Study on the Effect of Halloysite on the Flame Retardancy of Polylactic Acid
Polylactic acid(PLA)is derived from crops and has attracted much attention due to its excellent biocompatibility,mechanical properties and biodegradability.It is expected to replace petroleum-based polymers in many areas.However,the high flammability of PLA limits its application in automobiles,packaging materials,electronics and other fields.Halloysite nanotubes(HNTs)are a kind of natural tubular nanoparticles with abundant sources,good mechanical properties and biocompatibility,and have broad application prospects in polymer modification.In this paper,halloysite and phosphating chitosan(PCS)were compounded into PLA,and the effect of the amount of HNTs on the mechanical properties,combustion properties and thermal properties of the PLA/PCS composite was studied.The results show that the addition of HNTs improved the flame retardant performance and smoke suppression effect of the system,and increased the tensile strength and thermal stability.
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