CN105463612A - Graphene quantum dot reinforced polyarmide fiber and preparation method thereof - Google Patents

Graphene quantum dot reinforced polyarmide fiber and preparation method thereof Download PDF

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CN105463612A
CN105463612A CN201510953167.4A CN201510953167A CN105463612A CN 105463612 A CN105463612 A CN 105463612A CN 201510953167 A CN201510953167 A CN 201510953167A CN 105463612 A CN105463612 A CN 105463612A
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graphene quantum
quantum dot
gqd
fiber
melt spinning
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褚金
李朝龙
张恒
池铫
史浩飞
杜春雷
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Chongqing Institute of Green and Intelligent Technology of CAS
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Chongqing Institute of Green and Intelligent Technology of CAS
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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/88Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/90Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/08Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
    • C08G69/14Lactams
    • C08G69/16Preparatory processes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/04Carbon
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01FCHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00General methods for the manufacture of artificial filaments or the like
    • D01F1/02Addition of substances to the spinning solution or to the melt
    • D01F1/10Other agents for modifying properties

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  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Artificial Filaments (AREA)

Abstract

The invention provides graphene quantum dot reinforced polyarmide fiber and a preparation method thereof. The mechanical property of PA6 fiber is improved through the molecular template effect of graphene quantum dots and the staggered effect between graphene quantum dots and a PA6 texture structure; the high-strength and high-modulus PA6-GQD compound fiber with tensile strength of 0.72-1.05 GPa and initial modulus of 8-11 GPa is prepared through a traditional mature PA6 melt spinning process. Compared with traditional high-strength and high-modulus PA6 fiber, the graphene quantum dot reinforced polyarmide fiber has the advantages that the mechanical performance is more excellent, the technological process is simple, environment pollution is small, cost is low, the fiber is suitable for being produced on a large scale, an existing PA6 melt spinning process device does not need to be changed, the prepared PA6-GQD fiber has excellent mechanical performance, and the fiber can be used for the fields of tire curtain wires, industrial cloth, clothes, fishing nets and military war industry.

Description

A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof
Technical field
The invention belongs to composite fibre technology field, relate to a kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof.
Background technology
Polyamide fiber is commonly called as nylon, English name Polyamide (be called for short PA), be on molecular backbone containing recurring amide radical group-[NHCO]-thermoplastic resin general name.Polyamide fiber is industrialized synthetic fiber kind the earliest in the world, and its appearance makes assuming an entirely new aspect of textiles, and its synthesis is the important breakthrough of synthetic fiber industry, is also an extremely important milestone of polymer chemistry simultaneously.Wherein polyamide 6 is one of kind be most widely used, and it is mainly used in spinning synthetic fiber, and link configuration is [NH (CH 2) 5cO].Daiamid-6 fiber has that intensity is high, resilience good, endurance, stainability and corrosion-resistant, the resistance to premium properties such as to damage by worms, density is lower than most of fiber species, anti-wear performance is then better than other kinds of synthetic fiber, is commonly used to make clothing socks, medical suture, tire cord, industrial cloth, hawser, conveyer belt, tent, fishing net etc.Main as parachute and other army fabrics in national defence.
Along with the miniaturization of automobile, the high performance of electronic electric equipment, the light-weighted progress faster of machinery, will more Gao Geng great to the demand of daiamid-6 fiber, its some performance can not meet the requirement of relevant industries development.Therefore, for a certain Application Areas, by modification, its some performance must be improved, expands its Application Areas.Early stage polyamide 6 composite material mainly adopts the material such as nano imvite, glass fibre to strengthen.The polyamide 6 composite material that develops into of new carbon has widened road to functionalization future development, carbon nanomaterial reinforced polyamide 6 fibers such as current CNT, Graphene have achieved certain progress, and its mechanics, heat conduction and electric conductivity have had large increase.CNT reinforced polyamide 6 fiber carries out melt spinning after mainly adopting melt blending or in-situ polymerization again, and its strength and modulus improves greatly, but when only having CNT addition lower, effect is better.The main solution application of Graphene reinforced polyamide 6 fiber is blended, spinning again after melt blending or in-situ polymerization, but because the graphene microchip radial dimension adopted is larger, mostly there is the dispersiveness of Graphene in polyamide 6 good not, easy generation is reunited or the problem such as fold and affect interface cohesion effect, greatly have impact on the further raising of fibre property.
Graphene quantum dot (Graphenequantumdot, be abbreviated as GQD) be the nano material (two dimensional surface size <100nm) of accurate zero dimension, the motion of its internal electron in all directions is all very active, show more significant nanoscale effect, to high molecular crystallization and orientation behavioral implications more strong compared with other carbon nanomaterials.Find that graphene quantum dot Surface chemical functional group of wood density is high through our group study, easy and the structural amide group of polyamide 6 molecular backbone forms covalent bond or hydrogen bond action, increase the interaction between polyamide 6 molecular backbone, improve the secondary bond power between strand; The planar structure radius of turn of graphene quantum dot is little in addition, is extremely conducive to the orientation of self and induces orientation and the ordered arrangement of polyamide 6 macromolecular chain, improve the degree of crystallinity of daiamid-6 fiber and the regularity of crystalline region; Function specific to above-mentioned two aspect graphene quantum dots all has very significant mechanics to strengthen effect to daiamid-6 fiber.
Summary of the invention
The object of the present invention is to provide a kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, solve Graphene dispersed imperfect problem in composite fibre, polyamide fiber prepared by the method have lightweight, intensity good, modulus advantages of higher.
For the preparation method of a kind of graphene quantum dot reinforced polyamide fiber of the present invention, the technical scheme of employing is such, and the method comprises the following steps:
The preparation of first step polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) get graphene quantum dot 0.1 ~ 1 weight portion, dispersant 0.1 ~ 1 weight portion, be dissolved in the deionized water of 98 ~ 99.8 weight portions, the graphite flake layer of described graphene quantum dot is 1 ~ 3 layer, is of a size of 10 ~ 100nm; Through ultrasonic disperse, obtain the homodisperse graphene quantum dot aqueous solution; Described ultrasonic disperse is operating as ultrasonic wave dispersion or high-pressure homogeneous process, adopts ultrasonic cell disruption instrument, its power 1000 ~ 4000W; Or employing superhigh-voltage homogenizing machine, its power is 2500W;
2) the above-mentioned graphene quantum dot aqueous solution is obtained the graphene quantum dot containing dispersant after vacuum filtration, vacuumize; The described vacuum filtration time is 0.5-2h, and vacuumize temperature is 60-100 DEG C, and drying time is 0.5-2h;
3) get caprolactam 84 ~ 99 weight portion, above-mentioned graphene quantum dot 0.5-15 weight portion, add initator 0.5 ~ 1 weight portion, stirring, ultrasonic disperse, be mixed with PA6-GQD mixture; Described initator is the one in 6-aminocaprolc acid, butyric acid, phosphoric acid; Described dispersant be following a) ~ c) in statement any one situation: a) polyethenoxy ether class or ester class tween, b) Sulfonates, Sulfates, phosphate or phosphite anionoid activating agent, the mixture of one or more arbitrary proportions c) in amino acids, imidazoles, oxidation amine amphoteric surfactant;
4) by above-mentioned mixed liquor through steps such as prepolymerization, polymerization, granulation, washing, vacuumizes, obtained PA6-GQD master batch;
Described prepolymerization temperature is 150-200 DEG C, and the time is 1-3h; Polymerization temperature is 250-270 DEG C, and the time is 10-30h; Vacuumize temperature is 60-100 DEG C, and drying time is 2-5h;
Second step melt spinning
1) above-mentioned PA6-GQD master batch 1 ~ 10 weight portion, pure polyamide 6 about 10 ~ 20 weight portion are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre; In described melt spinning process, spinning temperature is 220 ~ 280 DEG C, different according to purposes, oils, curling and/or cut off to PA6-GQD composite fibre.
For a kind of graphene quantum dot reinforced polyamide fiber of the present invention, this fortifying fibre is prepared from by said method.
The present invention utilize the molecular template effect of graphene quantum dot and and PA6 texture between the dislocation effect that formed promote the mechanical property of PA6 fiber, having prepared TENSILE STRENGTH by the PA6 melt spinning process that tradition is ripe is 0.72 ~ 1.05GPa, and initial modulus is the PA6-GQD composite fibre of the high strength and modulus of 8 ~ 11GPa.Compared with traditional high-strength and high-modulus PA6 fiber; its mechanical property is more excellent; and technological process is simple, environmental pollution is little, cost is low and applicable large-scale production; and without the need to changing existing PA6 melt spinning process equipment; obtained PA6-GQD fiber has excellent mechanical property, can be used for the fields such as tire cord, industrial cloth, clothes, fishing net and defence and military.
Accompanying drawing explanation
Fig. 1 is a kind of graphene quantum dot reinforced polyamide fiber producing processes flow chart.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention and be only limitted to following embodiment.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, make various replacement and change, all should be included in protection scope of the present invention.
Embodiment 1:
A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, its preparation method comprises the following steps as shown in Figure 1:
1. the preparation of polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) graphene quantum dot 6g, lauryl sodium sulfate 6g is got, be dissolved in the water of 588g, mechanical agitation 3h, and coordinate ultrasonic disperse (to use ultrasonic cell disruption instrument, its power 4000W), be mixed with the homodisperse graphene quantum dot aqueous solution;
The graphite flake layer of the graphene quantum dot adopted in this step is 1 ~ 3 layer, is of a size of 10 ~ 100nm;
2) the above-mentioned graphene quantum dot aqueous solution is drained through vacuum filtration 1h the graphene quantum dot put into after moisture and to obtain after vacuumize 1h at vacuum drying chamber 100 DEG C containing dispersant;
3) get caprolactam 89g, above-mentioned graphene quantum dot 10.1g, add 6-aminocaprolc acid 0.9g, be heated to 100 DEG C, mechanical agitation 3h, and coordinate ultrasonic disperse (power 2000W), be mixed with PA6-GQD mixture;
4) above-mentioned mixed liquor is obtained prepolymer at 150 DEG C of prepolymerization 3h, be then polymerized 20h at 260 DEG C; The Small molecular or oligomer and initator that are not fully polymerized is washed away respectively, vacuumize 5h at 60 DEG C, obtained PA6-GQD master batch with deionized water and ethanol.
2. melt spinning
1) above-mentioned PA6-GQD master batch 60g, pure polyamide 6 section 240g are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre.In melt spinning process, spinning temperature is 220 DEG C.
The fracture strength of the present embodiment gained composite fibre is 0.83GPa, and initial modulus is 11GPa.
Embodiment 2:
A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, its preparation method comprises the following steps as shown in Figure 1:
1. the preparation of polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) graphene quantum dot 3g, polyoxyethylene nonylphenol ether (OP-10) 3g is got, be dissolved in the water of 494g, mechanical agitation 2.5h, and through high pressure homogenizer dispersion (superhigh-voltage homogenizing machine JN-10HC, its power 2500W), be mixed with the homodisperse graphene quantum dot aqueous solution;
The graphite flake layer of the graphene quantum dot adopted in this step is 1 ~ 3 layer, is of a size of 10 ~ 100nm;
2) the above-mentioned graphene quantum dot aqueous solution is drained through vacuum filtration 0.5h the graphene quantum dot put into after moisture and to obtain after vacuumize 2h at vacuum drying chamber 80 DEG C containing dispersant;
3) get caprolactam 94g, above-mentioned graphene quantum dot 5.05g, add phosphoric acid 0.95g, be heated to 100 DEG C, mechanical agitation 3h, and coordinate ultrasonic disperse (power 2000W), be mixed with PA6-GQD mixture;
4) above-mentioned mixed liquor is obtained prepolymer at 180 DEG C of prepolymerization 3h, be then polymerized 12h at 250 DEG C; The Small molecular or oligomer and initator that are not fully polymerized is washed away respectively, vacuumize 4h at 80 DEG C, obtained PA6-GQD master batch with deionized water and ethanol.
2. melt spinning
1) above-mentioned PA6-GQD master batch 60g, pure polyamide 6 section 240g are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre.In melt spinning process, spinning temperature is 250 DEG C.
The fracture strength of the present embodiment gained composite fibre is 1.05GPa, and initial modulus is 10.2GPa.
Embodiment 3:
A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, its preparation method comprises the following steps as shown in Figure 1:
1. the preparation of polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) graphene quantum dot 4g, lauryl sodium sulfate 2g is got, be dissolved in the water of 494g, mechanical agitation 3h, and coordinate ultrasonic disperse (to use ultrasonic cell disruption instrument, its power 2000W), be mixed with the homodisperse graphene quantum dot aqueous solution;
The graphite flake layer of the graphene quantum dot adopted in this step is 1 ~ 3 layer, is of a size of 10 ~ 100nm;
2) the above-mentioned graphene quantum dot aqueous solution is drained through vacuum filtration 0.5h the graphene quantum dot put into after moisture and to obtain after vacuumize 2h at vacuum drying chamber 80 DEG C containing dispersant;
3) get caprolactam 94.5g, above-mentioned graphene quantum dot 4.55g, add butyric acid 0.95g, be heated to 100 DEG C, mechanical agitation 3h, and coordinate ultrasonic disperse (power 2000W), be mixed with PA6-GQD mixture;
4) above-mentioned mixed liquor is obtained prepolymer at 180 DEG C of prepolymerization 3h, be then polymerized 12h at 250 DEG C; The Small molecular or oligomer and initator that are not fully polymerized is washed away respectively, vacuumize 4h at 80 DEG C, obtained PA6-GQD master batch with deionized water and ethanol.
2. melt spinning
1) above-mentioned PA6-GQD master batch 60g, pure polyamide 6 section 240g are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre.In melt spinning process, spinning temperature is 250 DEG C.
The fracture strength of the present embodiment gained composite fibre is 0.88GPa, and initial modulus is 10.5GPa.
Embodiment 4:
A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, its preparation method comprises the following steps as shown in Figure 1:
1. the preparation of polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) graphene quantum dot 2g, alkyl phenol polyethenoxy ether sodium sulfate 2g is got, be dissolved in the water of 496g, mechanical agitation 2h, and coordinate ultrasonic disperse (to use ultrasonic cell disruption instrument, its power 2000W), be mixed with the homodisperse graphene quantum dot aqueous solution;
The graphite flake layer of the graphene quantum dot adopted in this step is 1 ~ 3 layer, is of a size of 10 ~ 100nm;
2) the above-mentioned graphene quantum dot aqueous solution is drained through vacuum filtration 0.5h the graphene quantum dot put into after moisture and to obtain after vacuumize 2h at vacuum drying chamber 80 DEG C containing dispersant;
3) get caprolactam 97g, above-mentioned graphene quantum dot 2g, add 6-aminocaprolc acid 1g, be heated to 100 DEG C, mechanical agitation 3h, and coordinate ultrasonic disperse (power 2000W), be mixed with PA6-GQD mixture;
4) above-mentioned mixed liquor is obtained prepolymer at 180 DEG C of prepolymerization 3h, be then polymerized 12h at 250 DEG C; The Small molecular or oligomer and initator that are not fully polymerized is washed away respectively, vacuumize 4h at 80 DEG C, obtained PA6-GQD master batch with deionized water and ethanol.
2. melt spinning
1) above-mentioned PA6-GQD master batch 60g, pure polyamide 6 section 240g are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre.In melt spinning process, spinning temperature is 250 DEG C.
The fracture strength of the present embodiment gained composite fibre is 0.81GPa, and initial modulus is 8.9GPa.
Embodiment 5:
A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, its preparation method comprises the following steps as shown in Figure 1:
1. the preparation of polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) graphene quantum dot 1g, lauryl sodium sulfate 0.5g is got, be dissolved in the water of 498.5g, mechanical agitation 3h, and through high pressure homogenizer dispersion (superhigh-voltage homogenizing machine JN-10HC, its power 2500W), be mixed with the homodisperse graphene quantum dot aqueous solution;
The graphite flake layer of the graphene quantum dot adopted in this step is 1 ~ 3 layer, is of a size of 10 ~ 100nm;
2) the above-mentioned graphene quantum dot aqueous solution is drained through vacuum filtration 1h the graphene quantum dot put into after moisture and to obtain after vacuumize 1h at vacuum drying chamber 60 DEG C containing dispersant;
3) get caprolactam 99.0g, above-mentioned graphene quantum dot 0.5g, add 6-aminocaprolc acid 0.5g, be heated to 100 DEG C, mechanical agitation 3h, and coordinate ultrasonic disperse (power 2000W), be mixed with PA6-GQD mixture;
4) above-mentioned mixed liquor is obtained prepolymer at 200 DEG C of prepolymerization 1h, be then polymerized 10h at 270 DEG C; The Small molecular or oligomer and initator that are not fully polymerized is washed away respectively, vacuumize 2h at 100 DEG C, obtained PA6-GQD master batch with deionized water and ethanol.
2. melt spinning
1) above-mentioned PA6-GQD master batch 150g, pure polyamide 6 section 150g are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre.In melt spinning process, spinning temperature is 270 DEG C.
The fracture strength of the present embodiment gained composite fibre is 0.78GPa, and initial modulus is 8.3GPa.
Embodiment 6:
A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, its preparation method comprises the following steps as shown in Figure 1:
1. the preparation of polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) graphene quantum dot 3g, alkyl phenol polyethenoxy ether sodium sulfate 1.5g is got, be dissolved in the water of 495.5g, mechanical agitation 3h, and coordinate ultrasonic disperse (to use ultrasonic cell disruption instrument, its power 2000W), be mixed with the homodisperse graphene quantum dot aqueous solution;
The graphite flake layer of the graphene quantum dot adopted in this step is 1 ~ 3 layer, is of a size of 10 ~ 100nm;
2) the above-mentioned graphene quantum dot aqueous solution is drained through vacuum filtration 0.5h the graphene quantum dot put into after moisture and to obtain after vacuumize 2h at vacuum drying chamber 80 DEG C containing dispersant;
3) get caprolactam 96g, above-mentioned graphene quantum dot 3g, add phosphatase 11 g, be heated to 100 DEG C, mechanical agitation 3h, and coordinate ultrasonic disperse (power 2000W), be mixed with PA6-GQD mixture;
4) above-mentioned mixed liquor is obtained prepolymer at 180 DEG C of prepolymerization 3h, be then polymerized 12h at 250 DEG C; The Small molecular or oligomer and initator that are not fully polymerized is washed away respectively, vacuumize 4h at 80 DEG C, obtained PA6-GQD master batch with deionized water and ethanol.
2. melt spinning
1) above-mentioned PA6-GQD master batch 60g, pure polyamide 6 section 240g are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre.In melt spinning process, spinning temperature is 250 DEG C.
The fracture strength of the present embodiment gained composite fibre is 0.87GPa, and initial modulus is 9.5GPa.
Embodiment 7:
A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, its preparation method comprises the following steps as shown in Figure 1:
1. the preparation of polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) graphene quantum dot 12g, lauryl sodium sulfate 6g is got, be dissolved in the water of 1182g, mechanical agitation 3h, and coordinate ultrasonic disperse (to use ultrasonic cell disruption instrument, its power 3000W), be mixed with the homodisperse graphene quantum dot aqueous solution;
The graphite flake layer of the graphene quantum dot adopted in this step is 1 ~ 3 layer, is of a size of 10 ~ 100nm;
2) the above-mentioned graphene quantum dot aqueous solution is drained through vacuum filtration 2h the graphene quantum dot put into after moisture and to obtain after vacuumize 1h at vacuum drying chamber 100 DEG C containing dispersant;
3) get caprolactam 84g, above-mentioned graphene quantum dot 15.0g, add butyric acid 1.0g, be heated to 100 DEG C, mechanical agitation 3h, and coordinate ultrasonic disperse (power 2000W), be mixed with PA6-GQD mixture;
4) above-mentioned mixed liquor is obtained prepolymer at 180 DEG C of prepolymerization 2h, then polyase 13 0h at 250 DEG C; The Small molecular or oligomer and initator that are not fully polymerized is washed away respectively, vacuumize 3h at 80 DEG C, obtained PA6-GQD master batch with deionized water and ethanol.
2. melt spinning
1) above-mentioned PA6-GQD master batch 20g, pure polyamide 6 section 400g are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre.In melt spinning process, spinning temperature is 280 DEG C.
The fracture strength of the present embodiment gained composite fibre is 0.88GPa, and initial modulus is 9.8GPa.
Embodiment 8:
A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, its preparation method comprises the following steps as shown in Figure 1:
1. the preparation of polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) graphene quantum dot 3g, polyoxyethylene nonylphenol ether (OP-10) 1.5g is got, be dissolved in the water of 495.5g, mechanical agitation 3h, and coordinate ultrasonic disperse (to use ultrasonic cell disruption instrument, its power 2000W), be mixed with the homodisperse graphene quantum dot aqueous solution;
The graphite flake layer of the graphene quantum dot adopted in this step is 1 ~ 3 layer, is of a size of 10 ~ 100nm;
2) the above-mentioned graphene quantum dot aqueous solution is drained through vacuum filtration 0.5h the graphene quantum dot put into after moisture and to obtain after vacuumize 2h at vacuum drying chamber 80 DEG C containing dispersant;
3) get caprolactam 95g, above-mentioned graphene quantum dot 4.05g, add phosphoric acid 0.95g, be heated to 100 DEG C, mechanical agitation 3h, and coordinate ultrasonic disperse (power 2000W), be mixed with PA6-GQD mixture;
4) above-mentioned mixed liquor is obtained prepolymer at 180 DEG C of prepolymerization 3h, be then polymerized 12h at 250 DEG C; The Small molecular or oligomer and initator that are not fully polymerized is washed away respectively, vacuumize 4h at 80 DEG C, obtained PA6-GQD master batch with deionized water and ethanol.
2. melt spinning
1) above-mentioned PA6-GQD master batch 60g, pure polyamide 6 section 240g are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre.In melt spinning process, spinning temperature is 250 DEG C.
The fracture strength of the present embodiment gained composite fibre is 0.92GPa, and initial modulus is 10.1GPa.
Embodiment 9:
A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, its preparation method comprises the following steps as shown in Figure 1:
1. the preparation of polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) graphene quantum dot 4g, lauryl sodium sulfate 4g is got, be dissolved in the water of 492g, mechanical agitation 3h, and through high pressure homogenizer dispersion (superhigh-voltage homogenizing machine JN-10HC, its power 2500W), be mixed with the homodisperse graphene quantum dot aqueous solution;
The graphite flake layer of the graphene quantum dot adopted in this step is 1 ~ 3 layer, is of a size of 10 ~ 100nm;
2) the above-mentioned graphene quantum dot aqueous solution is drained through vacuum filtration 0.5h the graphene quantum dot put into after moisture and to obtain after vacuumize 2h at vacuum drying chamber 80 DEG C containing dispersant;
3) get caprolactam 92g, above-mentioned graphene quantum dot 7.1g, add butyric acid 0.9g, be heated to 100 DEG C, mechanical agitation 3h, and coordinate ultrasonic disperse (power 2000W), be mixed with PA6-GQD mixture;
4) above-mentioned mixed liquor is obtained prepolymer at 180 DEG C of prepolymerization 3h, be then polymerized 12h at 250 DEG C; The Small molecular or oligomer and initator that are not fully polymerized is washed away respectively, vacuumize 4h at 80 DEG C, obtained PA6-GQD master batch with deionized water and ethanol.
2. melt spinning
1) above-mentioned PA6-GQD master batch 60g, pure polyamide 6 section 240g are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre.In melt spinning process, spinning temperature is 250 DEG C.
The fracture strength of the present embodiment gained composite fibre is 0.85GPa, and initial modulus is 10.7GPa.
Embodiment 10:
A kind of graphene quantum dot reinforced polyamide fiber and preparation method thereof, its preparation method comprises the following steps as shown in Figure 1:
1. the preparation of polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) graphene quantum dot 1g, polyoxyethylene nonylphenol ether (OP-10) 1g is got, be dissolved in the water of 998g, mechanical agitation 3h, and coordinate ultrasonic disperse (to use ultrasonic cell disruption instrument, its power 1000W), be mixed with the homodisperse graphene quantum dot aqueous solution;
The graphite flake layer of the graphene quantum dot adopted in this step is 1 ~ 3 layer, is of a size of 10 ~ 100nm;
2) the above-mentioned graphene quantum dot aqueous solution is drained through vacuum filtration 0.5h the graphene quantum dot put into after moisture and to obtain after vacuumize 0.5h at vacuum drying chamber 80 DEG C containing dispersant;
3) get caprolactam 97.5g, above-mentioned graphene quantum dot 1.5g, add phosphatase 11 g, be heated to 100 DEG C, mechanical agitation 3h, and coordinate ultrasonic disperse (power 2000W), be mixed with PA6-GQD mixture;
4) above-mentioned mixed liquor is obtained prepolymer at 160 DEG C of prepolymerization 2h, be then polymerized 15h at 260 DEG C; The Small molecular or oligomer and initator that are not fully polymerized is washed away respectively, vacuumize 4h at 60 DEG C, obtained PA6-GQD master batch with deionized water and ethanol.
2. melt spinning
1) above-mentioned PA6-GQD master batch 30g, pure polyamide 6 section 300g are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre.In melt spinning process, spinning temperature is 260 DEG C.
The fracture strength of the present embodiment gained composite fibre is 0.78GPa, and initial modulus is 8.0GPa.

Claims (2)

1. a graphene quantum dot reinforced polyamide fiber producing processes, is characterized in that the method comprises the following steps:
The preparation of first step polyamide 6-graphene quantum dot (PA6-GQD) master batch
1) get graphene quantum dot 0.1 ~ 1 weight portion, dispersant 0.1 ~ 1 weight portion, be dissolved in the deionized water of 98 ~ 99.8 weight portions, the graphite flake layer of described graphene quantum dot is 1 ~ 3 layer, is of a size of 10 ~ 100nm; Through ultrasonic disperse, obtain the homodisperse graphene quantum dot aqueous solution; Described ultrasonic disperse is operating as ultrasonic wave dispersion or high-pressure homogeneous process, adopts ultrasonic cell disruption instrument, its power 1000 ~ 4000W; Or employing superhigh-voltage homogenizing machine, its power is 2500W;
2) the above-mentioned graphene quantum dot aqueous solution is obtained the graphene quantum dot containing dispersant after vacuum filtration, vacuumize; The described vacuum filtration time is 0.5-2h, and vacuumize temperature is 60-100 DEG C, and drying time is 0.5-2h;
3) get caprolactam 84 ~ 99 weight portion, above-mentioned graphene quantum dot 0.5-15 weight portion, add initator 0.5 ~ 1 weight portion, stirring, ultrasonic disperse, be mixed with PA6-GQD mixture; Described initator is the one in 6-aminocaprolc acid, butyric acid, phosphoric acid; Described dispersant be following a) ~ c) in statement any one situation: a) polyethenoxy ether class or ester class tween, b) Sulfonates, Sulfates, phosphate or phosphite anionoid activating agent, the mixture of one or more arbitrary proportions c) in amino acids, imidazoles, oxidation amine amphoteric surfactant;
4) by above-mentioned mixed liquor through steps such as prepolymerization, polymerization, granulation, washing, vacuumizes, obtained PA6-GQD master batch;
Described prepolymerization temperature is 150-200 DEG C, and the time is 1-3h; Polymerization temperature is 250-270 DEG C, and the time is 10-30h; Vacuumize temperature is 60-100 DEG C, and drying time is 2-5h;
Second step melt spinning
1) above-mentioned PA6-GQD master batch 1 ~ 10 weight portion, pure polyamide 6 about 10 ~ 20 weight portion are added in screw extruder extrude after melt blending, make section;
2) common melt spinning machine is adopted to carry out melt spinning, preparation PA6-GQD composite fibre; In described melt spinning process, spinning temperature is 220 ~ 280 DEG C, different according to purposes, oils, curling and/or cut off to PA6-GQD composite fibre.
2. a graphene quantum dot reinforced polyamide fiber, is characterized in that this fortifying fibre is prepared from by the method for claim 1.
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