Original scientific paper
Investigation of Modification of Flax Fibers Using Citric Acid
Ružica Šurina
; University of Zagreb, Faculty of TExtile Technology
Maja Andrassy
; University of Zagreb, Faculty of TExtile Technology
Drago Katović
; University of Zagreb, Faculty of TExtile Technology
Abstract
Due to the crosslinking of cellulose by polycarboxylic acids, textile materials crease less, become softer, smoother, their ironing is easier, and their pilling is lower. In contrast to the mentioned positive advantages, mechanical textile properties decrease at the same time (breaking force and abrasion resistance). Investigations of the impact of chemical or physical intervention on the flax fiber properties are described in the paper. Chemical modification was carried out by crosslinking cellulose molecules using citric acid and four chemically different catalysts. Physical modification was carried out by ultrasound. The investigations are carried out to modify the molecular and supermolecular structure of flax fibers with the aim of improving crease resistance and to maintain satisfactory resistance to tensile stress and abrasion. The investigation results indicate that, depending on the catalyst used for crosslinking, citric acid modification has a different effect on the properties investigated (construction parameters, air permeability, mechanical properties and crease resistance). Exposure of specimens to ultrasound affects the improvement of friction resistance and tensile force.
Keywords
flax fibers; citric acid; ultrasound; properties of modification flax fibers
Hrčak ID:
32863
URI
Publication date:
3.2.2008.
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