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Method for detecting carbon material surface activity based on AFM tip force curve

A technology of surface activity and carbon materials, applied in measuring devices, scanning probe technology, scanning probe microscopy, etc., can solve the problem of affecting the reinforcement effect of carbon black and the surface activity of carbon black affecting the interaction between carbon black and rubber Degree and other issues, to achieve the effect of strong theoretical significance and practical value

Inactive Publication Date: 2017-01-11
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology

However, the surface activity of carbon black greatly affects the degree of interaction between carbon black and rubber, which in turn affects the reinforcing effect of carbon black.

Method used

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  • Method for detecting carbon material surface activity based on AFM tip force curve
  • Method for detecting carbon material surface activity based on AFM tip force curve
  • Method for detecting carbon material surface activity based on AFM tip force curve

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with specific embodiments.

[0032] One, a kind of method based on AFM tip force curve detection carbon material surface activity, comprises the following steps:

[0033] S1. Use a specific polymer to modify the AFM tip:

[0034] S11: First place the AFM probe (see the SEM picture of its surface figure 1 ) immersed in 10wt% hydrogen peroxide solution for 10 minutes, then take it out, and dry it naturally in the atmosphere to constant weight;

[0035] S12: Dissolve the specific polymer substance in xylene to obtain a solution of 0.5wt%-1wt%; then add aminopropyltriethoxysilane to the solution to make the aminopropyltriethoxysilane in the solution The concentration of base silane reaches 0.1wt%, and it is heated in a water bath at 70°C and magnetically stirred until it is completely dissolved, that is, a specific polymer solution is obtained;

[0036] S13: Keep the probe and the specific pol...

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Abstract

The invention discloses a method for detecting carbon material surface activity based on an AFM tip force curve. The method comprises the steps that S1 a specific macromolecular modified AFM tip is adopted; S2 a detection sample is prepared; S3 a force curve is measured; and S4 the values of absorption force and desorption force are obtained according to the force curve obtained in the step S3. The specific macromolecular modified AFM tip is utilized so that quantitative measurement of surface absorption and desorption force of carbon black, graphene, nano-diamond, crystalline flake graphite and other carbon materials can be realized, and thus the foundation is laid for establishing an evaluation system for the reinforcing property of the carbon materials and macromolecular materials.

Description

technical field [0001] The invention belongs to the field of detection of carbon material surface activity, and in particular relates to a method for detecting the surface activity of carbon material based on an AFM needle tip force curve. Background technique [0002] Carbon black is a traditional filler for reinforcing rubber. The particle size, structure and activity of the filler are the three major factors for reinforcing rubber. The particle size and structure have a very clear evaluation system. In the national standards related to carbon black, the particle size and structure of carbon black are characterized by specific surface area, CTAB adsorption value and oil absorption value, so as to evaluate its reinforcing performance in rubber, but there is no such thing as the activity of carbon black. evaluation standard. However, the surface activity of carbon black greatly affects the degree of interaction between carbon black and rubber, and then affects the reinforci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01Q60/26G01Q60/38G01Q30/20
CPCG01Q60/26G01Q30/20G01Q60/38
Inventor 陈建罗少伶聂松代祖洋
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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