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The effect of water on electrical properties of polymer composites with cellulose fibers

P. V. NOTINGHER1,* , D. PANAITESCU2, Z. VULUGA2, M. IORGA2, H. PAVEN2, D. FLOREA2

Affiliation

  1. POLITEHNICA University of Bucharest, 313 Splaiul Independentei, 060042, Bucharest, Romania
  2. ICECHIM National Institute of Research and Development in Chemistry and Petrochemistry, 202 Splaiul Independentei, 060021, Bucharest, Romania

Abstract

Polymer composites with cellulose fibbers are environmental friendly materials with improved mechanical properties. The use of polymer composites with natural fibbers in electrotechnics is hindered by the inherent high moisture absorption of celulose fibbers, which determines a reduction of electrical properties of composite material. By appropriate chemical surface treatment of celulose fibbers the effect of water could be diminished. Polypropylene composites with a uniform dispersion of surface treated celulose fibbers were obtained and characterised. The mechanical properties (tensile strength, modulus of elasticity, hardness) and electrical properties (volume and surface resistivity) of polymer composites are reported. Mechanical and electrical tests point out the efficiency of physical and chemical treatment of celulose fibbers. The volume resistivity of polymer composite remains almost unchanged after immersion in water when treated cellulose fibbers were used. The treatment with agents capable of creating chemical bonds with cellulose fibbers gives the best results..

Keywords

Polymer composites, Electrical conductivity, Cellulose fibers.

Submitted at: Jan. 18, 2006
Accepted at: March 23, 2006

Citation

P. V. NOTINGHER, D. PANAITESCU, Z. VULUGA, M. IORGA, H. PAVEN, D. FLOREA, The effect of water on electrical properties of polymer composites with cellulose fibers, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 687-689 (2006)