Charge-trapping capability and AC conductivity at different humidities of poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres

• DOI: 10.1007/s00226-018-0994-1
• Publication Date: 2018-02-08T05:26:24Z
• Authors: A. S. Luyt; B. Škipina; L. Csóka; D. Dudić
• Keywords: electrical conductivity; charge trapping; ethyleneimine; charges; cellulose based materials; 02 engineering and technology; Different Humidities; anthocyanins; 7. Clean energy; AC conductivity; textile fibers; dielectric properties; electric conductivity; 13. Climate action; humidity conditions; Cellulose Fibres; Titanium dioxide; Modified Cellulose; high-k dielectric; dielectric properties of solids; 0210 nano-technology; anthocyanin modified

Modified cellulose materials are finding increasing application in electronics, because of the need for more environmental-friendly electronic circuits. The papers prepared from poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres are completely environmentally friendly and can be applied to the construction of photocells or photo-/humidity sensors. To better understand the mechanisms of electrical conductivity of the said cellulose composites, the effect of humidity (RH = 9% → 100%) on its dielectric properties is presented in this article. The possibility of trapping the negative and positive charges in the composite under different humidity conditions is also examined. A large number of studies suggest that proton conductivity, stimulated by humidity, is the dominant mechanism of electrical conductivity in cellulose-based materials. The results presented in this paper indicate that the electronic conductivity mechanisms also play a significant role in papers prepared from poly(ethyleneimine)–TiO2–anthocyanin-modified cellulose fibres.