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Surface-modified halloysite nanotubes as fillers applied in reinforcing the performance of polytetrafluoroethylene

Published online by Cambridge University Press:  29 January 2019

Zhi-Lin Cheng ,
Xing-Yu Chang ,
Zan Liu  and
Dun-Zhong Qin
Zhi-Lin Cheng*
Affiliation:
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
Xing-Yu Chang
Affiliation:
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
Zan Liu
Affiliation:
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
Dun-Zhong Qin
Affiliation:
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China Jiangsu Sinvochem Co. Ltd, Yangzhou, 225002, China
*
*E-mail: [email protected]
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Abstract

In order to improve the dispersibility of halloysite nanotubes (HNTs) in polytetrafluoroethylene (PTFE), the modification of HNT surfaces was studied with three types of modifiers (polymethyl methacrylate [PMMA], sodium dodecyl sulfate [SDS] and carboxylic acid). The modified HNTs were characterized by Fourier-transform infrared (FTIR) spectrometry, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and contact angle measurements. The HNTs were used to reinforce the mechanical properties of PTFE. The mechanical results indicated that the tensile strength of the modified HNT-filled PTFE nanocomposites (F-HNT/PTFE) improved to an acceptable degree and Young's modulus increased significantly. The tribological results showed that the wear rate of F-HNT/PTFE decreased by 21–82 and 9–40 times compared to pure PTFE and the pristine F-HNT/PTFE, respectively.

Keywords

PTFEHNTssurface modificationmechanical propertiestribological properties
Type
Article
Information
Clay Minerals , Volume 53 , Issue 4 , December 2018 , pp. 643 - 656
Copyright
Copyright © Mineralogical Society of Great Britain and Ireland 2018 

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Footnotes

Associate Editor: Pilar Aranda

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