Novel polylactic acid and ionic liquid blending flameresistant material and preparation method thereof

Abstract

The invention provides a novel polylactic acid and ionic liquid blending flameresistant material and a preparation method thereof. The method comprises the following steps: performing vacuum drying on the polylactic acid and 1-butyl-3-methylimidazole dibutyl phosphate respectively at the temperature of 60 DEG C for 12 hours, performing melt blending on the dried polylactic acid and 1-butyl-3-methylimidazole dibutyl phosphate according to the preset mass percent in an internal mixer, and enabling 1-butyl-3-methylimidazole dibutyl phosphate to uniformly disperse in a melt of the polylactic acid through the strong shearing action provided by a rotor of the internal mixer so as to obtain the blending of the polylactic acid and 1-butyl-3-methylimidazole dibutyl phosphate; wherein the preset mass percent of the polylactic acid and 1-butyl-3-methylimidazole dibutyl phosphate is (99.5:0.5)-(97:3), the blending temperature is 180 DEG C, the blending rotating speed is 60 r / min, and the blending time is 4 min.

Description

technical field [0001] The invention relates to the field of flame retardant materials, in particular to a novel polylactic acid and ionic liquid blended flame retardant material and a preparation method of the novel polylactic acid and ionic liquid blended flame retardant material. Background technique [0002] PLA (Polylactic Acid, polylactic acid) is a relatively promising polyester with biodegradability, good biocompatibility, high strength, good transparency, and rich sources of raw materials. However, PLA also has significant disadvantages, such as slow crystallization rate, resulting in poor processability, high brittleness, low heat distortion temperature, and poor flame retardancy, etc. In recent years, as people pay more and more attention to fire hazards, the research on flame retardant materials has developed rapidly. PLA as a biodegradable material, due to its poor thermal stability, the oxygen index (LOI) is about 22, and the carbonization ability is weak duri...

AI Technical Summary

Problems solved by technology

The ionic liquid flame retardant contains 1-oxo-4-hydroxymethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane (PEPA) skeleton, and polyphosphoric acid After compounding with ammonium and other external gas sources, it can produce good flame retardant effect on polymer materials, and at the same time, it has good compatibility with polymers, but the amount of flame retardant added is too high

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