CUED Publications database

Dielectric behaviour of montmorillonite/cyanoethylated cellulose nanocomposites

Madusanka, N and Shivareddy, SG and Eddleston, MD and Hiralal, P and Oliver, RA and Amaratunga, GAJ (2017) Dielectric behaviour of montmorillonite/cyanoethylated cellulose nanocomposites. Carbohydrate Polymers, 172. pp. 315-321. ISSN 0144-8617

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A dielectric nanocomposite based oncyanoethylatedcellulose (CRS) and MMT nanoclay was successfully prepared with different weight percentages (5%, 10% and 15%) of MMT. MMT nanoplatets obtained via sonication of MMT nanoclay in acetone for a prolonged period was used in the preparation of CRS-MMT nanocomposites. CRS-MMT thin films on SiO /Si wafers are used to form metal-insulator-metal (MIM) type capacitors. At 1 kHz CRS-MMT nanocomposites exhibited high dielectric constants (ε ) of 71, 55 and 42 with low leakage current densities (10 –10 A/cm ) for nanocomposites with 5%, 10% and 15% weight of MMT respectively, higher than values of pure CRS (21), Na-MMT(10). Reduction of ε with higher MMT loading can be attributed to a network formation as evidenced via strong bonding interactions between CRS and MMT leading to a lower molecular mobility. The leakage is studied using conductive atomic force microscopy (C-AFM) indicates that leakage pathways are associated with MMT nanoplatelets embedded in the CRS polymer matrix. 2 r r −6 −7 2

Item Type: Article
Uncontrolled Keywords: CRS polymer Conductive AFM Dielectrics Montmorillonite Nanocomposite
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:11
Last Modified: 10 Apr 2021 00:42
DOI: 10.1016/j.carbpol.2017.05.057