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Wave-absorbing polyamide composite material and preparation method thereof

A wave-absorbing polyamide and composite material technology, applied in the field of materials, can solve problems such as difficult dispersion, poor wave-absorbing effect, and easy agglomeration, and achieve the effects of light weight, good wave-absorbing performance, and excellent electrical properties

Pending Publication Date: 2022-04-12
GUANGDONG ALDEX NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, one of the purposes of the present invention is to solve the problem of wave absorbing agent Fe 3 o 4 The problem of easy agglomeration and difficult dispersion in polyamide matrix resin, as well as the defects of poor absorbing effect, provides a wave-absorbing polyamide composite material with excellent mechanical properties and wave-absorbing properties, and its wave-absorbing agent can be very good Dispersed in polyamide matrix resin

Method used

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  • Wave-absorbing polyamide composite material and preparation method thereof
  • Wave-absorbing polyamide composite material and preparation method thereof
  • Wave-absorbing polyamide composite material and preparation method thereof

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Embodiment 1

[0080] Embodiment 1 Absorbing polyamide composite material and preparation method thereof

[0081] The wave-absorbing polyamide composite material of this embodiment is prepared from the following raw materials in parts by weight:

[0082]

[0083]

[0084] The preparation method of the above-mentioned wave-absorbing polyamide composite material comprises the following steps:

[0085] (1), the caprolactam after vacuum drying is joined in the stirring type polymerization reactor, adds Fe at the same time 3 o 4 -Graphene nano-hybrid material, Fe 3 o 4 -Multi-walled carbon nanotube nanocomposites, double grafted ethylene and octene copolymer (HDE-g-POE-g-MGO), benzoic acid, N,N'-bis(2,2,6,6-tetra Methyl-4-piperidinyl)-1,3-benzenedicarboxamide, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphate and appropriate amount of water; then vacuum for 7min , Nitrogen 7min, so circulated 4 times, control the system pressure in the stirred polymerization reactor to b...

Embodiment 2

[0087] Embodiment 2 Absorbing polyamide composite material and preparation method thereof

[0088] The wave-absorbing polyamide composite material of this embodiment is prepared from the following raw materials in parts by weight:

[0089]

[0090] The preparation method of the above-mentioned wave-absorbing polyamide composite material comprises the following steps:

[0091] (1), the caprolactam after vacuum drying is joined in the stirring type polymerization reactor, adds Fe at the same time 3 o 4 -Graphene nano-hybrid material, Fe 3 o 4 -Multi-walled carbon nanotube nanocomposites, double grafted ethylene and octene copolymer (HDE-g-POE-g-MGO), benzoic acid, N,N'-bis(2,2,6,6-tetra Methyl-4-piperidinyl)-1,3-benzenedicarboxamide, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphate and appropriate amount of water; then vacuum for 3min , Nitrogen 3min, so circulated 8 times, control the system pressure in the stirred polymerization reactor to be 0.1MPa;

...

Embodiment 3

[0093] Embodiment 3 wave-absorbing polyamide composite material and preparation method thereof

[0094] The wave-absorbing polyamide composite material of this embodiment is prepared from the following raw materials in parts by weight:

[0095]

[0096] The preparation method of the above-mentioned wave-absorbing polyamide composite material comprises the following steps:

[0097] (1), the caprolactam after vacuum drying is joined in the stirring type polymerization reactor, adds Fe at the same time 3 o 4 -Graphene nano-hybrid material, Fe 3 o 4 -Multi-walled carbon nanotube nanocomposites, double grafted ethylene and octene copolymer (HDE-g-POE-g-MGO), benzoic acid, N,N'-bis(2,2,6,6-tetra Methyl-4-piperidinyl)-1,3-benzenedicarboxamide, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphate and appropriate amount of water; then vacuum for 6min , Nitrogen 6min, so circulated 5 times, control the system pressure in the stirred polymerization reactor to be 0.3MP...

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Abstract

The invention discloses a wave-absorbing polyamide composite material and a preparation method thereof. The wave-absorbing polyamide composite material is synthesized from the following raw materials: caprolactam, a Fe3O4-graphene nano hybrid material, a Fe3O4-multiwalled carbon nanotube nano composite material, a double-grafted ethylene and octylene copolymer, benzoic acid, a main antioxidant and an auxiliary antioxidant. The wave-absorbing polyamide composite material has excellent mechanical property and wave-absorbing property, can be applied to various electronic products, such as televisions, LED display screens, sound equipment, VCD players, computers, digital cameras, game machines, microwave ovens and mobile phones, can reduce electromagnetic wave leakage to be lower than the national health safety limit value, and ensures human health.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a wave-absorbing polyamide composite material and a preparation method thereof. Background technique [0002] The rapid development of electronic communication technology and radar technology has greatly promoted the convenience of human life and the informatization of various fields, but it has also brought many problems in terms of electromagnetic safety. Effective absorption and attenuation of electromagnetic radiation by absorbing materials is one of the effective means to eliminate electromagnetic radiation pollution and protect the normal operation of electronic equipment. With the advancement of technology, people have higher and higher requirements for the performance of absorbing materials, and absorbing materials are gradually developing towards the trend of "thin, light, wide and strong". Although traditional absorbing materials such as ferrite and carbonyl iron have strong a...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L51/06C08L63/00C08L71/02C08K9/04C08K3/04C08K9/02C08K3/22C08K9/12
Inventor 王忠强易庆锋
Owner GUANGDONG ALDEX NEW MATERIAL CO LTD
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