On complexation between methyl cellulose and ammonium nitrate
Films of methyl cellulose (MC) doped with ammonium nitrate (NH(4)NO(3)) salt were prepared by solution casting. From X-ray diffraction, it can be inferred that films of pure MC and MC doped with 5 to 25 wt-% NH(4)NO(3) are amorphous. A small peak at 2 theta similar to 8 degrees indicates that there...
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| Format: | Article |
| Published: |
2009
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| Online Access: | http://www.ingentaconnect.com/content/maney/mri/2009/00000013/00000003/art00031?token=0052123c05275c277b4257746766766b2524443a762f592f653b672c57582a72752d70557f7cd03cc6 http://www.ingentaconnect.com/content/maney/mri/2009/00000013/00000003/art00031?token=0052123c05275c277b4257746766766b2524443a762f592f653b672c57582a72752d70557f7cd03cc6 |
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| Summary: | Films of methyl cellulose (MC) doped with ammonium nitrate (NH(4)NO(3)) salt were prepared by solution casting. From X-ray diffraction, it can be inferred that films of pure MC and MC doped with 5 to 25 wt-% NH(4)NO(3) are amorphous. A small peak at 2 theta similar to 8 degrees indicates that there is interaction between MC and NH(4)NO(3) and a complex has formed. Pure MC has a conductivity of 3.08 x 10(-11) S cm(-1) at room temperature and the conductivity of MC doped with 25 wt-% NH(4)NO(3) is 2.10 x 10(-6) S cm(-1). The increase in conductivity is attributed to the increase in amorphousity and to the increase in number of mobile cations. However, for the sample doped with 30 wt-% NH(4)NO(3), some of the salt has recrystallised out of the polymer host. This is evidenced from the X-ray diffractogram. Recrystallisation of the salt reduces the number of mobile ions for conduction and resulted in a decrease in conductivity. The highest conducting sample was used as an electrolyte in an electric double layer capacitor. |
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