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Graphene reinforcing and toughening nylon resin and preparation method thereof

A nylon resin, reinforced and toughened technology, applied in the field of graphene reinforced and toughened nylon resin and its preparation, can solve the problems of increased thermal conductivity, reduced thermal expansion coefficient, large usage, etc., to achieve increased aggregation, improved uniform dispersion, The effect of low electrical performance

Active Publication Date: 2013-05-15
广东道生科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After graphene and resin matrix are combined, the thermal expansion coefficient of the composite material can be reduced, and the thermal conductivity can be greatly increased. Adding an appropriate amount of graphene can significantly improve the mechanical properties of the matrix resin, which overcomes the large amount of general inorganic fillers used and cannot Take into account the disadvantages of simultaneously improving rigidity, heat resistance, dimensional stability, and toughness

Method used

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  • Graphene reinforcing and toughening nylon resin and preparation method thereof
  • Graphene reinforcing and toughening nylon resin and preparation method thereof
  • Graphene reinforcing and toughening nylon resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0017] Embodiment 1-4 (unit: %)

[0018]

[0019] Nylon 6 is dried in a drying hopper at 90-110°C for 3 to 4 hours, and the formula amount of nylon 6 (PA6), phosphorus nitrogen type nylon flame retardant (DS-1), and various additives are mixed in a high-speed mixing hopper After mixing evenly, add it from the mixing port into the twin-screw extruder with the temperature set at 225-275°C, the length-to-diameter ratio (L / D) of 32:1-40:1, and the screw combination according to the process regulations. Vacuum granulation to make graphene nano-modified reinforced nylon 6 resin. The sampled material was dried at 90-110°C for 3-4 hours and then injection molded into a standard sample for performance testing. The performance is shown in Table 2.

[0020] The performance test result of table two embodiment 1-4

[0021]

Embodiment 5-8

[0022] Embodiment 5-8 (unit: %)

[0023]

[0024] Nylon 66 is dried in a drying hopper at 90-110°C for 3-4 hours, and the formula amount of nylon 6 (PA6), phosphorus-nitrogen synergistic nylon flame retardant (DS-1), modified graphene, various After the additives are mixed evenly in the high-speed mixing bucket as required, add them from the mixing port until the temperature is set at 230-280°C, the length-to-diameter ratio (L / D) is 32:1-40:1, and the screw combination is according to the process regulations. In a twin-screw extruder, vacuum granulation is used to make halogen-free glass fiber reinforced nylon 66 resin. The sampled material was dried at 90-110°C for 3-4 hours and then injection molded into a standard sample for performance testing. The performance is shown in Table 4.

[0025] The performance test result of table four embodiment 5-8

[0026]

[0027]

[0028] The amount and distribution of nylon 66 (PA66) or nylon 6 (PA6) in the above-mentioned exam...

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Abstract

The invention discloses graphene reinforcing and toughening nylon resin. The graphene reinforcing and toughening nylon resin comprises the following components in percentage by weight: 68%-76% of nylon 66, 20%-25% of phosphor-nitrogen structure synergistic nylon fire retardant, 1%-5% of modified graphene and 1%-2% of other auxiliaries. The preparation method of the graphene reinforcing and toughening nylon resin comprises the following steps of: carrying out surface pre-treatment on the graphene; mixing the grapheme subjected to surface treatment with various auxiliaries; uniformly mixing the materials in proportion in a high-speed stirring hopper; adding the uniformly mixed materials to a double-screw extruder with setting temperature of 220 DEG C to 280 DEG C and length-diameter ratio (L / D) of 32:1 to 40:1; and vacuumizing the mixer for pelletizing the mixed materials.

Description

technical field [0001] The invention belongs to the technical field of nano-profiles, and in particular relates to a graphene-reinforced and toughened nylon resin and a preparation method thereof. Background technique [0002] Nylon resin is the earliest developed engineering plastic. It has the advantages of toughness, wear resistance, solvent resistance, oil resistance, low melt viscosity, easy availability of raw materials, recyclability and high cost performance. It has a wide range of applications in engineering plastics, fibers and other fields. Graphene, as a two-dimensional carbon crystal discovered in recent years, has outstanding and excellent thermal conductivity, mechanical properties and electrical properties, and its nanostructure is also very unique. Graphene has a large specific surface area, and a small amount of addition can The polymer matrix properties have a significant impact. However, the surface of graphene is in an inert state, and the interface co...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L77/02C08K9/04C08K9/06C08K5/5313C08K5/3492C08K3/04
Inventor 李本立
Owner 广东道生科技股份有限公司
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