Phosphoric acid doped N-phthaloylchitosan as polymer electrolyte membrane
To diversify the applications of chitosan, structural modifications are required. In this work the modified chitosan were synthesized using phthalic anhydride. N-phthaloylation is said to be one of the potential methods to improve the solubility of chitosan in organic solvents. The precipitate obta...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/11177/1/phosphoric_acid_doped.pdf |
| _version_ | 1825719978447339520 |
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| author | Yusuf, S.N.F. Arof, Abdul Kariem Majid, S.R. Yahya, R. |
| author_facet | Yusuf, S.N.F. Arof, Abdul Kariem Majid, S.R. Yahya, R. |
| author_sort | Yusuf, S.N.F. |
| collection | UM |
| description | To diversify the applications of chitosan, structural modifications are required. In this work the modified chitosan were synthesized using phthalic anhydride. N-phthaloylation is said to be one of the potential methods to improve the solubility of chitosan in organic solvents. The
precipitate obtained after drying in vacuum is yellowish in color and powdery in nature. FTIR proved the occurrence of phthaloylation. 'H NMR spectrum exhibits two sets of broad peaks The FTIR and 'H NMR spectra verified the occurrence of phthaloylation at the amino group of the chitosan. Phthaloyl chitosan shows excellent solubility in organic solvents such as DMF, DMSO, DMAc, and pyridine. The chemically modified chitosan was able to form transparent films by the solvent casting method. Phosphoric acid was introduced as the doping
acid at various concentrations from 5 to 25 wt. %. The doped films are also evaluated for its electrical properties using impedance spectroscopy. The maximum conductivity of PhCh film was found to be 2.03 x 10-5 S cm-' exhibited by the film containing 25 wt. % phosphoric acid. |
| first_indexed | 2024-03-06T05:27:59Z |
| format | Conference or Workshop Item |
| id | um.eprints-11177 |
| institution | Universiti Malaya |
| language | English |
| last_indexed | 2024-03-06T05:27:59Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | um.eprints-111772018-10-04T06:07:05Z http://eprints.um.edu.my/11177/ Phosphoric acid doped N-phthaloylchitosan as polymer electrolyte membrane Yusuf, S.N.F. Arof, Abdul Kariem Majid, S.R. Yahya, R. TA Engineering (General). Civil engineering (General) To diversify the applications of chitosan, structural modifications are required. In this work the modified chitosan were synthesized using phthalic anhydride. N-phthaloylation is said to be one of the potential methods to improve the solubility of chitosan in organic solvents. The precipitate obtained after drying in vacuum is yellowish in color and powdery in nature. FTIR proved the occurrence of phthaloylation. 'H NMR spectrum exhibits two sets of broad peaks The FTIR and 'H NMR spectra verified the occurrence of phthaloylation at the amino group of the chitosan. Phthaloyl chitosan shows excellent solubility in organic solvents such as DMF, DMSO, DMAc, and pyridine. The chemically modified chitosan was able to form transparent films by the solvent casting method. Phosphoric acid was introduced as the doping acid at various concentrations from 5 to 25 wt. %. The doped films are also evaluated for its electrical properties using impedance spectroscopy. The maximum conductivity of PhCh film was found to be 2.03 x 10-5 S cm-' exhibited by the film containing 25 wt. % phosphoric acid. 2009-06 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.um.edu.my/11177/1/phosphoric_acid_doped.pdf Yusuf, S.N.F. and Arof, Abdul Kariem and Majid, S.R. and Yahya, R. (2009) Phosphoric acid doped N-phthaloylchitosan as polymer electrolyte membrane. In: National Workshop on Functional Materials 2009, 16 June 2009, Centre For Ionics, University of Malaya. |
| spellingShingle | TA Engineering (General). Civil engineering (General) Yusuf, S.N.F. Arof, Abdul Kariem Majid, S.R. Yahya, R. Phosphoric acid doped N-phthaloylchitosan as polymer electrolyte membrane |
| title | Phosphoric acid doped N-phthaloylchitosan as polymer
electrolyte membrane |
| title_full | Phosphoric acid doped N-phthaloylchitosan as polymer
electrolyte membrane |
| title_fullStr | Phosphoric acid doped N-phthaloylchitosan as polymer
electrolyte membrane |
| title_full_unstemmed | Phosphoric acid doped N-phthaloylchitosan as polymer
electrolyte membrane |
| title_short | Phosphoric acid doped N-phthaloylchitosan as polymer
electrolyte membrane |
| title_sort | phosphoric acid doped n phthaloylchitosan as polymer electrolyte membrane |
| topic | TA Engineering (General). Civil engineering (General) |
| url | http://eprints.um.edu.my/11177/1/phosphoric_acid_doped.pdf |
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