Preparation method of graphene modified polyester chip, modified polyester fiber and application
A technology of graphene modification and polyester chips, which is applied in the field of modified polyester fibers, can solve the problems of expensive freeze-drying equipment, long freeze-drying time, and high cost, and achieve good mechanical properties, long processing time, and high cost. Effect
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[0030] Preparation of ethylene glycol graphene mixture
[0031] Add 1 part of Hummers method graphene oxide and 2 parts of sodium citrate into 200 parts of deionized water, ultrasonically disperse for 30 minutes, seal and place in a hydrothermal kettle for 16 hours at 110°C to obtain graphene hydrogel 1; graphene Hydrogel 1 was replaced twice with deionized water, and then replaced five times with acetone with 5 times the volume of graphene hydrogel. The replacement condition was ultrasonic cleaning for 12 seconds at room temperature to remove excess acetone and obtain graphene acetone gel. Glue 1. The graphene acetone gel 1 was baked in an oven at 70° C. for 2 hours, and the solid content of the graphene acetone gel 1 was measured to be 4.4 wt%.
[0032] Add 10 parts of ethylene glycol to 20 parts of acetone solvent to dissolve, add 2 parts of graphene acetone gel 1, stir and mix evenly, remove acetone by distillation under reduced pressure, and obtain ethylene glycol graphe...
Embodiment 1
[0039] 100 parts of ethylene glycol, 20 parts of ethylene glycol graphene mixture 1 and 270 parts of terephthalic acid are subjected to an esterification reaction at 255-260 °C, and the generated water is continuously removed until the esterification rate reaches more than 90%. Add 0.08 parts of antimony trioxide were reacted at 275-280° C. for 2 hours under a negative pressure of <500 Pa, and the graphene-modified polyester chip 1 was obtained through casting and pelletizing after cooling down. The intrinsic viscosity of the graphene-modified polyester chip 1 is 0.71dl / g.
[0040] Graphene-modified polyester chips 1 are dried to remove water until the water content is lower than 0.005wt%, metered, melt-spun at 280-285°C (spinning speed 2800m / min), cooled, oiled, and drawn at a ratio of 5 Modified polyester fiber 1 was prepared by down drawing, heat setting, and coil forming.
Embodiment 2
[0042] 100 parts of ethylene glycol, 50 parts of ethylene glycol graphene mixture 2 and 365 parts of terephthalic acid are subjected to esterification reaction at 260-265 °C, and the generated water is continuously removed until the esterification rate reaches more than 92%. Add 0.1 part of antimony trioxide and 0.08 part of triphenyl phosphate were reacted at 275-280° C. for 1.5 hours under a negative pressure of <300 Pa, and the graphene-modified polyester chip 2 was obtained through casting and pelletizing after cooling down. The intrinsic viscosity of the graphene-modified polyester chip 2 is 0.82dl / g.
[0043] Graphene-modified polyester chips 2 are dried to remove water until the water content is lower than 0.005wt%, metered, melt-spun at 280-285°C (spinning speed 2800m / min), cooled, oiled, and drawn at a ratio of 5 Modified polyester fiber 2 is prepared by down drawing, heat setting, and coil forming.
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