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Heat conducting nylon material based on sulfonated graphene and preparation method thereof

A technology of sulfonated graphene and graphene, applied in the field of modified nylon materials, can solve the problems of limited improvement in thermal conductivity and uneven dispersion, and achieve the effects of low cost, simple preparation process and less addition amount

Active Publication Date: 2015-08-19
抚州鳌系新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still has some disadvantages, such as uneven dispersion in the nylon substrate, limited improvement in thermal conductivity, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Add oleum and chlorosulfonic acid with a mass ratio of 3:4 into a multi-tubular membrane reactor, then add graphene (with a radial dimension of 500nm to 50 μm and a thickness of 1 to 20nm) and mix evenly to make the mixture The graphene content in the reactant reaches 2wt%, and react at 60°C for 10 hours. After the reaction is completed, the mixed reactant is distilled at 165°C, and the residue is washed with water to obtain sulfonated graphene, and then the obtained sulfonated Graphene is dispersed in water to form a sulfonated graphene aqueous solution with a concentration of 5 wt % for subsequent use.

[0018] Add the sulfonated graphene aqueous solution, nylon monomer caprolactam, water, and adipic acid into the autoclave at a ratio of 10:70:20:0.35, slowly raise the temperature to 150°C, and stir at a low speed for 0.5h, then continue to heat up to The reaction temperature is 260°C, and the pressure is maintained at 5 MPa for 2 hours, then vacuumed until ...

Embodiment 2

[0019] Example 2 Add oleum and chlorosulfonic acid with a mass ratio of 1:6 into a multi-tubular membrane reactor, then add graphene (with a radial dimension of 500nm to 50μm and a thickness of 1 to 20nm) and mix evenly to make the mixture The graphene content in the reactant reaches 2wt%, react at 150°C for 1 hour, after the reaction is completed, distill the mixed reactant at 160°C, wash the residue with water to obtain sulfonated graphene, and then sulfonate the obtained Graphene is dispersed in water to form a sulfonated graphene aqueous solution with a concentration of 20 wt%, which is ready for use.

[0020] Add the obtained sulfonated graphene aqueous solution, nylon 66 salt, water, and adipic acid into the autoclave at a ratio of 10:55:35:0.35, slowly raise the temperature to 150°C, and stir at a low speed for 0.5h, then continue to heat up to the reaction The temperature is 285°C, and the pressure is maintained at 2 MPa for 5 hours, then vacuumized until the viscosity...

Embodiment 3

[0021] Example 3 Add oleum and chlorosulfonic acid with a mass ratio of 1:1 into a multi-tubular membrane reactor, then add graphene (with a radial dimension of 500nm to 50μm and a thickness of 1 to 20nm) and mix evenly to make the mixture The graphene content in the reactant reaches 2wt%, react at 100°C for 2 hours, after the reaction is completed, distill the mixed reactant at 160°C, wash the residue with water to obtain sulfonated graphene, and then sulfonate the obtained Graphene is dispersed in water to form a sulfonated graphene aqueous solution with a concentration of 10 wt%, which is set aside.

[0022] Add the obtained sulfonated graphene aqueous solution, nylon 66 salt, and water into the autoclave at a ratio of 10:60:30:0.35, slowly heat up to 150°C, and stir at a low speed for 0.5h, then continue to heat up to the reaction temperature, at 2MPa Keep the pressure for 5 hours, then vacuumize until the viscosity is stable, discharge and granulate to obtain the target p...

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Abstract

The invention discloses a heat conducting nylon material based on sulfonated graphene. The heat conducting nylon material comprises the following raw materials of 95wt percent to 99.9wt percent of nylon-based material and 0.1wt percent to 5wt percent of sulfonated graphene, wherein the radial size of the sulfonated graphene is 500nm to 50mum, the thickness of the sulfonated graphene is 1 to 20nm, and the molar ratio of C (carbon) and S (sulfur) in the sulfonated graphene is (12 to 1) to (6 to 1). The invention also provides a method for preparing the heat conducting nylon material. The heat conducting nylon material has the advantages that the heat conducting coefficient of the heat conducting nylon material along the vertical direction is 0.5 to 10W per (m.k), and the self good mechanical property of the nylon material is maintained and even optimized; the preparation technology is simple, the condition is moderate and controllable, the adding amount of sulfonated graphene is less, and the cost is low; the application prospect is broad in the fields of LED (light emitting diode) lamps, switch outer casings, notebook computer outer casings, mobile phone casings and the like.

Description

technical field [0001] The invention relates to a modified nylon material, in particular to a thermally conductive nylon material based on sulfonated graphene and a preparation method thereof. Background technique [0002] Nylon is a thermoplastic engineering plastic with excellent performance. It has excellent mechanical properties, good electrical properties, wear resistance, oil resistance, solvent resistance, self-lubrication, corrosion resistance and good processing performance. It is widely used in automobiles, electronic appliances , machinery, aerospace and other industrial fields and daily life. However, nylon is a thermal insulator, which limits its application in certain fields, such as the field of thermally conductive materials. In order to improve the thermal conductivity of nylon, a high amount of thermally conductive filler is usually used, such as BN, AlN, Si 3 N 4 Modification of nylon with SiC, etc., but at the same time it will damage and reduce other ...

Claims

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Application Information

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IPC IPC(8): C08G69/14C08G69/26C08K9/02C08K3/04
Inventor 蒋永华郝建东栗建民
Owner 抚州鳌系新材料有限公司
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