Polycarbonate composite material for 3D printing and preparation method thereof
A polycarbonate and composite material technology, applied in the field of 3D printing materials, can solve the problems of easy agglomeration, shrinkage, poor fluidity, etc., and achieve the effects of uniform solidification, easy control of the preparation process, and reduction of thermal shrinkage.
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[0029] Example 1
[0030] 1) Surface modification of magnesium borate whiskers and graphene oxide: add 10 parts by weight of magnesium borate whiskers, 3 parts of graphene oxide and water into a container, and ultrasonically disperse for 3 minutes to prepare a suspension; The coupling agent is dissolved in ethanol to prepare a solution with a mass content of the coupling agent of 20%; the suspension is mixed with the coupling agent solution, heated to 40~60℃, stirred for 20 minutes, filtered, and dried in vacuum to obtain the modified material ;
[0031] 2) Add the modified material obtained in step 1), 50 parts by weight of polycarbonate, and 0.1 part by weight of heat stabilizer to a high-speed mixer, stir and mix at high speed for 10 minutes, and then send to the intermeshing co-rotating twin-screw extruder for melting Plasticization, shear modification, extrusion and pelletization to prepare polycarbonate composite particles;
[0032] 4) The composite material particles prepare...
Example Embodiment
[0033] Example 2
[0034] 1) Surface modification of magnesium borate whiskers and graphene oxide: add 20 parts by weight of magnesium borate whiskers, 5 parts of graphene oxide and water into a container, ultrasonically disperse for 5 minutes, and prepare a suspension; The coupling agent is dissolved in ethanol to prepare a solution with a mass content of the coupling agent of 20%; the suspension is mixed with the coupling agent solution, heated to 40~60°C, stirred for 40 minutes, filtered, and dried in vacuum to obtain the modified material ;
[0035] 2) Add the modified material obtained in step 1), 60 parts by weight of polycarbonate, and 0.5 parts by weight of heat stabilizer into a high-speed mixer, stir and mix at high speed for 15 minutes, and then send to the intermeshing co-rotating twin-screw extruder for melting Plasticization, shear modification, extrusion and pelletization to prepare polycarbonate composite particles;
[0036] 4) The composite material particles prep...
Example Embodiment
[0037] Example 3
[0038] 1) Surface modification of magnesium borate whiskers and graphene oxide: add 20 parts by weight of magnesium borate whiskers, 4 parts of graphene oxide and water into a container, and ultrasonically disperse for 3 minutes to prepare a suspension; The coupling agent is dissolved in ethanol to prepare a solution with a mass content of the coupling agent of 20%; the suspension is mixed with the coupling agent solution, heated to 40~60℃, stirred for 20 minutes, filtered, and dried in vacuum to obtain the modified material ;
[0039] 2) Add the modified material obtained in step 1), 70 parts by weight of polycarbonate, and 0.1 parts by weight of heat stabilizer to a high-speed mixer, stir and mix at high speed for 20 minutes, and then send to the intermeshing co-rotating twin-screw extruder for melting Plasticization, shear modification, extrusion and pelletization to prepare polycarbonate composite particles;
[0040] 4) The composite material particles prepa...
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