Chapter 4 Coating of Conducting Polymers on Natural Cellulosic Fibers Saiful Izwan Abd Razak, Nor Syuhada Azmi, Khalida Fakhruddin, Farah Nuruljannah Dahli, Izzati Fatimah Wahab, Noor Fadzliana Ahmad Sharif, Abdul Halim Mohd Yusof and Nadirul Hasraf Mat Nayan Additional information is available at the end of the chapter http://dx.doi.org/10.5772/63304 Abstract The process of combining natural cellulosic fibers with conducting polymers (CPs) is being pursued by scientist and researchers for their achievable synergistic electrical and biofriendly properties. CPs can be deposited on to a wide variety of cellulosic substrate and fibers, thus achieving good interactions between them. Various methods of deposition include in situ polymerization, physical coating, multilayering, and printing. Such materials are used for achieving more sustainable and low-cost CP-based applications. Keywords: conducting polymers, cellulosic fibers, coating, paper, electrical conductiv- ity, polyaniline, polypyrrole 1. Introduction Since the discovery of conducting polymers (CPs), extensive researches have been carried out to explore the interesting properties of this relatively new and exciting material. Their ease of preparation, low cost, and good electronic properties have lead to the discovery of many CP- related applications. Due to their uniqueness and versatility, CPs are being deposited onto © 2016 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.