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Nylon material having ultra-strong liquidity and preparation method thereof

A fluidity, nylon technology, applied in the field of nylon materials, can solve the problems of uneven and stable physical and chemical properties of composite materials, inability to scale production, poor dispersion, etc. The effect of strong liquidity

Active Publication Date: 2015-04-08
SUZHOU GRAPHENE NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional nylon materials are already difficult to meet the application requirements of some new fields. For this reason, researchers have proposed the use of nanomaterials, such as carbon nanotubes, graphene, etc., to modify traditional nylon to improve its performance.
For example, patents such as CN101928457A, CN102352035A, and CN101760011A all describe the preparation technology of nylon-graphene composite materials. The problem of poor dispersion caused by graphene agglomeration leads to inhomogeneous and stable physical and chemical properties of the obtained composite material, making it impossible to carry out large-scale production. In addition, these technologies usually require more complicated operations and equipment to realize, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: get caprolactam as reaction monomer, and total 8.575 kilograms (mass percentage 84.75:1) of this reaction monomer and end-capping agent lauric acid are added to reactor, then add sulfonated graphene containing 2.45% (radial dimension About 20-100 μm, thickness about 1-20nm, can be obtained through commercial channels or refer to CN103539105A, CN103359728A, Nano Letters, 2008, 8(6): 1679-1682 and other documents) 3.5 kg of aqueous solution, slowly heated to 100 ° C , stirred at a speed of 25 rpm for 0.5 hours, continued to heat up to 240°C, kept the pressure at 3MPa for 3 hours, then evacuated until the viscosity was stable, discharged and granulated to obtain the final product.

Embodiment 2

[0022] Embodiment 2: get nylon 66 salt as reaction monomer, and total 7 kilograms (mass percentage 84.75:1) of reaction monomer and end-capping agent adipic acid are added to reactor, then add 1% sulfonated graphene aqueous solution ( Same as Example 1) 2.8 kg, slowly warming up to 150°C, stirring at a speed of 25 rpm for 0.5 hour, continuing to heat up to reaction temperature of 280°C, keeping pressure at 2.5MPa for 2 hours, then evacuating until the viscosity is stable, Discharge and granulate to obtain the final product.

[0023] Observing the multi-batch products obtained in embodiment 1-2 and comparative example 1-2 respectively with scanning electron microscope, it can be seen that in the products obtained in embodiment 1-2, graphene is all uniformly dispersed in the nylon matrix, while In the product of Comparative Example 2, graphene generally has obvious agglomeration phenomenon in the nylon matrix.

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Abstract

The invention discloses a nylon material having ultra-strong liquidity and a preparation method thereof. As one of optimal embodiments, the preparation method comprises the steps of mixing caprolactam, diamine or diacid and other nylon precursors with an end-capping reagent, then adding a mixture into a sulfonating graphene solution, slow rising the temperature to be 100-150 DEG C, stirring the solution for more than 0.5h at low speed, continuing to rise the temperature to be reaction temperature, keeping 2-5MPa pressure for 2 to 5 hours, performing vacuum pump till viscosity stabilization and performing discharging and pelleting to obtain a target product. The preparation method has the advantages of being simple in process, low in cost, high in controllability and easy to implement in a large-scale mode, and the obtained product has good physical and chemical performance, especially has excellent tensile strength, bending strength and impact resisting strength, is high in melt index and has ultra-strong liquidity, can be widely used as a formed thin-wall product, a nylon product large in molecular weight and difficult to process and a nylon product difficult to process after being compounded with other materials.

Description

technical field [0001] The invention relates to a nylon material, in particular to a nylon material with super fluidity and a preparation method thereof. Background technique [0002] Nylon (Nylon) is a general term for thermoplastic resins containing repeating amide groups—[NHCO]—on the main chain of the molecule. Because of its unique properties, it is currently widely used in various fields. However, traditional nylon materials are already difficult to meet the application requirements of some new fields. For this reason, researchers have proposed a plan to use nanomaterials, such as carbon nanotubes and graphene, to modify traditional nylon to improve its performance. For example, patents such as CN101928457A, CN102352035A, and CN101760011A all describe the preparation technology of nylon-graphene composite materials. The problem of poor dispersion caused by graphene agglomeration leads to inhomogeneous and stable physical and chemical properties of the obtained composi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08K9/00C08K3/04C08G69/16C08G69/28
CPCC08G69/16C08G69/28C08K3/04C08K9/00C08K2201/005
Inventor 蒋永华郝建东栗建民
Owner SUZHOU GRAPHENE NEW MATERIAL TECH
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