The use of fluorinated CNTs as epoxy resin modifiers

Alexander N Blohin,Artem K Sukhorukov,Tatiana P Dyachkova,S Bratan,S Roshchupkin,S Gorbatyuk,S Leonov

doi:10.1051/matecconf/201712902041

Abstract

The effect of fluorination conditions for carbon nanotubes (CNTs) on their chemical composition and structure was studied by IR-Fourier, X-ray photoelectron and Raman spectroscopy, X-ray diffraction analysis, thermogravimetry and electron microscopy. The CNT treatment using fluorine does not cause noticeable damages to side walls and a pronounced increase in the degree of defectiveness, but contributes to an increase of up to 2.26 times in the specific surface area. From the viewpoint of a reinforcing effect, when introduced into a polymer matrix based on a Bisphenol-F-type epoxy resin, the fluorinated CNTs are noticeably more effective than the initial ones. At the fluorinated CNT concentration of 0.1 wt.% in the composite, the tensile strength, Young's modulus at stretching, flexural strength and Young's modulus at bending increase by 50, 74, 60 and 66 %, respectively, whereas the thermal stability and electrical conductivity of the composite practically do not change.

Highlights

Carbon nanomaterials, especially single-walled and multi-walled carbon nanotubes (CNTs), have been widely used as fillers to improve the properties of polymer composites [1]
The purpose of the present work was to study the effect of fluorination conditions on the chemical composition and structural characteristics of CNTs and the strength characteristics of composites based on a Bisphenol-F-type resin modified with initial and fluorinated CNTs
The greatest effect is achieved with 0.1 wt.% of the fluorinated CNTs in the composite: the tensile strength increases by 50 %, the Young's modulus at stretching increases by 74%, the flexural strength increases by 60%, and the Young's modulus at bending increases by 66%

Summary

Introduction

Carbon nanomaterials, especially single-walled and multi-walled carbon nanotubes (CNTs), have been widely used as fillers to improve the properties of polymer composites [1]. One of the most promising ways of functionalizing the CNT surface is direct fluorination using treatment with fluorine gas at elevated temperature [13,14,15,16,17]. In this regard, the purpose of the present work was to study the effect of fluorination conditions on the chemical composition and structural characteristics of CNTs and the strength characteristics of composites based on a Bisphenol-F-type resin modified with initial and fluorinated CNTs. bonds formed with increasing the duration and temperature of the CNT treatment using fluorine. At a higher temperature, more "defective" oxygen-containing groups are formed on the CNT surface

Experimental

GOh m m

Findings

Conclusion