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Electrokinetic properties of chemically modified jute fabrics

Thumbnail
2020
0352-51392000069I.pdf (3.824Mb)
Authors
Ivanovska, Aleksandra
Kostić, Mirjana
Article (Published version)
Metadata
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Abstract
This work aims to study the alkali and oxidatively modified jute fabrics' electrokinetic properties. In contrast to control fabric, chemically modified jute fabrics have a small positive zeta potential in a basic pH range which can be attributed to the presence of sodium cations (originating from mentioned chemical modifications) on their surfaces. At lower pH values, samples modified under milder alkali and oxidative conditions have about 2.2-3.5 times lower zeta potential since the protonation process leads to the formation of higher positive charge in the electrochemical double layer causing higher adsorption of Cl-ions (originating from the electrolyte). On the other hand, more intensive chemical modifications increased the zeta potential at lower pH values due to the increased amount of carboxyl groups and fibers' ability for water retention and hence swelling. The isoelectric point of fabrics having lower zeta potential than control fabric was shifted toward higher pH values poin...ting out lower contribution of fabrics' surface acidic groups. In the case of extensive oxidation conditions (60 and 90 min), the isoelectric point was shifted toward lower pH values as a result of lignin removal and mentioned higher availability of newly formed carboxyl groups.

Keywords:
Hemicelluloses / Isoelectric point / Lignin / Zeta potential
Source:
Journal of the Serbian Chemical Society, 2020, 85, 1-7
Publisher:
  • Serbian Chemical Society, Belgrade
Funding / projects:
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200135 (University of Belgrade, Faculty of Technology and Metallurgy) (RS-200135)

DOI: 10.2298/JSC201013069I

ISSN: 0352-5139

PubMed:

WoS: 000617343400008

Scopus: 2-s2.0-85096916620
[ Google Scholar ]
4
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4571
Collections
  • Radovi istraživača (Inovacioni centar) / Researchers’ publications (Innovation Centre)
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - JOUR
AU  - Ivanovska, Aleksandra
AU  - Kostić, Mirjana
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4571
AB  - This work aims to study the alkali and oxidatively modified jute fabrics' electrokinetic properties. In contrast to control fabric, chemically modified jute fabrics have a small positive zeta potential in a basic pH range which can be attributed to the presence of sodium cations (originating from mentioned chemical modifications) on their surfaces. At lower pH values, samples modified under milder alkali and oxidative conditions have about 2.2-3.5 times lower zeta potential since the protonation process leads to the formation of higher positive charge in the electrochemical double layer causing higher adsorption of Cl-ions (originating from the electrolyte). On the other hand, more intensive chemical modifications increased the zeta potential at lower pH values due to the increased amount of carboxyl groups and fibers' ability for water retention and hence swelling. The isoelectric point of fabrics having lower zeta potential than control fabric was shifted toward higher pH values pointing out lower contribution of fabrics' surface acidic groups. In the case of extensive oxidation conditions (60 and 90 min), the isoelectric point was shifted toward lower pH values as a result of lignin removal and mentioned higher availability of newly formed carboxyl groups.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Electrokinetic properties of chemically modified jute fabrics
EP  - 7
SP  - 1
VL  - 85
DO  - 10.2298/JSC201013069I
UR  - conv_6384
ER  - 
@article{
author = "Ivanovska, Aleksandra and Kostić, Mirjana",
year = "2020",
abstract = "This work aims to study the alkali and oxidatively modified jute fabrics' electrokinetic properties. In contrast to control fabric, chemically modified jute fabrics have a small positive zeta potential in a basic pH range which can be attributed to the presence of sodium cations (originating from mentioned chemical modifications) on their surfaces. At lower pH values, samples modified under milder alkali and oxidative conditions have about 2.2-3.5 times lower zeta potential since the protonation process leads to the formation of higher positive charge in the electrochemical double layer causing higher adsorption of Cl-ions (originating from the electrolyte). On the other hand, more intensive chemical modifications increased the zeta potential at lower pH values due to the increased amount of carboxyl groups and fibers' ability for water retention and hence swelling. The isoelectric point of fabrics having lower zeta potential than control fabric was shifted toward higher pH values pointing out lower contribution of fabrics' surface acidic groups. In the case of extensive oxidation conditions (60 and 90 min), the isoelectric point was shifted toward lower pH values as a result of lignin removal and mentioned higher availability of newly formed carboxyl groups.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Electrokinetic properties of chemically modified jute fabrics",
pages = "7-1",
volume = "85",
doi = "10.2298/JSC201013069I",
url = "conv_6384"
}
Ivanovska, A.,& Kostić, M.. (2020). Electrokinetic properties of chemically modified jute fabrics. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 85, 1-7.
https://doi.org/10.2298/JSC201013069I
conv_6384
Ivanovska A, Kostić M. Electrokinetic properties of chemically modified jute fabrics. in Journal of the Serbian Chemical Society. 2020;85:1-7.
doi:10.2298/JSC201013069I
conv_6384 .
Ivanovska, Aleksandra, Kostić, Mirjana, "Electrokinetic properties of chemically modified jute fabrics" in Journal of the Serbian Chemical Society, 85 (2020):1-7,
https://doi.org/10.2298/JSC201013069I .,
conv_6384 .

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