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Title:Izolacija mikro in nanoceluloze iz rastlinskih materialov
Authors:ID Dokl, Monika (Author)
ID Leitgeb, Maja (Mentor) More about this mentor... New window
ID Vasić, Katja (Comentor)
Files:.pdf UN_Dokl_Monika_2018.pdf (4,10 MB)
MD5: 37E3791CB195A3BA2CA4EB116F0E00C4
PID: 20.500.12556/dkum/0fa2b073-6ca5-4824-8e6f-edc5baf5b03a
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Nanoceluloza s časom pridobiva vse več pozornosti, saj velja za material z dobrimi mehanskimi in termičnimi lastnostmi. Uporablja se v številnih aplikacijah, kjer se dodaja k drugim materialom in tako izboljša njihove lastnosti. Zaradi razširjenosti, nizke cene in odličnih lastnosti lahko nanocelulozo proizvajamo trajnostno in obnovljivo. V diplomskem delu smo iz praproti Polypodiopsida celulozo izolirali na tri različne načine. Vsi postopki so zajemali začetno mehansko obdelavo in kasnejšo kemijsko obdelavo. Kemijski postopki so vsebovali alkalno in kislinsko obdelavo, obdelavo z vodikovim peroksidom in obdelavo z žveplovo (VI) kislino. Spreminjali smo časovna obdobja naštetih obdelav. Vzorci so bili analizirani s Fourierjevo transformacijsko infrardečo spektroskopijo (FTIR), termogravimetrično analizo (TGA), diferenčno dinamično kalorimetrijo (DSC), dinamičnim sipanjem svetlobe (DLS), vrstičnim elektronskim mikroskopom (SEM) in energijsko disperzijsko spektrometrijo (EDS). S FTIR analizo smo potrdili prisotnost celuloze, hemiceluloze in lignina, z EDS analizo pa vsebnost ogljika in kisika. S TGA in DSC smo daljšo alkalno obdelavo označili za najuspešnejšo pri zagotavljanju termične stabilnosti. S SEM in DLS metodo smo postopek, ki je vseboval daljšo obdelavo z vodikovim peroksidom, označili za najuspešnejšega, saj smo v tem primeru dobili nanocelulozo.
Keywords:celuloza, nanoceluloza, mikroceluloza, izolacija, rastlinski material
Place of publishing:Maribor
Publisher:[M. Dokl]
Year of publishing:2018
PID:20.500.12556/DKUM-71797 New window
UDC:547.458.8(043.2)
COBISS.SI-ID:21967894 New window
NUK URN:URN:SI:UM:DK:GCO4RWS6
Publication date in DKUM:05.10.2018
Views:1974
Downloads:188
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:30.08.2018

Secondary language

Language:English
Title:Isolation micro and nanocellulose from plant materials
Abstract:Nanocellulose is gaining more and more attention over time as it is a material with good mechanical and thermal properties. It is used in many applications where it is added to other materials to improve their properties. Because it is commonly spread and has low price and unique properties, nanocellulose can be manufactured sustainably and is renewable. In this diploma paper, cellulose was isolated from Polypodiopsida fern in three different procedures. All procedures included initial mechanical processing and subsequent chemical treatment. Chemical processes were alkali and acid treatment, bleaching and treatment with sulfuric acid (VI). Within optimization, time periods of the listed treatment were changed. Samples were analyzed using Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Dynamic Light Scattering (DLS), Scanning Electron Microscope (SEM) and Energy Dispersive Spectroscopy (EDS). The FTIR analysis confirmed the presence of cellulose, hemicellulose and lignin, and EDS analysis confirmed content of carbon and oxygen. With TGA and DSC analysis we have confirmed that longer alkali treatment is the most successful in providing thermal stability. With SEM and EDS analysis, the process, which included longer bleaching, was considered to be the most successful, because in this case nanocellulose was obtained.
Keywords:cellulose, nanocellulose, microcellulose, isolation, plant material


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