Electrokinetic properties of chemically modified jute fabrics
Article (Published version)
Metadata
Show full item recordAbstract
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 potentialSource:
Journal of the Serbian Chemical Society, 2020, 85, 1-7Publisher:
- Serbian Chemical Society, Belgrade
Funding / projects:
DOI: 10.2298/JSC201013069I
ISSN: 0352-5139
PubMed:
WoS: 000617343400008
Scopus: 2-s2.0-85096916620
Collections
Institution/Community
Tehnološko-metalurški fakultetTY - 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 .