▎ 摘　　要

NOVELTY - Method for preparing graphene oxide modified polyamide-6, involves (i) taking caprolactam and antioxidant additive SD-390 in intermediate tank, heating, and uniformly mixing to form stable mixed slurry, (ii) heating mixed slurry, injecting slurry to pre-polymerizer, and polymerizing, (iii) injecting material that have reached residence time to post-polymerizer, and polymerizing to obtain polymer melt, (iv) filtering polymer melt that have reached the residence time, sending to casting head, extruding into strips, cooling, and cutting to obtain flat particles, (v) passing particles to pre-extraction water tank through vibrating screen, extracting, transporting to extraction tower by mud pump, extracting, transporting to dehydrator, dehydrating, and sending to drying tower, and (vi) controlling nitrogen temperature in drying tower at 140-180 degrees C and residence time for 5-7 hours, passing particles through buffer tank, and sending to cooling silo. USE - The method is useful for preparing graphene oxide modified polyamide-6. ADVANTAGE - The method improves flow properties of the product. DETAILED DESCRIPTION - Method for preparing graphene oxide modified polyamide-6, involves (i) taking 100 pts. wt. caprolactam and 0.1-0.5 pt. wt. antioxidant additive SD-390 in an intermediate tank, heating at 100 degrees C, and uniformly mixing to form a stable mixed slurry, (ii) heating the mixed slurry at 180 degrees C by a preheater, injecting the slurry to a pre-polymerizer, and polymerizing the material at 220-260 degrees C under 0.05-0.3 MPa for 5-10 hours, (iii) injecting the material that have reached the residence time to a post-polymerizer by the former polymerizer, and polymerizing the material at 240-275 degrees C under 0.03-0.05 Mpa for 3-6 hours to obtain a polymer melt, (iv) filtering the polymer melt that have reached the residence time through a melt filter, sending to a casting head, extruding into strips, cooling using cold water, and cutting the polymer particles by a pelletizer to obtain flat particles, (v) passing the particles to a pre-extraction water tank through vibrating screen, extracting the particles at 70-85 degrees C for 6-10 hours, transporting to extraction tower by mud pump, extracting particles at 80-95 degrees C for 8-12 hours, transporting to a dehydrator, dehydrating, and sending to a drying tower, and (vi) controlling the nitrogen temperature in the drying tower at 140-180 degrees C and residence time for 5-7 hours, passing the particles through buffer tank, and sending to cooling silo.