Graphene oxide enhanced polyester fiber and preparation method thereof

Abstract

The invention relates to a graphene oxide reinforced polyester fiber and a preparation method thereof, and belongs to the technical field of polyester fibers. The graphene oxide enhanced polyester fiber is prepared from polyester chips and coated graphene oxide through mixing, extrusion granulation and melt spinning. The coated graphene oxide is obtained by sequentially carrying out coating of polydopamine, ring-opening addition of double-end epoxy organic silicon and grafting of aniline / para aminobenzoic acid on graphene oxide, and the double-end epoxy organic silicon is prepared by carrying out hydrosilylation on allyl glycidyl ether and tetramethyl dihydrodisiloxane; the coated graphene oxide can be uniformly dispersed in the polyester fiber and is not easy to separate out, correspondingly, the prepared graphene oxide enhanced polyester fiber has higher breaking strength, and the breaking strength of the polyester fiber can still be kept at a higher value even after multiple times of washing.

Claims

1. A method for preparing graphene oxide-enhanced polyester fiber, characterized in that: The preparation method comprises the following steps: The polyester chips and the coated graphene oxide are mixed, and the mixture is extruded and granulated through a twin-screw extruder to obtain a masterbatch; and the masterbatch is melt-spun.

2. The method for preparing a graphene oxide-enhanced polyester fiber according to claim 1, wherein: The mass ratio of the polyester chips to the coated graphene oxide is 100:0.5-1.

3. The method for preparing a graphene oxide-enhanced polyester fiber according to claim 1, wherein: The coated graphene oxide is prepared by the following steps: Step A: 150-160 parts by weight of Tris hydrochloric acid buffer and 0.5-1 parts by weight of graphene oxide are stirred in ultrasound at 20-30° C. for 15-30 minutes, and then 10 parts by weight of dopamine hydrochloride aqueous solution are added dropwise under air atmosphere while stirring. After all the addition is complete, stirring is continued for 18-24 hours to react, centrifuged, washed with deionized water, and dried to obtain component A; Step B: 100-110 parts by weight of toluene and 50 parts by weight of chloroform are mixed at room temperature, and then 1-1.5 parts by weight of component A and 4 parts by weight of double-ended epoxy silicone are added, followed by stirring under reflux at 55-60° C. in the dark under a nitrogen atmosphere for 24-26 hours, naturally cooling to room temperature, centrifuging, washing with toluene, and drying to obtain component B; Step C: 100-120 parts by weight of ethanol and 4-6 parts by weight of a grafting agent are mixed at room temperature, and then 1 part by weight of component B is added. The mixture is then refluxed and stirred at 55-60° C. under a nitrogen atmosphere for 14-16 hours, cooled naturally to room temperature, centrifuged, washed with deionized water, and dried.

4. The method for preparing a graphene oxide-enhanced polyester fiber according to claim 3, wherein: The dripping rate in step A is 1-2 drops / s.

5. The method for preparing a graphene oxide-enhanced polyester fiber according to claim 3, wherein: The mass fraction of the dopamine hydrochloride aqueous solution in step A is 10-13%.

6. The method for preparing a graphene oxide-reinforced polyester fiber according to claim 3, wherein: The double-ended epoxy silicone described in step B is prepared by the following steps: 0.2-0.4 parts by weight of a platinum catalyst and tetramethyldihydrogen disiloxane are added to 10-15 parts by weight of allyl glycidyl ether, followed by stirring under reflux at 60-70° C. for 8-10 hours under a nitrogen atmosphere, followed by natural cooling to room temperature, filtering, and discarding the residue; the molar ratio of the allyl glycidyl ether to the tetramethyldihydrogen disiloxane is 2:

1.

7. The method for preparing graphene oxide-enhanced polyester fiber according to claim 3, wherein: The grafting agent in step C comprises aniline and p-aminobenzoic acid in a mass ratio of 2-3:

1.

8. The method for preparing graphene oxide-enhanced polyester fiber according to claim 1, wherein: The operating parameters of the twin-screw extruder are: zone 1 temperature 250°C, zone 2 temperature 260-265°C, zone 3 temperature 265-270°C, zone 4 temperature 275°C, zone 5 temperature 265-270°C, die head temperature 255°C, and rotation speed 80-100r / min.

9. The method for preparing a graphene oxide-enhanced polyester fiber according to claim 1, wherein: The process parameters of the melt spinning are: spinneret diameter 0.2-0.4 mm, speed 1000 m / min, temperature 275-280° C., and draft ratio 3-4.

10. A graphene oxide reinforced polyester fiber prepared according to the preparation method according to any one of claims 1 to 9.

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