On complexation between methyl cellulose and ammonium nitrate

Authors: Shuhaimi, N. E. A.¹; Majid, S. R.¹; Arof, A. K.²

Source: Materials Research Innovations, Volume 13, Number 3, September 2009 , pp. 239-242(4)

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Abstract:

Films of methyl cellulose (MC) doped with ammonium nitrate (NH₄NO₃) 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-% NH₄NO₃ are amorphous. A small peak at 2 ∼8� indicates that there is interaction between MC and NH₄NO₃ and a complex has formed. Pure MC has a conductivity of 3�08 � 10^–11 S cm^–1 at room temperature and the conductivity of MC doped with 25 wt-% NH₄NO₃ is 2�10 � 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-% NH₄NO₃, 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.

Keywords: AMMONIUM NITRATE; AMORPHOUSITY; CONDUCTIVITY; EDLC; METHYL CELLULOSE

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/143307509X440406

Affiliations: 1: Department of Physics, University of Malaya at Kuala Lumpur, Malaysia 2: Department of Physics, University of Malaya at Kuala Lumpur, Malaysia;, Email: akarof@um.edu.my

Publication date: 2009-09-01

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