Uticaj pratećih komponenata vlakana konoplje na njihovu električnu otpornost

Hemp fibres belong to the group of natural, cellulose bast fibres. These fibres have exceptional properties such as: antimicrobial effect, absence of allergy effect, extraordinary sorption properties, good electro-physical properties (small static electricity in regard to other cellulose fibres) as well as high values of breaking strength (the natural fibre with the highest strength). However, hemp fibres have some defects: heterogeneous chemical composition, large quantity of accompanying substances (lignin pectins, waxes) and unsatisfactory fineness and evenness. It is possible to a great extent to eliminate or reduce, the defects of hemp fibres by of appropriate modification treatments. In order to determine the appropriate modification treatment of hemp fibres, the dependences between the chemical composition, fineness and electric resistance of hemp fibres were presented in this paper. In the experimental part of the paper, by the application of a procedure for the determination of the chemical composition, the accompanying supstances of hemp fibres were gradually removed. After each phase some fibrous substrates were separated. After that the fineness and electric resistance were determined. This experiment was conducted in order to define the influence of each component of hemp fibres on the fineness and electric resistance. In this paper, hemp fibres were modified by an aqueous solution of sodium hydroxide, under different conditions of modification. The influence of modification conditions on the fineness and electric resistance were studied.U cilju iznalaženja zadovoljavajućeg postupka modifikovanja vlakana konoplje u ovom radu su prikazane zavisnosti između hemijskog sastava, finoće i električne otpornosti. Prema proceduri za određivanje hemijskog sastava sukcesivno su uklanjane jedna po jedna prateća komponenta iz vlakana konoplje. Nakon svake etape odvojena je izvesna količina vlaknastog supstrata, a potom su izvršena merenja finoće i električne otpornosti, u cilju utvrđivanja uticaja svake komponente iz vlakana konoplje na pomenute karakteristike. Takođe je izvršena analiza uticaja eksperimentalnih uslova na finoću i električnu otpornost pri uobičajenom postupku modifikovanja vlakana konoplje zasnovanom na njihovom tretiranju rastvorom natrijumhidroksida