A study of surface modifications of carbon nanotubes on the properties of polyamide 66/multiwalled carbon nanotube composites

Li Qiu; Yong Chen; Yongzhen  Yang; Lihua Xu; Xuguang Liu

doi:10.1155/2013/252417

A study of surface modifications of carbon nanotubes on the properties of polyamide 66/multiwalled carbon nanotube composites

Li Qiu, Yong Chen, Yongzhen Yang, Lihua Xu, Xuguang Liu

Centre for Engineering Research

Research output: Contribution to journal › Article › peer-review

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Abstract

The effects of surface modification of carbon nanotube on the properties of polyamide 66/multiwalled carbon nanotube composites have been investigated. Polyamide 66 (PA66) and multiwalled carbon nanotubes (MWCNTs) composites were prepared by melt mixing. The surfaces of MWCNTs were modified with acid- and amine-groups. Field emission scanning electron microscopy analyses revealed that amine-MWCNTs(D-MWCNTs) dispersed better in the PA66 matrix than pristine- and acid-MWCNTs. However, an introduction of D-MWCNTs into PA66 matrix induced heterogeneous nucleation and affected the crystal growth process during the crystallization of PA66/MWCNTs composites. Both nano-indentation and friction analyses were carried out in a study of the effect of the introduction of modified MWCNTs on both mechanical and friction properties of the composites. With the introduction of D-MWCNTs, both nano-hardness and elastic modulus of the composites were significantly improved but it was observed that the maximum depth, nano-hardness and elastic modulus of the composites showed no distinct change before and after a friction test. It is evident that PA66/D-MWCNTs composites have the least friction coefficient of the PA66/MWCNTs composites of all the approaches of carbon nanotube surface modification.

Original language	English
Article number	252417
Number of pages	8
Journal	Journal of Nanomaterials
Volume	2013
DOIs	https://doi.org/10.1155/2013/252417
Publication status	Published - 29 Oct 2013

Keywords

polyamide 66
carbon nanotube
surface modification
friction

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10.1155/2013/252417

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Copyright © 2013 Li Qiu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
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title = "A study of surface modifications of carbon nanotubes on the properties of polyamide 66/multiwalled carbon nanotube composites",

abstract = "The effects of surface modification of carbon nanotube on the properties of polyamide 66/multiwalled carbon nanotube composites have been investigated. Polyamide 66 (PA66) and multiwalled carbon nanotubes (MWCNTs) composites were prepared by melt mixing. The surfaces of MWCNTs were modified with acid- and amine-groups. Field emission scanning electron microscopy analyses revealed that amine-MWCNTs(D-MWCNTs) dispersed better in the PA66 matrix than pristine- and acid-MWCNTs. However, an introduction of D-MWCNTs into PA66 matrix induced heterogeneous nucleation and affected the crystal growth process during the crystallization of PA66/MWCNTs composites. Both nano-indentation and friction analyses were carried out in a study of the effect of the introduction of modified MWCNTs on both mechanical and friction properties of the composites. With the introduction of D-MWCNTs, both nano-hardness and elastic modulus of the composites were significantly improved but it was observed that the maximum depth, nano-hardness and elastic modulus of the composites showed no distinct change before and after a friction test. It is evident that PA66/D-MWCNTs composites have the least friction coefficient of the PA66/MWCNTs composites of all the approaches of carbon nanotube surface modification.",

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AU - Qiu, Li

AU - Chen, Yong

AU - Yang, Yongzhen

AU - Xu, Lihua

AU - Liu, Xuguang

N1 - Copyright © 2013 Li Qiu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

PY - 2013/10/29

Y1 - 2013/10/29

N2 - The effects of surface modification of carbon nanotube on the properties of polyamide 66/multiwalled carbon nanotube composites have been investigated. Polyamide 66 (PA66) and multiwalled carbon nanotubes (MWCNTs) composites were prepared by melt mixing. The surfaces of MWCNTs were modified with acid- and amine-groups. Field emission scanning electron microscopy analyses revealed that amine-MWCNTs(D-MWCNTs) dispersed better in the PA66 matrix than pristine- and acid-MWCNTs. However, an introduction of D-MWCNTs into PA66 matrix induced heterogeneous nucleation and affected the crystal growth process during the crystallization of PA66/MWCNTs composites. Both nano-indentation and friction analyses were carried out in a study of the effect of the introduction of modified MWCNTs on both mechanical and friction properties of the composites. With the introduction of D-MWCNTs, both nano-hardness and elastic modulus of the composites were significantly improved but it was observed that the maximum depth, nano-hardness and elastic modulus of the composites showed no distinct change before and after a friction test. It is evident that PA66/D-MWCNTs composites have the least friction coefficient of the PA66/MWCNTs composites of all the approaches of carbon nanotube surface modification.

AB - The effects of surface modification of carbon nanotube on the properties of polyamide 66/multiwalled carbon nanotube composites have been investigated. Polyamide 66 (PA66) and multiwalled carbon nanotubes (MWCNTs) composites were prepared by melt mixing. The surfaces of MWCNTs were modified with acid- and amine-groups. Field emission scanning electron microscopy analyses revealed that amine-MWCNTs(D-MWCNTs) dispersed better in the PA66 matrix than pristine- and acid-MWCNTs. However, an introduction of D-MWCNTs into PA66 matrix induced heterogeneous nucleation and affected the crystal growth process during the crystallization of PA66/MWCNTs composites. Both nano-indentation and friction analyses were carried out in a study of the effect of the introduction of modified MWCNTs on both mechanical and friction properties of the composites. With the introduction of D-MWCNTs, both nano-hardness and elastic modulus of the composites were significantly improved but it was observed that the maximum depth, nano-hardness and elastic modulus of the composites showed no distinct change before and after a friction test. It is evident that PA66/D-MWCNTs composites have the least friction coefficient of the PA66/MWCNTs composites of all the approaches of carbon nanotube surface modification.

KW - polyamide 66

KW - carbon nanotube

KW - surface modification

KW - friction

U2 - 10.1155/2013/252417

DO - 10.1155/2013/252417

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SN - 1687-4110

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JO - Journal of Nanomaterials

JF - Journal of Nanomaterials

M1 - 252417

ER -

A study of surface modifications of carbon nanotubes on the properties of polyamide 66/multiwalled carbon nanotube composites

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