Graphene in-situ modified nylon 6 composite and preparation method and application thereof

A composite material and polylactam technology, which is applied in the field of graphene in-situ modified polylactam composite materials, can solve the problems of unstable material performance, poor interface adhesion, and poor dispersion of modifier graphene , to achieve the effects of reduced friction coefficient, improved anti-wear performance, and simple and easy preparation method

Active Publication Date: 2016-02-03
HANGZHOU NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of poor dispersibility, poor interfacial adhesion, and unstable material properties of the current modifier graphene, the present invention provides a graphene in-situ modified polylactam composite material and a preparation method thereof, which have good dispersibility and phase Good capacitance and stable performance

Method used

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  • Graphene in-situ modified nylon 6 composite and preparation method and application thereof

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Experimental program
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Embodiment 1

[0031] Graphite is pretreated by the Hummer method, that is, 1g graphite, 1gNaNO 3 , 3ml of H with a mass concentration of 98% 2 SO 4 were placed in three-necked flasks and stirred for 5min, then slowly added 4gKMnO 4 , reacted at room temperature for 10min, slowly added 50ml deionized water and 10gH 2 o 2 , at a temperature of 70°C, stirred and refluxed for 10 hours, then filtered with a microporous membrane while hot, washed 3 times with 5% HCl, and then repeatedly washed with distilled water until the filtrate was neutral, and then placed in Dry in a vacuum oven at 40°C for 24 hours to obtain graphene oxide. Disperse 1 g of graphene oxide in anhydrous DMF, ultrasonically disperse for about 1 h, add 1 g of isocyanate, heat and stir, react for 6 h, remove the product, and extract with anhydrous DMF for 6 h to obtain modified graphene oxide. Disperse 1g of modified graphene oxide in anhydrous DMF, add 1g of caprolactam, stir and heat at 130°C for 3h, then extract the prod...

Embodiment 2

[0033] Graphite is pretreated by the Hummer method, that is, 1g graphite, 2gNaNO 3 , 10ml mass concentration of 97% H 2 SO 4 were placed in three-necked flasks and stirred for 10min, then slowly added 6gKMnO 4 , reacted at room temperature for 15min, slowly added 100ml deionized water and 15gH 2 o 2, at a temperature of 85°C, stirred and refluxed for 8 hours, then filtered with a microporous membrane while hot, washed 4 times with 5% HCl, and then repeatedly washed with distilled water until the filtrate was neutral, and then placed in Dry in a vacuum oven at 50°C for 18 hours to obtain graphene oxide. Disperse 1 g of graphene oxide in anhydrous DMF, ultrasonically disperse for about 2 hours, add 2 g of isocyanate to heat and stir, react for 4 hours, remove the product, and extract with anhydrous DMF for 9 hours to obtain modified graphene oxide. Disperse 1 g of modified graphene oxide in anhydrous DMF, add 2 g of decanolactam, stir and heat at 120°C for 4 hours, then ext...

Embodiment 3

[0035] Graphite is pretreated by the Hummer method, that is, 1g graphite, 4gNaNO 3 , 6ml mass concentration of 96% H 2 SO 4 were placed in three-necked flasks and stirred for 20min, then slowly added 8gKMnO 4 , react at room temperature for 30min, slowly add 200ml deionized water and 30gH 2 o 2 , at a temperature of 110°C, stirred and refluxed for 6 hours, then filtered through a microporous membrane while hot, washed 5 times with 5% HCl, and then repeatedly washed with distilled water until the filtrate was neutral, and then placed in Dry in a vacuum drying oven at 70°C for 12 hours to obtain graphene oxide. Disperse 1 g of graphene oxide in anhydrous DMF, ultrasonically disperse for about 3 hours, add 3 g of isocyanate, heat and stir, react for 3 hours, remove the product, and extract with anhydrous DMF for 12 hours , to obtain modified graphene oxide. Disperse 1 g of modified graphene oxide in anhydrous DMF, add 3 g of laurolactam, stir and heat to 100 ° C for 6 h, the...

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Abstract

The invention relates to the field of polymer materials, aims to solve the problems that a conventional modifier is poor in graphene dispersity and interfacial adhesional force, unstable in material property and the like, and provides a graphene in-situ modified nylon 6 composite and a preparation method thereof. The graphene in-situ modified nylon 6 composite has the tensile strength of 60-100 MPa, the impact strength of 90-170 J / m, and the volume abrasion rate of 1.0-5.0 (x10<-5>mm<3>N<-1>m<-1>). The graphene in-situ modified nylon 6 composite has the characteristics of being excellent in dispersity and compatibility and stable in performance, can be applied to the field of selective laser sintering, and ensures that the dimensional stability, the abrasion resistance and the ductility of a workpiece are remarkably improved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a graphene in-situ modified polylactam composite material, a preparation method and an application thereof. Background technique [0002] Graphene is a two-dimensional crystal composed of closely packed carbon atoms, and is the basic unit of carbon allotropes including fullerenes, carbon nanotubes, and graphite. Single-layer graphene is only one carbon atom thick, about 0.335nm. It is the thinnest material known so far. It has many characteristics that carbon materials do not have: super strong mechanical strength, high thermal conductivity, and high light transmission. High efficiency, high specific surface area and unique electrical properties have attracted widespread attention from scholars at home and abroad. Compared with ordinary graphite, graphene microsheets have a nanometer thickness, and are easy to uniformly compound with other materials such as polymer materials and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/14C08G69/16C08K9/02C08K9/04C08K3/04
Inventor 郝超伟来国桥马清芳朱晓清蒋剑雄罗蒙贤
Owner HANGZHOU NORMAL UNIVERSITY
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