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Preparation method of graphene-polyurethane composite fiber

A composite fiber and graphene technology, applied in the field of spinning, can solve problems such as low uniformity, achieve high uniformity, excellent mechanical properties, and improve compatibility.

Inactive Publication Date: 2019-01-04
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defect of low uniformity in the preparation of composite fibers by spinning graphene and polyurethane, the present invention proposes a method for preparing graphene-polyurethane composite fibers, which utilizes the characteristics of fast photocuring reaction and uses UV irradiation to make polyurethane solidify quickly , and then prevent the fibers from bonding to each other, the uniformity of the obtained composite fiber is more excellent, and the mechanical properties of the obtained composite fiber are more excellent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh the low-viscosity liquid polyester diol and diisocyanate according to the total mole ratio of 4:1, react to form an isocyanate-terminated prepolymer, add the solvent toluene and mix to form a polyurethane prepolymer solution; the amount of toluene added 20% of the mass of the prepolymer.

[0029] (2) Add 0.05 parts by weight of benzoin dimethyl ether and 3 parts by weight of methyl acrylate to 5 parts by weight of polyurethane prepolymer solution, mix and heat to 45°C, and introduce benzoin ether groups into the molecular chain of the polyurethane prepolymer , to obtain a modified low-viscosity polyurethane prepolymer;

[0030] (3) Mix, disperse and stir the modified polyurethane prepolymer with graphene and photoinitiator thionyl chloride, wherein the mass ratio of the modified polyurethane prepolymer to graphene and photoinitiator is 8:1 : 0.8, the graphene is fully impregnated and compounded to obtain a graphene-containing precursor material;

[0031] (4)...

Embodiment 2

[0033] (1) Weigh low-viscosity polyether diol and diisocyanate according to the total mole ratio of 2:1, react to form an isocyanate-terminated prepolymer, add a solvent and mix to form a polyurethane prepolymer solution;

[0034] (2) Add 0.05 parts by weight of benzoin dimethyl ether and 3 parts by weight of methyl acrylate to 7 parts by weight of polyurethane prepolymer solution, mix and heat to 40°C, and introduce photosensitive group benzoin into the molecular chain of the polyurethane prepolymer. ether groups to obtain modified low-viscosity polyurethane prepolymers;

[0035] (3) Mix, disperse, and stir the modified polyurethane prepolymer with graphene and photoinitiator phosphine pentachloride, wherein the mass ratio of the modified polyurethane prepolymer to graphene and photoinitiator is 12:1 : 0.6, the graphene is fully impregnated and compounded to obtain a graphene-containing precursor material;

[0036] (4) Spinning the precursor material by dipping and mixing. The...

Embodiment 3

[0038] (1) Weigh the low-viscosity liquid polyether diol and diisocyanate according to the total mole ratio of 3:1, react to form an isocyanate-terminated prepolymer, add a solvent and mix to form a polyurethane prepolymer solution;

[0039] (2) 0.08 parts by weight of dno-717 and 3 parts by weight of methyl acrylate were added to 7 parts by weight of polyurethane prepolymer solution, and anthracene chromophore was introduced into the molecular chain of the polyurethane prepolymer to obtain a modified low viscosity Polyurethane prepolymer;

[0040] (3) Mixing, dispersing and stirring the modified polyurethane prepolymer with graphene and photoinitiator phosphorus tribromide, wherein the mass ratio of the modified polyurethane prepolymer to graphene and photoinitiator is 8:1 : 0.2, the graphene is fully impregnated and compounded to obtain a graphene-containing precursor material;

[0041] (4) Spinning the precursor material by dipping and mixing. The spinning process is to fi...

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Abstract

The invention provides a preparation method of a graphene-polyurethane composite fiber. Low-viscosity liquid dihydric alcohol and liquid diisocyanate are taken as raw materials to prepare a polyurethane prepolymer, and then photosensitive groups are introduced on molecular chains of the polyurethane prepolymer to obtain the modified low-viscosity polyurethane prepolymer; the obtained modified polyurethane prepolymer is mixed with graphene and photoinitiator to be dispersed and stirred so that the graphene is fully impregnated and compounded, then spinning is performed on the impregnated and mixed material, then UV irradiation is utilized, so that the photocurable polyurethane prepolymer on the surface of the fiber reacts and is solidified to obtain the graphene / polyurethane composite fiber. The preparation method of the graphene-polyurethane composite fiber has the advantages that the defect of lower uniformity when the composite fiber is prepared by spinning the graphene and polyurethane is overcome, the bonding strength between the polyurethane and the graphene is improved by photocuring of the polyurethane, the process is continuous and rapid, and the uniformity of the preparedcomposite fiber is high.

Description

technical field [0001] The invention relates to the technical field of spinning, in particular to a preparation method of a graphene-polyurethane composite fiber. Background technique [0002] Polyurethane is a block copolymer obtained by the stepwise addition reaction of polyisocyanate and polyol, followed by chain extension and crosslinking. At room temperature, polyurethane exists in various forms such as elastomers, foamed plastics, coatings, etc., which greatly broadens the scope of use of polyurethane. According to the different preparation methods and product forms, polyurethane is mainly divided into three forms: thermoplastic polyurethane, polyurethane foam material and water-based polyurethane. [0003] Graphene is a carbon material composed of a single layer of carbon atoms and has a two-dimensional honeycomb structure. It is the basic unit of graphite materials and has excellent mechanical, thermal, optoelectronic and other properties. It is used as a filler for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10
CPCD01F6/94D01F1/10
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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