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Influence of thermodynamic parameters on the synthesis of porous silicate materials and their functional application

dc.contributor.advisorRadović, Ivona
dc.contributor.otherNenadović, Snežana
dc.contributor.otherKijevčanin, Mirjana
dc.contributor.otherKljajević, Ljiljana
dc.contributor.otherMirković, Miljana M.
dc.creatorIvanović, Marija M.
dc.date.accessioned2022-09-06T14:02:58Z
dc.date.available2022-09-06T14:02:58Z
dc.date.issued2021-09-06
dc.identifier.urihttps://uvidok.rcub.bg.ac.rs/bitstream/handle/123456789/4430/Referat.pdf
dc.identifier.urihttps://eteze.bg.ac.rs/application/showtheses?thesesId=8721
dc.identifier.urihttps://fedorabg.bg.ac.rs/fedora/get/o:26295/bdef:Content/download
dc.identifier.urihttps://plus.cobiss.net/cobiss/sr/sr/bib/70934025
dc.identifier.urihttps://nardus.mpn.gov.rs/handle/123456789/20624
dc.description.abstractGlavni cilj ove doktorske disertacije je sinteza poroznog aluminosilikatnog materijala za potencijalnu primenu u oblasti zaštite životne sredine. Aluminosilikatni materijali ekološki su prihvatljivi u smislu energetske efiksanosti i male potrošnje energije za sintezu. Sinteza ovakvih materijala podrazumeva i smanjenje proizvodnje gasova sa efektom staklene bašte, odnosno CO2. U prvom delu doktorske disertacije ispitivane su termodinamičke karakteristike homogenih rastvora alkalnih aktivatora na osnovu kojih se mogu tumačiti molekulske interakcije unutar rastvora. Ispraćena je promena termodinamičkih parametara (gustine, viskoznosti, indeksa refrakcije i brzine zvuka) u zavisnosti od temperature. Porozni silikatni materijali sintetisani su od polazne komponente (metakaolin-MK), alkalnog aktivatora koji se sastoji od rastvora NaOH različitih koncentracija (2M-16M NaOH) i natrijum silikata. Potencijalna primena usmerena je na ispitivanje adsorpcionih karakteristika ovih materijala za adsorpciju teških metala i ispitane su mehaničke osobine materijala radi potencijalne primene u građevinarstvu. Umrežena je i organska faza (poli(vinil-alkohol)-(PVA)) radi poboljšanja karakteristika sintetisanog materijala. Različitim metodama (rendgenska difrakciona analiza (XRD), Furijeova transformacija infracrvena spektroskopija (FTIR), Raman spektorskopija, Skenirajuća elektronska mikroskopija, (SEM)) analizirane su promene strukture sintetisanog materijala kao i morfologije čestica prahova prekursora i mikrostruktura sintetisanih uzoraka. Rendgenskom flurescentnom analizom (XRF) određen je hemijski sastav polaznih sirovina i sintetisanog materijala. XRD analizom i Raman spektroskopijom izvršena je identifikacija faza i praćenje veličina kristalita i udela amorfne faze u sintetisanom poroznom silikatnom materijalu. SEM metodom je ispitana morfologija čestica prahova prekursora, veličina i oblik pora sintetisanih poroznih materijala, a metodom energetske disperzione spektroskopije (EDS) utvrđen je sastav čestica prahova i faza kako prekursora, tako i sintetisanih materijala. Veličina čestica sintetisanih materijala praćena je laserskom metodom za određivanje veličine čestica. Određena je specifična površina i poroznost sintetisanog materijala pomoću BET metode. Ispraćen je proces polimerizacije alkalno-aktiviranog materijala (AAM) XRD i FTIR analizom. MALDI-TOF metodom potvrđeni su sintetisani polimerni materijali. Ispitana je i prirodna radioaktivnost materijala polazne sirovine, metafaze i polimernog materijala. Urađena je i termička analiza pomoću TGA/DTA metode. Takođe je urađena i karakterizacija termički tretiranih uzoraka kao i rendgenska fotoelektronska spektroskopija (XPS)sr
dc.description.abstractThe main goal of this doctoral dissertation is the synthesis of porous aluminosilicate materials for potential application in the field of environmental protection. Aluminosilicate materials are environmentally friendly in terms of energy efficiency and low energy consumption for synthesis. The synthesis of such materials implies a reduction in the production of greenhouse gases, i.e., CO2. In the first part of the doctoral dissertation, the thermodynamic characteristics of homogeneous solutions of alkaline activators were examined, on the basis of which molecular interactions within the solution can be interpreted. The change of thermodynamic parameters (density, viscosity, refractive index and speed of sound) depending on temperature was monitored. Porous silicate materials were synthesized from the starting component (metakaolin-MK), an alkaline activator consisting of a solution of NaOH of different concentrations (2M-16M NaOH) and sodium silicate. The potential application is aimed at testing the adsorption properties of these materials for adsorption of heavy metals and the mechanical properties of the materials for potential application in construction have been examined. The organic phase (Poly(vinyl alcohol) (PVA)) was also crosslinked to improve the characteristics of the synthesized material. Changes in the structure of the synthesized material as well as the morphology of the precursor powder particles and the microstructure of the synthesized samples were analyzed by various methods (X - ray diffraction analysis (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, Scanning electron microscopy (SEM)). The chemical composition of the starting materials and the synthesized material was performed by X - ray fluorescence analysis (XRF). XRD and Raman spectroscopy identified the phases and monitored the crystallite size and the proportion of the amorphous phase in the synthesized porous silicate material. SEM examined the morphology of precursor powder particles, pore size and shape of synthesized porous materials, and the composition of powder particles and phases of both precursors and synthesized materials was determined by energy dispersion spectroscopy (EDS). The particle size of the synthesized materials was monitored by the laser method for determining the particle size. The specific surface area and porosity of the synthesized material were determined using the BET method. The polymerization process of alkali-activated material (AAM) was monitored by XRD and FTIR method. The synthesized polymeric materials were confirmed by the MALDI-TOF method. The natural radioactivity of the raw material, metaphase and polymeric material was also examined. Thermal analysis was performed using the TGA / DTA method. Characterization of thermally treated samples as well as X-ray photoelectron spectroscopy (XPS) was also performed.en
dc.formatapplication/pdf
dc.languagesr
dc.publisherУниверзитет у Београду, Технолошко-металуршки факултетsr
dc.rightsopenAccessen
dc.sourceУниверзитет у Београдуsr
dc.subjecttermodinamički parametri, porozni materijali, AAM, geopolimerizacija, TGA/DTA, PVA, adsorpcija, XRD, SEM, FTIR, BET, MALDI, Gama spektroskopijasr
dc.subjectthermodynamic parameters, porous materials, AAM, geopolymerization, TGA / DTA, PVA, adsorption, XRD, SEM, FTIR, BET, MALDI, Gamma spectroscopyen
dc.titleUticaj termodinamičkih parametara na sintezu poroznih silikatnih materijala i njihova funkcionalna primenasr
dc.title.alternativeInfluence of thermodynamic parameters on the synthesis of porous silicate materials and their functional applicationen
dc.typedoctoralThesis
dc.rights.licenseARR
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/145461/Disertacija_12427.pdf
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/145462/Izvestaj_Komisije_12427.pdf
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_nardus_20624


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