: length of fibers was 8mm, mass fraction of fibers was 30%, molding temperature was 175°C and addition of flame-retardants was 10%. Fibers reinforced PLA composites with APP/PER got better flame-retardant property than the composites without APP/PER, with the LOI rising 6.61. This kind of composite can be extensively applied in many fields.