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Blending processing method of graphene filled system based on series explosion effect

A filling system and processing method technology, applied in the field of polymer material molding and processing, can solve the problems of lack of long-term continuity, easy to destroy graphene sheet structure, difficult to process graphene filling system, etc., and achieve enhanced peeling and dispersion effect. , Wide range of viscosity, the effect of maintaining integrity

Active Publication Date: 2019-08-20
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The entire melt mixing process is carried out in an internal mixer, which has a strong shearing effect, which is easy to destroy the separated graphene sheet structure, and makes the entire polymer composite preparation process a batch process, which does not have a long-term continuous process. Sex, and the output of a production cycle is determined by the volume of the internal mixer
[0006] Aiming at the shortcomings that the traditional melt blending processing method cannot disperse graphene well, easily destroys the graphene sheet structure, and is difficult to process graphene filling system, a high-efficiency, environmental-friendly, plasticizing The graphene filling system blending processing method with the advantages of good transport effect and high degree of graphene dispersion is of great significance to the processing and molding of polymer materials

Method used

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  • Blending processing method of graphene filled system based on series explosion effect
  • Blending processing method of graphene filled system based on series explosion effect
  • Blending processing method of graphene filled system based on series explosion effect

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Graphene filling system, by mass percent, comprises the following components: 94.5wt% (mass fraction) high-density polyethylene (density=0.95g / cm 3 , melt flow rate: 24g / 10min), 5wt% graphene microflakes (thickness 120nm, average sheet diameter 6μm), 0.5wt% (mass fraction) antioxidant 1010.

[0036] A method for blending and processing graphene-filled systems based on series explosion effects, comprising the following steps:

[0037] S1. Add the graphene filling system through the feeder figure 1 The volumetric pulsation plasticization delivery device is shown. In the direction of material conveying, the pitch of the feeding section gradually decreases, the pitch ratio of the head to the tail is 3.5, and the graphene filling system completes the compaction process in the feeding section.

[0038]S2. The screw pitch of the melting and plasticizing section remains unchanged, which is smaller than the pitch at the end of the feeding section. In the melting and plasticiz...

Embodiment 2

[0043] Graphene filling system, by mass percent, comprises the following components: 90wt% (mass fraction) polypropylene (density=0.9g / cm 3 , melt flow rate: 24g / 10min), 10wt% graphene microflakes (thickness 100nm, average sheet diameter 8μm), critical medium is supercritical CO 2 .

[0044] A method for blending and processing graphene-filled systems based on series explosion effects, comprising the following steps:

[0045] S1. Add the graphene filling system through the feeder figure 1 Shown is the volumetric pulsation in the plastified delivery system. In the material conveying direction, the pitch of the feed section decreases gradually, and the pitch ratio of the head to the tail is in the range of 3.0-6.0. The graphene filling system completes the compaction process in the feed section.

[0046] S2. The pitch of the melting and plasticizing section remains unchanged, which is less than or equal to the pitch at the end of the feeding section. In the melting and plast...

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Abstract

The invention relates to a series explosion effect based graphene filling system blending processing method which is characterized in that a graphene filling system is added in a volume fluctuation plasticizing and conveying device to enable the volume of the graphene filling system to be in alternate periodical change in an axial direction and a radial direction, and periodical compression and release are performed to generate the series explosion effect, so that graphene is stripped and dispersed, and the free volume of a polymer matrix is added, thereby intercalating the graphene into the free volume of the polymer matrix; and particularly, a critical medium can be introduced into the graphene filling system, and the series explosion effect is strengthened. In the method provided by theinvention, by utilizing the physical acting force generated by compression and release of the volume of the graphene filling system, the free volume of the polymer matrix is increased, the graphene is stripped and dispersed, and the method has the advantages of environmental protection and the like. The method realizes continuous process combining stripping and dispersion of the graphene with blending processing, has the advantages of simpleness, high efficiency and the like and can be applied to large-scale industrial production of a graphene composite product.

Description

technical field [0001] The invention relates to the technical field of polymer material molding and processing, in particular to a graphene filling system blending processing method based on series explosion effects. Background technique [0002] In recent years, nanocomposites prepared by blending graphene and polymer materials have shown excellent electrical, thermal, and mechanical properties, and have broad application prospects. However, since the thickness of the graphene nanosheets is only one carbon atom diameter, the sheets are easily stacked by Van der Waals force, which leads to the graphene sheets in the polymer nanocomposite are prone to agglomeration. Thereby weakening and limiting the effect of graphene. Especially for non-polar polymer matrix, such as polypropylene, polyethylene, etc., due to the weak interaction between the carbon conjugated double bond contained in graphene and such materials, it is easier to cause graphene sheets to be in the matrix. A r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B7/42
Inventor 瞿金平
Owner SOUTH CHINA UNIV OF TECH
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