Preparation method for graphene/nylon 6 nano composite material

A nanocomposite material and graphene technology, which is applied in the field of preparation of graphene/nylon 6 nanocomposite materials, can solve the problems of unfavorable large-scale preparation of graphene/nylon 6, increase in molecular weight, difficulty in polymerization, etc., and achieve large lateral size , comprehensive performance improvement, and the effect of improving compatibility

Inactive Publication Date: 2017-12-26
HANGZHOU GAOXI TECH CO LTD
2 Cites 16 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0005] In addition, the methods reported so far for the preparation of graphene/nylon 6 composites by in situ polymerization of graphene oxide dispersion and caprolactam are all based on the preparation process of batch reactors, and the polymerization system contains a large amount of water.
In the industry, most production lines of ...
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Abstract

The invention relates to a preparation method for a graphene/nylon 6 nano composite material. The graphene/nylon 6 composite material is obtained by performing in-situ polymerization on pleated-sphere-shaped oxidized graphene and caprolactam. In ring opening condensation polymerization period of a caprolactam monomer, the pleated-sphere-shaped oxidized graphene is gradually dissociated into single-layer oxidized graphene sheets, the single-layer oxidized graphene sheets are reacted with nylon 6 molecules to form covalent grafting, and at the same time thermal reduction is performed on the oxidized graphene. According to the invention, just a small number of the pleated-sphere-shaped oxidized graphene is added, thus mechanical properties, high-temperature resistance and ultraviolet aging resistance of nylon 6 can be remarkably improved, dispersity of the graphene in a polymer substrate is excellent, a usage amount is less, the final product has good machinability, and industrialized multi-tow high-speed spinning can be performed; and besides, the preparation process related by the invention is simple and effective, and suitable for industrialized VK tube polymerization equipment, modification of nylon 6 polymerization equipment does not need, and therefore the preparation method provided by the invention is a production technology which extremely has market competitiveness.

Technology Topic

Cvd grapheneIn situ polymerization +13

Image

  • Preparation method for graphene/nylon 6 nano composite material
  • Preparation method for graphene/nylon 6 nano composite material
  • Preparation method for graphene/nylon 6 nano composite material

Examples

  • Experimental program(13)

Example Embodiment

[0021] Example 1:
[0022] (1) Dry the single-layer graphene oxide dispersion by the atomization drying method to obtain pleated spherical graphene oxide. The atomization temperature is 130°C, the graphene oxide sheet size is 0.3-5 microns, and the average size is 1 micron. The oxygen ratio is 5, and the water content is less than 0.1%;
[0023] (2) Add 3.5 parts by mass of pleated spherical graphene oxide and 2 parts by mass of deionized water to 100 parts by mass of caprolactam melt, stir and mix at a high speed (400 rpm) at 80° C. to form a dispersion;
[0024] (3) Under the protection of nitrogen, put the above dispersion into the polycondensation reactor, and heat to 250-270℃, react at 0.5-1MPa for 3 hours; then react under vacuum for 4 hours to obtain a polymer melt; The polymer melt is water-cooled and pelletized to obtain a graphene/nylon 6 nanocomposite material.
[0025] High-speed spinning with this material to obtain Figure 4 Wire roll shown. Due to the high amount of graphene added, the yarn has a high degree of anti-ultraviolet performance and a very low percolation threshold.
[0026] The properties of the obtained graphene/nylon 6 nanocomposite are shown in Table 1.

Example Embodiment

[0027] Example 2:
[0028] (1) Dry the single-layer graphene oxide dispersion by the atomization drying method to obtain pleated spherical graphene oxide, the atomization temperature is 130°C, the size of the graphene oxide sheet is 1-20 microns, and the average size is 10 microns. The carbon to oxygen ratio is 4.2, and the moisture content is less than 0.1%;
[0029] (2) Add 2 parts by mass of pleated spherical graphene oxide and 2 parts by mass of deionized water to 100 parts by mass of the caprolactam melt, stir and mix at a high speed (400 rpm) at 80° C. to form a dispersion;
[0030] (3) Under the protection of nitrogen, put the above dispersion into the polycondensation reactor, and raise the temperature to 250-270℃, and react at 0.5-1MPa for 3 hours; then react under vacuum for 4 hours to obtain a polymer melt; The polymer melt is water-cooled and pelletized to obtain a graphene/nylon 6 nanocomposite material.
[0031] The properties of the obtained graphene/nylon 6 nanocomposite are shown in Table 1.

Example Embodiment

[0032] Example 3:
[0033] (1) Dry the single-layer graphene oxide dispersion by the atomization drying method to obtain pleated spherical graphene oxide, the atomization temperature is 130°C, the size of the graphene oxide sheet is 1-40 microns, and the average size is 20 microns. The carbon to oxygen ratio is 3.9, and the moisture content is less than 0.1%;
[0034] (2) Add 0.5 parts by mass of pleated spherical graphene oxide and 2 parts by mass of deionized water to 100 parts by mass of the caprolactam melt, stir and mix at a high speed (400 rpm) at 80° C. to form a dispersion;
[0035] (3) Under the protection of nitrogen, put the above dispersion into the polycondensation reactor, and raise the temperature to 250-270℃, and react at 0.5-1MPa for 3 hours; then react under vacuum for 4 hours to obtain a polymer melt; The polymer melt is water-cooled and pelletized to obtain a graphene/nylon 6 nanocomposite material.
[0036] The properties of the obtained graphene/nylon 6 nanocomposite are shown in Table 1.
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PUM

PropertyMeasurementUnit
Size1.0 ~ 20.0µm
Size1.0 ~ 40.0µm
Size20.0 ~ 50.0µm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

  • Improve compatibility
  • Good mechanical properties

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Improve overall performanceGood dispersionReduce dosagePolymer substrateGraftingMachinabilityAging resistanceMechanical propertyTemperature resistance
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