Polyethylene oxide-mcm-41 and polyaniline-mcm-41 nanocomposites: physicochemical and conducting properties
One of the exciting developments in material science today is the design and synthesis of polymer nanocomposites (PNC) containing electrically-conductive polymer and mesoporous MCM-41 that possess novel properties not exhibited by the individual organic and inorganic materials. The physicochemical a...
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| Format: | Thesis |
| Language: | English |
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2005
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| Online Access: | http://eprints.utm.my/3984/ http://eprints.utm.my/3984/1/NorizahAbdulRahmanMFS2005.pdf |
| _version_ | 1848890690256240640 |
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| author | Abdul Rahman, Norizah |
| author_facet | Abdul Rahman, Norizah |
| author_sort | Abdul Rahman, Norizah |
| building | UTeM Institutional Repository |
| collection | Online Access |
| description | One of the exciting developments in material science today is the design and synthesis of polymer nanocomposites (PNC) containing electrically-conductive polymer and mesoporous MCM-41 that possess novel properties not exhibited by the individual organic and inorganic materials. The physicochemical and conducting properties of two types of PNC namely, PEO/Li-MCM-41 and PANI/MCM-41 prepared by melt and solution intercalation and in situ polymerisation methods have been investigated in this thesis. The aim was to obtain a more detailed understanding of how the combination of polymers with the mesoporous MCM-41 is related to the conducting properties of the PNC. Before PEO and PANI are combined with MCM-41, several modifications of MCM-41 have been done including ion exchange of MCM-41 with lithium chloride, silylation of MCM- 41 with trimethylchlorosilane (TMCS) and functionalization of MCM-41 with sulfonic acid. The PNC obtained was characterized by X-ray diffraction (XRD), infrared (IR) spectroscopy, thermogravimetric analysis and chemical analysis, followed by 27Al, 7Li and 13C/CP MAS NMR spectroscopy. It is confirmed that the structure of MCM-41 remains intact after combining with the polymers. The results from the conductivity study have proven that the PNC possesses electrical properties. It is revealed that the conductivity of PANI/MCM-41 is very much higher than PEO/Li-MCM-41 since PANI is a conducting polymer whereas PEO is a polymer electrolyte. The combination of PEO and MCM-41 was expected to increase the conductivity of PEO/Li-MCM-41 by intercalation of PEO inside the pores of MCM-41. However, it is demonstrated that unmodified Li-MCM-41 exhibits conductivity in the same order of magnitude as the PEO/Li-MCM-41. The NMR results suggested that the interfacial interactions occurring between the PEO and Li-Al-MCM-41 is insufficient to improve the conductivity of the PEO/Li-MCM-41 nanocomposite. On the other hand, PANI/MCM-41 nanocomposite shows an increase in thermal stability of conductivity compared to PANI, although its conductivity was lower in the presence of MCM-41. |
| first_indexed | 2025-11-15T20:46:05Z |
| format | Thesis |
| id | utm-3984 |
| institution | Universiti Teknologi Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T20:46:05Z |
| publishDate | 2005 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utm-39842018-01-15T00:35:34Z http://eprints.utm.my/3984/ Polyethylene oxide-mcm-41 and polyaniline-mcm-41 nanocomposites: physicochemical and conducting properties Abdul Rahman, Norizah QD Chemistry One of the exciting developments in material science today is the design and synthesis of polymer nanocomposites (PNC) containing electrically-conductive polymer and mesoporous MCM-41 that possess novel properties not exhibited by the individual organic and inorganic materials. The physicochemical and conducting properties of two types of PNC namely, PEO/Li-MCM-41 and PANI/MCM-41 prepared by melt and solution intercalation and in situ polymerisation methods have been investigated in this thesis. The aim was to obtain a more detailed understanding of how the combination of polymers with the mesoporous MCM-41 is related to the conducting properties of the PNC. Before PEO and PANI are combined with MCM-41, several modifications of MCM-41 have been done including ion exchange of MCM-41 with lithium chloride, silylation of MCM- 41 with trimethylchlorosilane (TMCS) and functionalization of MCM-41 with sulfonic acid. The PNC obtained was characterized by X-ray diffraction (XRD), infrared (IR) spectroscopy, thermogravimetric analysis and chemical analysis, followed by 27Al, 7Li and 13C/CP MAS NMR spectroscopy. It is confirmed that the structure of MCM-41 remains intact after combining with the polymers. The results from the conductivity study have proven that the PNC possesses electrical properties. It is revealed that the conductivity of PANI/MCM-41 is very much higher than PEO/Li-MCM-41 since PANI is a conducting polymer whereas PEO is a polymer electrolyte. The combination of PEO and MCM-41 was expected to increase the conductivity of PEO/Li-MCM-41 by intercalation of PEO inside the pores of MCM-41. However, it is demonstrated that unmodified Li-MCM-41 exhibits conductivity in the same order of magnitude as the PEO/Li-MCM-41. The NMR results suggested that the interfacial interactions occurring between the PEO and Li-Al-MCM-41 is insufficient to improve the conductivity of the PEO/Li-MCM-41 nanocomposite. On the other hand, PANI/MCM-41 nanocomposite shows an increase in thermal stability of conductivity compared to PANI, although its conductivity was lower in the presence of MCM-41. 2005-08 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/3984/1/NorizahAbdulRahmanMFS2005.pdf Abdul Rahman, Norizah (2005) Polyethylene oxide-mcm-41 and polyaniline-mcm-41 nanocomposites: physicochemical and conducting properties. Masters thesis, Universiti Teknologi Malaysia, Faculty of Science. |
| spellingShingle | QD Chemistry Abdul Rahman, Norizah Polyethylene oxide-mcm-41 and polyaniline-mcm-41 nanocomposites: physicochemical and conducting properties |
| title | Polyethylene oxide-mcm-41 and polyaniline-mcm-41 nanocomposites: physicochemical and conducting properties |
| title_full | Polyethylene oxide-mcm-41 and polyaniline-mcm-41 nanocomposites: physicochemical and conducting properties |
| title_fullStr | Polyethylene oxide-mcm-41 and polyaniline-mcm-41 nanocomposites: physicochemical and conducting properties |
| title_full_unstemmed | Polyethylene oxide-mcm-41 and polyaniline-mcm-41 nanocomposites: physicochemical and conducting properties |
| title_short | Polyethylene oxide-mcm-41 and polyaniline-mcm-41 nanocomposites: physicochemical and conducting properties |
| title_sort | polyethylene oxide-mcm-41 and polyaniline-mcm-41 nanocomposites: physicochemical and conducting properties |
| topic | QD Chemistry |
| url | http://eprints.utm.my/3984/ http://eprints.utm.my/3984/1/NorizahAbdulRahmanMFS2005.pdf |