Title
Novi nanostrukturni kompozitni materijali na bazi paukove mreže: dobijanje, strukturna, morfološka, luminescentna i magnetna svojstva materijala
Creator
Dimitrović, Svetlana V.
Copyright date
2019
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
Dozvoljavate samo preuzimanje i distribuciju dela, ako/dok se pravilno naznačava ime autora, bez ikakvih promena dela i bez prava komercijalnog korišćenja dela. Ova licenca je najstroža CC licenca. Osnovni opis Licence: http://creativecommons.org/licenses/by-nc-nd/3.0/rs/deed.sr_LATN. Sadržaj ugovora u celini: http://creativecommons.org/licenses/by-nc-nd/3.0/rs/legalcode.sr-Latn
Language
Serbian
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane: 22.11.2019.
Other responsibilities
mentor
Zarubica, Aleksandra
član komisije
Ranđelović, Marja
član komisije
Žikić, Vladimir
član komisije
Ljupković, Radomir
član komisije
Nikolić, Marko G.
Academic Expertise
Prirodno-matematičke nauke
Academic Title
-
University
Univerzitet u Nišu
Faculty
Prirodno-matematički fakultet
Group
Odsek za hemiju
Alternative title
New nanostructured composite spider silk based materials: preparation, structural, morphological, luminiscent and magnetic properties of the materials
Publisher
[S. V. Dimitrović]
Format
152 str.
description
Biografija: list 147;
Bibliografija: str. 149-151.
description
Applied and Industrial Chemistry
Abstract (en)
Within this doctoral dissertation, spider silk fibers have been chosen as a model system for synthesis new composite materials. The fibers were used as a template for biomineralization, coating with different nanoparticles, as well as template for synthesis pure inorganic fibers.
By imitating biomineralization process, fibers coated with pure and Eu3+ doped cerium(IV)-oxide (CeO2) were obtained. Based on the experimental results obtained by scanning electron microscopy, the optimal concentration of starting material for subsequent europium doping has been determined. Besides complete physico-chemical characterization of the material, luminescent properties of composite material coated with europium doped ceria were investigated.
Similarly, fibers coated with γ-Fe2O3 nanoparticles were obtained by precipitation treatment. Complete physico-chemical, as well as magnetic properties were explored.
By calcination of magnesium salts in the presence of spider silk fibers, fiber-shaped magnesium oxide was obtained, while dimensions of materials were defined with dimensions of natural fibers. By subsequent calcination of MgO fibers, magnesium-hydroxide (Mg(OH)2) was formed, while different obtaining parameters like temperature and incubation period were examined.
Additionally, within dissertation, theoretical calculations of CeO2 system were done in order to estimate its electronic, elastic and mechanical properties in function of pressures in the range 0-100 GPa.
Authors Key words
Vlakna paukove mreže, kalcit, cerijum(IV)-oksid, europijum, maghemit, magnezijum-oksid, magnezijum-hidroksid, biomineralizacija, luminescencija, magnetne osobine
Authors Key words
Spider silk, calcite, cerium(IV)-oxide, europium, maghemite, magnesium-oxide, magnesium-hydroxide, biomineralization, luminescence, magnetic properties
Classification
542.06 : [595.44 + 678-1(043.3)
Subject
Т 150, T 151, T 152, T 153,T 390, T 490
Type
Tekst
Abstract (en)
Within this doctoral dissertation, spider silk fibers have been chosen as a model system for synthesis new composite materials. The fibers were used as a template for biomineralization, coating with different nanoparticles, as well as template for synthesis pure inorganic fibers.
By imitating biomineralization process, fibers coated with pure and Eu3+ doped cerium(IV)-oxide (CeO2) were obtained. Based on the experimental results obtained by scanning electron microscopy, the optimal concentration of starting material for subsequent europium doping has been determined. Besides complete physico-chemical characterization of the material, luminescent properties of composite material coated with europium doped ceria were investigated.
Similarly, fibers coated with γ-Fe2O3 nanoparticles were obtained by precipitation treatment. Complete physico-chemical, as well as magnetic properties were explored.
By calcination of magnesium salts in the presence of spider silk fibers, fiber-shaped magnesium oxide was obtained, while dimensions of materials were defined with dimensions of natural fibers. By subsequent calcination of MgO fibers, magnesium-hydroxide (Mg(OH)2) was formed, while different obtaining parameters like temperature and incubation period were examined.
Additionally, within dissertation, theoretical calculations of CeO2 system were done in order to estimate its electronic, elastic and mechanical properties in function of pressures in the range 0-100 GPa.
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