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Title:Karakterizacija razgradnih produktov poliestrnih vlaken po kemijskem recikliranju
Authors:ID Kuzmič, Katja (Author)
ID Volmajer Valh, Julija (Mentor) More about this mentor... New window
ID Vajnhandl, Simona (Comentor)
Files:.pdf UN_Kuzmic_Katja_2017.pdf (1,86 MB)
MD5: 20C890C6CF4DC49057865CDEA8DB65E7
PID: 20.500.12556/dkum/83ee5672-a849-4b35-81d7-dffa19c5ca37
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:Poliester v kategoriji polimernih materialov zaradi široke uporabnosti zavzema visok delež v svetovni proizvodnji tekstila in plastičnih mas, ki neprestano narašča. Z ekonomskega in okoljevarstvenega vidika je zato potrebno recikliranje. Tekom diplomskega dela smo poliestrna vlakna reciklirali po postopku nevtralne hidrolize v visokotemperaturnem in visokotlačnem reaktorju. Produkte hidrolize smo nato okarakterizirali z metodo infrardeče spektroskopije s Fourierjevo transformacijo in z metodo potenciometričnih titracij v nevodnem mediju z uporabo treh različnih topil (dimetil sulfoksida, kombinacija topil toluena in etanola ter benzil alkohola) z namenom določitve končnih karboksilnih skupin. Na podlagi dobljenih rezultatov smo lahko sklepali o učinkovitosti depolimerizacije pri različnih reakcijskih pogojih. Ugotovili smo, da se poliestrna vlakna najbolje razgradijo pri reakcijskih pogojih 250 °C, masno razmerje vlakna : voda 1:10 in 30 min reakcijskega časa po doseženi željeni temperaturi in tlaku. Dimetil sulfoksid se je izkazal za najustreznejše topilo za določitev končnih karboksilnih skupin s potenciometrično titracijo produktov v obliki prahu, benzil alkohol pa za produkte v obliki vlaken.
Keywords:poliester, recikliranje, hidroliza, titracije, FTIR
Place of publishing:Maribor
Publisher:[K. Kuzmič]
Year of publishing:2017
PID:20.500.12556/DKUM-67449 New window
UDC:677.494.674.017(043.2)
COBISS.SI-ID:21110550 New window
NUK URN:URN:SI:UM:DK:409W1P9U
Publication date in DKUM:08.09.2017
Views:2155
Downloads:238
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:18.08.2017

Secondary language

Language:English
Title:Characterization of polyester fibers degradation products after chemical recycling
Abstract:Polyester in category of polymer materials holds a major share in global production of textiles and plastics that is growing constantly. From economic and environmental aspect, recycling is essential for this matter. During diploma work, polyester fibres were recycled by using neutral hydrolysis process in high-temperature and high-pressure reactor. Products of hydrolysis were characterised using Fourier transform infrared (FTIR) spectroscopy and potentiometric titrations in non-aqueous solutions. Three different solvents were used: dimethyl sulfoxide (DMSO), combination of toluene and ethanol, and benzyl alcohol, with the aim to determinate number of available carboxyl end-groups. Based on the results, conclusions were made on the depolymerisation efficiency under different reaction conditions. We established that the most successful fibre degradation rate was by reaction conditions of 250°C, mass ratio of fibre and water 1:10 and 30 minute reaction time after reaching desired temperature and pressure conditions. Dimethyl sulfoxide (DMSO) turned out to be the most suitable solvent for determination of available carboxyl end-groups by potentiometric titrations of powder-form products and benzyl alcohol for titrations of fibre-form products.
Keywords:polyester, recycling, hydrolysis, titrations, FTIR


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