A research of chemical nature and surface properties of plant disperse fillers

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dc.contributor.authorDanchenko, Yu.en
dc.contributor.authorKariev, A.en
dc.contributor.authorAndronov, V.en
dc.contributor.authorCherkashina, A.en
dc.contributor.authorLebedev, V.en
dc.contributor.authorShkolnikova, T.en
dc.contributor.authorBurlutskyi, O.en
dc.contributor.authorKosse, A.en
dc.contributor.authorLutsenko, Yu.en
dc.contributor.authorYavors'ka, D.en
dc.date.accessioned2022-01-28T12:20:25Z
dc.date.available2022-01-28T12:20:25Z
dc.date.issued2020
dc.description.abstractChemical nature and surface properties of plant disperse fillers are investigated: buckwheat (BH) and oat (OH) husk, wood (WF) and conifer flour (CF). Using IR spectroscopy, it was found that oxygen-containing atomic groups –OH, –C–O–, –C=O prevail in the filler components. It was found that a hydroxyl-hydrate layer of functional groups is present on the surface of air-dry fillers. By potentiometric titration of aqueous suspensions using the Parks–Bobyrenko method, it was determined that all fillers are of the "polyfunctional solid" type. It is shown that the hydroxyl-hydrate surface layer consists of functional groups with similar values of acid-base characteristics. Functional groups of acidic nature were additionally found on the surface of the fillers: groups with pKa≈4.37−5.66 on the BH surface, groups with pKa≈4.49−4.90 on the CF surface and groups with pKa≈3.91−4.30 on the WF surface. As a result of potentiometric titration, it was shown that the surface acidity of the fillers decreases in the WF>CF>BH>ОH series, which coincides with the one in which the total cellulose and lignin content decreases, and the resistance of fillers to thermal-oxidative breakdown increases. It was found that the rate of hydrolytic processes in aqueous suspensions at the interface decreases in the ОH>CF>BH>WF series and inversely depends on the concentration of functional groups on the surface of the fillers, and also that the change in the rate of hydrolytic processes at the interface depending on the content of fillers is described by step functions. It is revealed that for the effective use of the studied disperse waste in composite materials and as adsorbents for the extraction of pollutants, dispersion media with the following ranges of the hydrogen index are required: for BH − pH>4.4; OH − pH>6.4; WF − pH>3.9; CF − pH>4.5. The results obtained make it possible to predict and control acid-base interfacial interactions, as well as reasonably approach the development of new effective technologies.en
dc.identifier.citationA research of chemical nature and surface properties of plant disperse fillers / Yu. Danchenko [et al.] // Eastern-European Journal of Enterprise Technologies. – 2020. – Vol. 1, No. 6 (103). – P. 32-41.en
dc.identifier.doidoi.org/10.15587/1729-4061.2020.193383
dc.identifier.orcidhttps://orcid.org/0000-0003-3865-2496
dc.identifier.orcidhttps://orcid.org/0000-0002-7726-0359
dc.identifier.orcidhttps://orcid.org/0000-0001-7486-482X
dc.identifier.orcidhttps://orcid.org/0000-0002-5239-6364
dc.identifier.orcidhttps://orcid.org/0000-0001-6934-2349
dc.identifier.orcidhttps://orcid.org/0000-0002-3803-4156
dc.identifier.orcidhttps://orcid.org/0000-0003-1902-5809
dc.identifier.orcidhttps://orcid.org/0000-0001-8490-0695
dc.identifier.orcidhttps://orcid.org/0000-0002-7393-9268
dc.identifier.orcidhttps://orcid.org/0000-0003-0670-4052
dc.identifier.urihttps://repository.kpi.kharkov.ua/handle/KhPI-Press/55804
dc.language.isoen
dc.publisherPC Technology Centeren
dc.subjectplant wasteen
dc.subjectsurfaceen
dc.subjectchemical natureen
dc.subjectfunctional groupen
dc.subjectacid-base characteristicsen
dc.titleA research of chemical nature and surface properties of plant disperse fillersen
dc.typeArticleen

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Кафедра "Технологія пластичних мас і біологічно активних полімерів"