IngentaConnect 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)

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 2θ ∼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: METHYL CELLULOSE; AMMONIUM NITRATE; CONDUCTIVITY; AMORPHOUSITY; EDLC

Document Type: Research article

DOI: 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

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