THE INFLUENCE OF THE ALKALI TREATMENT ON THE PROPERTIES OF JUTE WOVEN FABRICS

Abstract

In this investigation, jute woven fabric has been alkali treated with NaOH solution (1%, 5%, 10% and 17.5%) at room temperature for different periods of time (5 and 30 min). The influence of different treatment conditions on structural properties (yarn linear density, fabric density, fabric thickness and fabric weight) and relative dielectric permeability were studied. Alkali treatment with lower NaOH concentrations (1% and 5%) decreased, but higher NaOH concentrations (10% and 17.5%) increased the yarn linear density. With increasing the concentration of NaOH, fabric density, fabric thickness and fabric weight increased. The duration of the treatment has no significant effect on these properties. More substantial changes in the effective relative dielectric permeability occurs when jute fabrics was treated with 17.5% NaOH. The duration of alkali treatment has more influence on effective relative dielectric permeability than concentration of NaOH, i.e. with increasing the duration of the treatment, effective relative dielectric permeability of investigated woven fabrics increased.

U ovom radu je proučavan uticaj različitih uslova tretiranja na strukturna svojstva (linearna gustina pređe, gustina, debljina i površinska masa tkanine) i na efektivnu relativnu dielektričnu propustljivost tkanina jute. Tkanina jute je tretirana sa NaOH (1%, 5%, 10% i 17,5%) na sobnoj temperaturi u toku različitog vremena (5 i 30 min). Alkalni tretmani pri nižim koncentracijama NaOH (1% i 5%) smanjuju, dok alkalni tretmani pri većim koncentracijama NaOH (10% i 17,5%) povećavaju linearnu gustinu pređe. Povećanje koncentracija NaOH dovodi do povećanja gustine, debljine i površinske mase tkanine. Trajanje tretmana nema značajan uticaj na promenu ovih svojstava tkanina. Veće promene u vrednosti efektivne relativne dielektrične propustljivosti su zapažene pri tretmanu sa 17,5% NaOH. Trajanje tretmana ima veći uticaj nego koncentracija NaOH na efektivnu relativnu dielektričnu propustljivost, tj. sa produženjem vremena tretiranja dolazi do povećanja vrednosti efektivne relativne dielektrične propustljivosti ispitivanih tkanina.