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A preparation method based on graphene-enhanced flame-retardant recycled polyester staple fiber

A technology of recycled polyester and graphene, applied in the direction of single-component polyester artificial filaments, etc., can solve the problems of poor mechanical properties of recycled polyester fibers, and achieve good spinning shape, excellent fiber quality, and superior electrical conductivity Effect

Active Publication Date: 2016-07-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method based on graphene-enhanced flame-retardant recycled polyester short fibers to solve the problem of poor mechanical properties of existing recycled polyester fibers

Method used

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  • A preparation method based on graphene-enhanced flame-retardant recycled polyester staple fiber

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Preparation of graphene masterbatch

[0037] Graphene is treated with surface sulfonic acid group functionalization, the particle size of graphene is 500nm~1000nm, graphene and polyvinylpyrrolidone are stirred, mixed and dispersed according to the mass ratio of 2:1 to obtain graphene particles; graphene particles are added In the polyester powder, the addition of graphene particles is 10% of the quality of the polyester powder, and the graphene masterbatch is produced by a twin-screw granulation process;

[0038] (2) Preparation of phosphorus-based halogen-free flame-retardant masterbatch

[0039] The mixture of N-methylolpropionamide methyl phosphonate and dimethyl methyl phosphonate with a particle size of 0.1 ~ 8um is mixed with polyester powder at high speed, and then the phosphorus-containing particles are produced through a screw granulation process. The phosphorus content of the flame retardant masterbatch is 60000ppm;

[0040] (3) According to the mass per...

Embodiment 2

[0046] (1) Preparation of graphene masterbatch

[0047] Graphene is functionalized with surface sulfonic acid groups, and the particle size of graphene is 500nm to 1000nm. According to the mass ratio of 5:1, graphene and tetracyanodimethylbenzoquinone are stirred, mixed and dispersed to obtain graphene particles; Graphene particles are added in the polyester powder, the addition of graphene particles is 15% of the quality of the polyester powder, and the graphene masterbatch is obtained by a twin-screw granulation process;

[0048] (2) Preparation of phosphorus-based halogen-free flame-retardant masterbatch

[0049] Mix hydroxyethylphenylphosphinic acid with a particle size of 0.1-8um and polyester powder at high speed to produce phosphorus-containing particles through a screw granulation process. The phosphorus content of the flame-retardant masterbatch is 100,000ppm;

[0050] (3) According to the mass percentage, take 2% graphene masterbatch, 8% phosphorus-based halogen-fre...

Embodiment 3

[0056] (1) Preparation of graphene masterbatch

[0057] Graphene is treated with surface sulfonic acid group functionalization, the particle size of graphene is 500nm~1000nm, graphene and polyvinyl alcohol are stirred, mixed and dispersed according to the mass ratio of 1:1 to obtain graphene particles; graphene particles are added to In the polyester powder, the addition of graphene particles is 20% of the quality of the polyester powder, and the graphene masterbatch is produced by a twin-screw granulation process;

[0058] (2) Preparation of phosphorus-based halogen-free flame-retardant masterbatch

[0059] Phosphorus-containing granules are produced by mixing reactive phosphorus-based halogen-free flame retardants with polyester powder at high speed, and the phosphorus content of the flame-retardant masterbatch is 80,000ppm;

[0060] (3) Mix and dry graphene masterbatch and phosphorus-based halogen-free flame-retardant masterbatch with recycled polyester raw materials accor...

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Abstract

The invention provides a preparation method of a graphene based reinforced and flame-retarded recycled polyester staple fiber. The method comprises the following steps: preparing graphene master batch; preparing phosphate based halogen-free flame retardant master batch; weighing the graphene master batch and the phosphate based halogen-free flame retardant master batch, mixing with a recycled polyester raw material, drying, feeding molten dried raw materials into an impurity removal stirrer under the action of a screw extruder by a melt pump for carrying out homogenization impurity-removal treatment, feeding a homogenized and impurity-removal polyester melt into a secondary filter by the melt pump, enabling a filtered melt to pass through a mixed melt on a pipeline to enter a spinning manifold, carrying out drafting processing on a spun fiber to obtain the reinforced and flame-retarded recycled polyester fiber, cutting off bundles and packaging. The reinforced and flame-retarded recycled polyester chip has the good spinning forming property, the fiber quality is high, the using amount of a fire retardant can be effectively reduced under the synergistic effect of grapheme and the phosphate based flame retardant, the cost is reduced, the reinforcement effect can be achieved and the mechanical property of the fiber is effectively improved.

Description

technical field [0001] The invention belongs to the field of recycled polyester fiber materials, in particular to a method for preparing graphene-based reinforced flame-retardant recycled polyester short fibers. Background technique [0002] At present, recycled polyester fiber is strongly supported by various departments of the state and has developed rapidly due to its environmental protection, greenness, and obvious price competitive advantage (compared with virgin polyester fiber). Regenerated polyester fiber is obtained by removing bottle caps, labels and additives from polyester bottle flakes, and then using physical or chemical methods to process the bottle flakes. Polyester fiber is a kind of molten flammable fiber. It is necessary and urgent to carry out flame-retardant treatment on recycled polyester fiber to reduce its fire hazard. [0003] The flame retardant modification methods of polyester mainly include several methods such as copolymerization, blending, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10
Inventor 姚正军杜咪咪周金堂兰天宁刘沛江王占红姚芮徐丹李琳姚田甜
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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