A preparation method of antistatic nylon 6 composite material and the composite material

A composite material and antistatic technology, applied in the field of functional composite materials, can solve the problems that affect the performance of nylon 6 composite materials, the mechanical properties of composite materials have not been reported, and the electrical conductivity of composite materials is limited. Mechanical properties, avoid water vapor contact, improve the effect of mechanical properties

Active Publication Date: 2017-12-22
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antistatic performance of nylon 6 is usually improved by adding a large amount of conductive filler, but the addition of a large amount of conductive filler will also lead to a decrease in the mechanical properties of the composite material, affecting the performance of the nylon 6 composite material
[0003] Chinese patent CN 101565542A discloses a conductive MC nylon material and its production method. Since the conductive filler is simply mixed in the matrix, the dispersion effect is not good, so that the improvement of the conductivity of the composite material is limited.
Chinese patent CN102260406A reports nylon 6 nano-conductive composite material and its preparation method. Conductive fillers such as graphite, carbon fiber and carbon nanotubes are surface-modified by silane coupling agent to obtain nylon 6 composite material with good electrical conductivity, but the surface The processing period is long, and the mechanical properties of composite materials have not been reported

Method used

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  • A preparation method of antistatic nylon 6 composite material and the composite material
  • A preparation method of antistatic nylon 6 composite material and the composite material
  • A preparation method of antistatic nylon 6 composite material and the composite material

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preparation example Construction

[0025] The preparation method of antistatic nylon 6 composite material of the present invention specifically comprises the steps:

[0026] (1) Heat and dry the conductive filler in a vacuum oven at 120-200°C for 4-8 hours;

[0027] (2) Heat the caprolactam monomer in the reaction vessel to 110-130°C to melt the material, add the initiator after vacuum dehydration for 0.5-1 hour, and continue the vacuum dehydration for 0.5-1 hour; remove the vacuum, add conductive filler, and raise The temperature of the reaction solution is 130-150°C, high-speed stirring, dispersion and emulsification for 0.5-1 hour, and then vacuum dehydration for 0.5-1 hour. The vacuum degree during vacuum dehydration is less than or equal to 10 -2 Pa; High-speed stirring, dispersing and emulsifying uses a high-speed homogenizer with a speed of 500-4000rpm.

[0028] (3) After releasing the vacuum, add the catalyst to disperse for 1-8 minutes, use the vacuum-assisted resin molding method to pump the reactio...

Embodiment 1

[0036] Dry natural graphite in a vacuum oven at 120°C for 8 hours, then add 100 parts by mass of caprolactam monomer into a 1L reactor, heat up to 110°C to melt, add 0.1 part by mass of sodium methoxide after vacuum dehydration for 0.5 hours, and continue vacuum dehydration for 0.5 hours (vacuum less than 10 -2 Pa), then add 1 mass part of natural graphite, use a high-speed homogenizer to disperse and emulsify for 0.5 hours (rotating speed 500rpm) and heat to 140°C, vacuum dehydrate for 1 hour, add 0.3 mass parts of toluene 2,4 diisocyanate after removing the vacuum, After stirring for 8 minutes, quickly use the vacuum-assisted resin transfer molding process to pump the reaction solution into a flat mold that has been preheated to 150°C (vacuum degree 0.08MPa), demould after 0.5 hours, and obtain an antistatic nylon 6 compound after post-processing Material. The typical properties of the composite materials are shown in Table 1.

Embodiment 2

[0038] Dry natural graphite in a vacuum oven at 120°C for 8 hours, then add 100 parts by mass of caprolactam monomer into a 1L reactor, heat up to 110°C to melt, add 0.3 parts by mass of sodium methoxide after vacuum dehydration for 1 hour, and continue vacuum dehydration for 0.5 hours (vacuum degree 10 -2 Pa), then add 10 parts by mass of natural graphite, use a high-speed homogenizer to disperse and emulsify for 1 hour (rotational speed 2000rpm) and heat to 140°C, vacuum dehydrate for 0.5 hours, and add 0.6 parts by mass of tetrahydrofuran modified toluene after removing the vacuum 2,4 Diisocyanate, after stirring for 5 minutes, the reaction solution was pumped and injected into the flat mold preheated to 170°C (vacuum degree 0.03MPa) by vacuum-assisted resin transfer molding process, and demolded after 0.5 hours, and the anti- Electrostatic nylon 6 composite. The typical properties of the composite materials are shown in Table 1.

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Abstract

The invention relates to a preparation method of an antistatic nylon 6 composite material and the composite material. The preparation method directly adopts caprolactam monomer for in-situ polymerization reaction, adds conductive filler, catalyst and initiator in the reaction, and designs the optimal The reaction route and the optimized design of the process parameters have realized the uniform dispersion of conductive filler particles in the reaction solution, significantly improved the degree of anionic polymerization of caprolactam, and made the prepared nylon 6 composite material excellent in conductivity and antistatic properties and mechanical properties; the antistatic nylon 6 composite material prepared by this method has important promotion and application prospects in aerospace, automobile industry, electronic appliances and other fields.

Description

technical field [0001] The invention relates to a preparation method of an antistatic nylon 6 composite material and the composite material, belonging to the field of functional composite materials. Background technique [0002] Nylon 6 is a general-purpose engineering plastic with a wide range of uses. It has excellent mechanical properties, thermal properties, wear resistance and self-lubricating properties. It has been widely used in aerospace, machinery manufacturing, automobile industry, electrical industry and other fields. In particular, anionic polymerized monomer cast nylon has higher molecular weight, crystallinity, and density than ordinary nylon 6, so it has better mechanical strength, stiffness, and wear resistance. It is gradually replacing metals such as copper, aluminum, and steel in many fields. Material. However, since the surface resistance of nylon 6 is generally 10 14 ~10 15 Ω, poor conductivity. When contacting or rubbing with the surface of other s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/20C08K3/04C08K7/24
Inventor 朱世鹏冯志海左小彪杨云华孔磊孙福瑞潘月秀
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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