Purification Of The Multiwalled Carbon Nanotubes (Mwcnts) And The Application Of The 3r (Reduce, Reuse And Recycle) Concept On The Chitosan/Mwcnts Nanocomposites

The as-prepared multiwalled carbon nanotubes (MWCNTs) consist of high impurities of amorphous carbon, metal catalysts and catalyst support that impeded the MWCNTs applications. The combination of the wet etchant (0.2 M sodium citrate, 0.2 M NTANa3 and 0.1 M NaOH, in the volumetric ratio of 2:2:1) wa...

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Main Author:	Cheng, Yoke Kooi
Format:	Thesis
Language:	English
Published:	2012
Subjects:	TP1-1185 Chemical technology
Online Access:	http://eprints.usm.my/43579/1/Cheng%20Yoke%20Kooi24.pdf
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id	my-usm-ep.43579
record_format	uketd_dc
spelling	my-usm-ep.435792019-04-12T05:26:19Z Purification Of The Multiwalled Carbon Nanotubes (Mwcnts) And The Application Of The 3r (Reduce, Reuse And Recycle) Concept On The Chitosan/Mwcnts Nanocomposites 2012-12 Cheng, Yoke Kooi TP1-1185 Chemical technology The as-prepared multiwalled carbon nanotubes (MWCNTs) consist of high impurities of amorphous carbon, metal catalysts and catalyst support that impeded the MWCNTs applications. The combination of the wet etchant (0.2 M sodium citrate, 0.2 M NTANa3 and 0.1 M NaOH, in the volumetric ratio of 2:2:1) was used to remove the amount of impurities of the raw MWCNTs. Treatment temperature was the key factor for the effectiveness of the wet etchant on the removal of residue but it was not affected by the reaction time. Alumina, the major impurity was reduced from 24.0 wt. % to 9.3 wt. % whereas cobalt and molybdenum were reduced from 9.6 wt. % to 4.4 wt. % and 2.3 wt. % to 0.6 wt. %, respectively at temperature of 138oC in wet etchant treatment. With the aid of the piranha solution treatment, further reduced the impurities; alumina to 6.7 wt. %, cobalt to 0.7 wt. % and molybdenum to 0.1 wt. %. Although MWCNTs able to act as fiber to enhance mechanical properties of the polymer but they are harmful to the living. Hence, The 3R conceptual idea is used to overcome the limitation of the MWCNTs. The chitosan/MWCNTs nanocomposites were prepared by solution processing method. 2012-12 Thesis http://eprints.usm.my/43579/ http://eprints.usm.my/43579/1/Cheng%20Yoke%20Kooi24.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TP1-1185 Chemical technology
spellingShingle	TP1-1185 Chemical technology Cheng, Yoke Kooi Purification Of The Multiwalled Carbon Nanotubes (Mwcnts) And The Application Of The 3r (Reduce, Reuse And Recycle) Concept On The Chitosan/Mwcnts Nanocomposites
description	The as-prepared multiwalled carbon nanotubes (MWCNTs) consist of high impurities of amorphous carbon, metal catalysts and catalyst support that impeded the MWCNTs applications. The combination of the wet etchant (0.2 M sodium citrate, 0.2 M NTANa3 and 0.1 M NaOH, in the volumetric ratio of 2:2:1) was used to remove the amount of impurities of the raw MWCNTs. Treatment temperature was the key factor for the effectiveness of the wet etchant on the removal of residue but it was not affected by the reaction time. Alumina, the major impurity was reduced from 24.0 wt. % to 9.3 wt. % whereas cobalt and molybdenum were reduced from 9.6 wt. % to 4.4 wt. % and 2.3 wt. % to 0.6 wt. %, respectively at temperature of 138oC in wet etchant treatment. With the aid of the piranha solution treatment, further reduced the impurities; alumina to 6.7 wt. %, cobalt to 0.7 wt. % and molybdenum to 0.1 wt. %. Although MWCNTs able to act as fiber to enhance mechanical properties of the polymer but they are harmful to the living. Hence, The 3R conceptual idea is used to overcome the limitation of the MWCNTs. The chitosan/MWCNTs nanocomposites were prepared by solution processing method.
format	Thesis
qualification_level	Master's degree
author	Cheng, Yoke Kooi
author_facet	Cheng, Yoke Kooi
author_sort	Cheng, Yoke Kooi
title	Purification Of The Multiwalled Carbon Nanotubes (Mwcnts) And The Application Of The 3r (Reduce, Reuse And Recycle) Concept On The Chitosan/Mwcnts Nanocomposites
title_short	Purification Of The Multiwalled Carbon Nanotubes (Mwcnts) And The Application Of The 3r (Reduce, Reuse And Recycle) Concept On The Chitosan/Mwcnts Nanocomposites
title_full	Purification Of The Multiwalled Carbon Nanotubes (Mwcnts) And The Application Of The 3r (Reduce, Reuse And Recycle) Concept On The Chitosan/Mwcnts Nanocomposites
title_fullStr	Purification Of The Multiwalled Carbon Nanotubes (Mwcnts) And The Application Of The 3r (Reduce, Reuse And Recycle) Concept On The Chitosan/Mwcnts Nanocomposites
title_full_unstemmed	Purification Of The Multiwalled Carbon Nanotubes (Mwcnts) And The Application Of The 3r (Reduce, Reuse And Recycle) Concept On The Chitosan/Mwcnts Nanocomposites
title_sort	purification of the multiwalled carbon nanotubes (mwcnts) and the application of the 3r (reduce, reuse and recycle) concept on the chitosan/mwcnts nanocomposites
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Kimia
publishDate	2012
url	http://eprints.usm.my/43579/1/Cheng%20Yoke%20Kooi24.pdf
_version_	1747821240802869248

Purification Of The Multiwalled Carbon Nanotubes (Mwcnts) And The Application Of The 3r (Reduce, Reuse And Recycle) Concept On The Chitosan/Mwcnts Nanocomposites

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