Effect of chemical treatments on the chemical composition and properties of flax fibers
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Flax fibers were modified with NaOH and NaClO2 under different conditions in order to not only clarify the effects of hemicelluloses and lignin removal on the morphology and properties of flax fibers, but also to improve the fiber quality. The quality of flax fibers was characterized in terms of chemical composition, fineness, whiteness, and mechanical and sorption properties. Both treatments, alkali treatment leading to hemicelluloses removal ( up to 72 %) and chlorite treatment leading to lignin removal ( up to 96 %), induce a modification of the morphology and properties of flax fibers. For 5 % NaOH treatments, as well as all NaClO2 treatments, an increase in the crystallinity was observed, while for higher NaOH concentrations, the mercerization phenomenon induced a slight decrease in the crystallinity. Modification with NaClO2 resulted in fiber fibrillation while modification with NaOH at boiling temperature resulted in smoother fiber surfaces. Both treatments cause a decrease in t...ensile strength and water retention values, with the maximal decrease obtained with NaOH treatment at boiling temperature. Chlorite treatment resulted in finer fibers having a higher whiteness index compare to the alkali-modified fibers.
Keywords:
bast fibers / alkali treatment / chlorite treatment / chemical composition / fiber propertiesSource:
Journal of the Serbian Chemical Society, 2017, 82, 1, 83-97Publisher:
- Srpsko hemijsko društvo, Beograd
Funding / projects:
- Ministry of Science and Technology of the Republic of Srpska [19/6-020/961-138/12]
- Functionalization, characterization and application of cellulose and cellulose derivatives (RS-172029)
DOI: 10.2298/JSC160707106L
ISSN: 0352-5139
WoS: 000396581500008
Scopus: 2-s2.0-85011710620
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Lazić, Biljana D. AU - Janjić, Svjetlana AU - Rijavec, Tatjana AU - Kostić, Mirjana PY - 2017 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3691 AB - Flax fibers were modified with NaOH and NaClO2 under different conditions in order to not only clarify the effects of hemicelluloses and lignin removal on the morphology and properties of flax fibers, but also to improve the fiber quality. The quality of flax fibers was characterized in terms of chemical composition, fineness, whiteness, and mechanical and sorption properties. Both treatments, alkali treatment leading to hemicelluloses removal ( up to 72 %) and chlorite treatment leading to lignin removal ( up to 96 %), induce a modification of the morphology and properties of flax fibers. For 5 % NaOH treatments, as well as all NaClO2 treatments, an increase in the crystallinity was observed, while for higher NaOH concentrations, the mercerization phenomenon induced a slight decrease in the crystallinity. Modification with NaClO2 resulted in fiber fibrillation while modification with NaOH at boiling temperature resulted in smoother fiber surfaces. Both treatments cause a decrease in tensile strength and water retention values, with the maximal decrease obtained with NaOH treatment at boiling temperature. Chlorite treatment resulted in finer fibers having a higher whiteness index compare to the alkali-modified fibers. PB - Srpsko hemijsko društvo, Beograd T2 - Journal of the Serbian Chemical Society T1 - Effect of chemical treatments on the chemical composition and properties of flax fibers EP - 97 IS - 1 SP - 83 VL - 82 DO - 10.2298/JSC160707106L ER -
@article{ author = "Lazić, Biljana D. and Janjić, Svjetlana and Rijavec, Tatjana and Kostić, Mirjana", year = "2017", abstract = "Flax fibers were modified with NaOH and NaClO2 under different conditions in order to not only clarify the effects of hemicelluloses and lignin removal on the morphology and properties of flax fibers, but also to improve the fiber quality. The quality of flax fibers was characterized in terms of chemical composition, fineness, whiteness, and mechanical and sorption properties. Both treatments, alkali treatment leading to hemicelluloses removal ( up to 72 %) and chlorite treatment leading to lignin removal ( up to 96 %), induce a modification of the morphology and properties of flax fibers. For 5 % NaOH treatments, as well as all NaClO2 treatments, an increase in the crystallinity was observed, while for higher NaOH concentrations, the mercerization phenomenon induced a slight decrease in the crystallinity. Modification with NaClO2 resulted in fiber fibrillation while modification with NaOH at boiling temperature resulted in smoother fiber surfaces. Both treatments cause a decrease in tensile strength and water retention values, with the maximal decrease obtained with NaOH treatment at boiling temperature. Chlorite treatment resulted in finer fibers having a higher whiteness index compare to the alkali-modified fibers.", publisher = "Srpsko hemijsko društvo, Beograd", journal = "Journal of the Serbian Chemical Society", title = "Effect of chemical treatments on the chemical composition and properties of flax fibers", pages = "97-83", number = "1", volume = "82", doi = "10.2298/JSC160707106L" }
Lazić, B. D., Janjić, S., Rijavec, T.,& Kostić, M.. (2017). Effect of chemical treatments on the chemical composition and properties of flax fibers. in Journal of the Serbian Chemical Society Srpsko hemijsko društvo, Beograd., 82(1), 83-97. https://doi.org/10.2298/JSC160707106L
Lazić BD, Janjić S, Rijavec T, Kostić M. Effect of chemical treatments on the chemical composition and properties of flax fibers. in Journal of the Serbian Chemical Society. 2017;82(1):83-97. doi:10.2298/JSC160707106L .
Lazić, Biljana D., Janjić, Svjetlana, Rijavec, Tatjana, Kostić, Mirjana, "Effect of chemical treatments on the chemical composition and properties of flax fibers" in Journal of the Serbian Chemical Society, 82, no. 1 (2017):83-97, https://doi.org/10.2298/JSC160707106L . .