Monitoring of cellulose oxidation level by electrokinetic phenomena and numeric prediction model

Tarbuk, Anita; Grgić, Katia; Toshikj, Emilija; Domović, Daniel; Dimitrovski, Dejan; Dimova, Vesna; Jordanov, Igor

doi:10.1007/s10570-020-03028-6

Cited by 19 publications

(20 citation statements)

References 29 publications

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“…At the plateau value of ζ‒potential at pH 8–10, the acidic groups are completely dissociated [ 75 , 76 , 77 , 78 , 79 , 80 ].…”

Section: Resultsmentioning

confidence: 99%

“…Another phenomenon can be observed for all treated surfaces. At pH 4, the surface became more negative due to the shift the shear plane into the liquid phase, causing a reduction of in the ζ-potential [75][76][77]. This indicates fiber swelling.…”

Section: Synthesismentioning

confidence: 99%

“…The swelling of fibers at the surface is superimposed on the dissociation of surface functional groups above pH 5. Acidic surface groups are At the plateau value of ζ-potential at pH 8-10, the acidic groups are completely dissociated [75][76][77][78][79][80]. The hydroxyproline and proline derivatives were also effective when attached to calcium alginate materials.…”

Section: Synthesismentioning

confidence: 99%

“…The swelling of fibers at the surface is superimposed on the dissociation of surface functional groups above pH 5. Acidic surface groups are introduced, increasing the hydrophilic character of the surface [75][76][77][78][79][80]. A difference between the Ca-alginate before and after modification can be noticed in the pH range of 3-4.…”

Section: Synthesismentioning

confidence: 99%

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Conjugates of Chitosan and Calcium Alginate with Oligoproline and Oligohydroxyproline Derivatives for Potential Use in Regenerative Medicine

et al. 2020

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New materials that are as similar as possible in terms of structure and biology to the extracellular matrix (external environment) of cells are of great interest for regenerative medicine. Oligoproline and oligohydroxyproline derivatives (peptides 2–5) are potential mimetics of collagen fragments. Peptides 2–5 have been shown to be similar to the model collagen fragment (H-Gly-Hyp-Pro-Ala-Hyp-Pro-OH, 1) in terms of both their spatial structure and biological activity. In this study, peptides 2–5 were covalently bound to nonwovens based on chitosan and calcium alginate. Incorporation of the peptides was confirmed by Fourier transform -infrared (FT-IR) and zeta potential measurements. Biological studies (cell metabolic activity by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) test and Live/Dead assay) proved that the obtained peptide-polysaccharide conjugates were not toxic to the endothelial cell line EA.hy 926. In many cases, the conjugates had a highly affirmative influence on cell proliferation. The results of this study show that conjugates of chitosan and calcium alginate with oligoproline and oligohydroxyproline derivatives have potential for use in regenerative medicine.

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“…At the plateau value of ζ‒potential at pH 8–10, the acidic groups are completely dissociated [ 75 , 76 , 77 , 78 , 79 , 80 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Synthesismentioning

confidence: 99%

Section: Synthesismentioning

confidence: 99%

Section: Synthesismentioning

confidence: 99%

See 2 more Smart Citations

Conjugates of Chitosan and Calcium Alginate with Oligoproline and Oligohydroxyproline Derivatives for Potential Use in Regenerative Medicine

et al. 2020

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“…1 The dissociation ability of these groups affects the distribution of the surface charge, as well as the thickness and distribution of the electrochemical double layer, altogether resulting in changed zeta potential and isoelectric point. 2 According to that, it can be said that the alkali and oxidative modifications of raw jute fabric change its electrokinetic properties as well as alter the interaction with the liquid phase components. An extensive understanding of the jute fabrics' electrokinetic properties is still needed to optimize chemical modification processes, which might help to increase the utilization of such modified fabrics.…”

Section: Introductionmentioning

confidence: 99%

Electrokinetic properties of chemically modified jute fabrics

Ivanovska

Kostić

2020

J Serb Chem Soc

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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 lignina removal and mentioned higher availability of newly formed carboxyl groups.

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Electrokinetic and sorption properties of hydrogen peroxide treated flax fibers (Linum usitatissimum L.)

et al. 2021

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Monitoring of cellulose oxidation level by electrokinetic phenomena and numeric prediction model

Cited by 19 publications

References 29 publications

Conjugates of Chitosan and Calcium Alginate with Oligoproline and Oligohydroxyproline Derivatives for Potential Use in Regenerative Medicine

Conjugates of Chitosan and Calcium Alginate with Oligoproline and Oligohydroxyproline Derivatives for Potential Use in Regenerative Medicine

Electrokinetic properties of chemically modified jute fabrics

Electrokinetic and sorption properties of hydrogen peroxide treated flax fibers (Linum usitatissimum L.)

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