The invention relates to the technical field of 3D printing materials, in particular to a composite polylactic acid material for 3D printing and a preparation method thereof. The specific steps are as follows: Step 1: subject carboxymethyl cellulose to an acyl chlorination reaction with thionyl chloride to obtain acyl chlorinated cellulose; react the acyl chlorinated cellulose with ammonia to obtain amidated cellulose; subject the amidated cellulose to a Michael addition reaction with triallyl citrate to obtain modified cellulose; Step 2: graft maleic anhydride-grafted polystyrene polymer with glycidyl ether to obtain a compatibilizer; Step 3: add polylactic acid, polycarbonate, modified cellulose and compatibilizer into a twin-screw extruder for extrusion and granulation to obtain composite polylactic acid pellets; add the composite polylactic acid pellets into a drawing machine, draw filaments, then cool and dry to obtain the composite polylactic acid material for 3D printing.
Country Code: CN
Application Number: CN202411289904.0
