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Application of AAO membrane to morphological representation of graphene/polymer composite material

A composite material and morphology characterization technology, applied in polyester coatings, polyamide coatings, using wave/particle radiation, etc., can solve the problems of difficult graphene observation, interference with graphene resolution, etc., to avoid repeated centrifugation and improve resolution. degree and accuracy, the effect of avoiding interference

Active Publication Date: 2018-09-21
HANGZHOU GAOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for graphene / polymer composites, the difficult-to-remove polymer spontaneously forms a film after deposition on the substrate, which interferes with the resolution of graphene in SEM observation.
Especially when a covalent graft is formed between graphene and polymer, the polymer itself covers the surface of graphene, and the edge of graphene will be covered on a flat substrate, making it difficult to observe graphene

Method used

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  • Application of AAO membrane to morphological representation of graphene/polymer composite material
  • Application of AAO membrane to morphological representation of graphene/polymer composite material
  • Application of AAO membrane to morphological representation of graphene/polymer composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 1g of graphene / nylon 6 composite slices, dissolve in 30g of 64% formic acid, shake and dissolve at 60°C, centrifuge at 15,000 rpm for 10 minutes, pour off the supernatant, add 20g of 64% formic acid to redisperse, and deposit on the aperture The surface of the AAO film with a thickness of 200nm was observed under SEM after vacuum drying.

[0025] Through the above steps, the graphene morphology in the graphene / nylon 6 composite slice is obtained, such as figure 1 shown. It can be seen that graphene sheets are suspended above the porous AAO substrate with clearly visible edges. Surface particulate matter may be in situ grafted polymer molecules.

Embodiment 2

[0027] Take 1g of multilayer graphene / nylon 6 composite slices, dissolve them in 30g of 64% formic acid, shake and dissolve at 60°C, centrifuge at 15,000 rpm for 10 minutes, pour off the supernatant, add 20g of 64% formic acid to redisperse, and deposit On the surface of AAO membrane with a pore size of 200nm, after vacuum drying, observe under SEM.

[0028] Through the above steps, the graphene morphology in the multilayer graphene / nylon 6 composite slice is obtained, such as figure 2 shown. It can be seen that compared to figure 1 The overall material is thicker, and the layered structure can be seen at the edge, which is multi-layer graphene. There are no rough particles on the surface and it is smoother.

Embodiment 3

[0030] Take 0.8g of graphene / PET composite slices, dissolve in 25g of phenol / tetrachloroethane (1:1) solution, shake and dissolve at 40°C, centrifuge at 18000 rpm for 20 minutes, pour off the supernatant , Add 25g of phenol / tetrachloroethane (1:1) solution to redisperse, deposit on the surface of AAO membrane with a pore size of 200nm, and observe under SEM after vacuum drying.

[0031] Through the above steps, the graphene morphology in the graphene / PET composite slice is obtained, such as image 3 shown. It can be seen that the overall shape and figure 1 Closer, the overall shape is clearly visible.

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Abstract

The invention discloses the application of an AAO (anodic aluminum oxide) membrane to morphological representation of a graphene / polymer composite material. The application comprises the following steps: dissolving a composite material into a good solvent of polymers, removing most of the polymers through one-step centrifugation, dropping on the surface of the AAO membrane, and observing under a scanning electron microscope (SEM) to obtain the morphological and size information of the graphene in the composite material. The method is simple and practicable; and compared with the traditional method, the method has the following advantages: the polymers which are not removed permeate into micropores of the AAO and are not remained on a substrate, influence on observation of the graphene is avoided, high resolution ratio and high contrast are achieved, and the acquired size information is more accurate.

Description

technical field [0001] The invention belongs to the field of composite material characterization, in particular to the application of AAO film in graphene / polymer composite material morphology characterization. Background technique [0002] Graphene is a two-dimensional sheet material composed of honeycomb carbon atoms, which has attracted worldwide attention since its inception. Graphene has fascinating mechanical properties (strength up to 130GPa, modulus up to 1TPa), electrical properties (electron mobility up to 200000cm 2 / (Vs)), thermal properties (4800 ~ 5300W / (mk)), so it has broad application prospects in the field of high-performance composite materials. The introduction of graphene can not only effectively improve the mechanical, electrical, and thermal properties of polymers, but also endow them with properties such as gas barrier, electromagnetic shielding, and bactericidal and antibacterial properties that traditional materials do not have. Compared with trad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D177/02C09D167/02C09D133/20C09D7/61G01B15/04
CPCC09D133/20C09D167/02C09D177/02C08K3/042C09D7/61G01B15/04
Inventor 高超陈琛韩燚
Owner HANGZHOU GAOXI TECH CO LTD
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