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master's thesis
Priprema i karakterizacija hidrogelova na bazi poli(vinil-alkohola)
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. urn:nbn:hr:149:464116
Jakus, Damir
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

Cite this document

Jakus, D. (2021). Priprema i karakterizacija hidrogelova na bazi poli(vinil-alkohola) (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:464116

Jakus, Damir. "Priprema i karakterizacija hidrogelova na bazi poli(vinil-alkohola)." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:149:464116

Jakus, Damir. "Priprema i karakterizacija hidrogelova na bazi poli(vinil-alkohola)." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:149:464116

Jakus, D. (2021). 'Priprema i karakterizacija hidrogelova na bazi poli(vinil-alkohola)', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 19 May 2024, https://urn.nsk.hr/urn:nbn:hr:149:464116

Jakus D. Priprema i karakterizacija hidrogelova na bazi poli(vinil-alkohola) [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2021 [cited 2024 May 19] Available at: https://urn.nsk.hr/urn:nbn:hr:149:464116

D. Jakus, "Priprema i karakterizacija hidrogelova na bazi poli(vinil-alkohola)", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:149:464116

Metadata
TitlePriprema i karakterizacija hidrogelova na bazi poli(vinil-alkohola)
Title (english)Preparation and characterization of poly(vinyl-alcohol) hydrogels
AuthorDamir Jakus
MentorLjerka Kratofil Krehula (mentor)
Committee memberLjerka Kratofil Krehula (predsjednik povjerenstva)
Committee memberHelena Otmačić Ćurković (član povjerenstva)
Committee memberMirela Leskovac (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2021-07-15, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
U ovom je radu provedena sinteza i karakterizacija hidrogelova na temelju poli(vinilalkohola) (PVA) uz dodatak natrijeva alginata (SA) kao sredstva za poboljšanje geliranja i stabilizacije sustava. Navedeni polimeri otopljeni su u razrijeđenoj otopini limunske kiseline i natrijevog hidroksida ili u priređenoj otopini umjetne kiše te uz dodatak određenog volumnog udjela glicerola pri pripremi nekih uzoraka. Hidrogelovi su sintetizirani fizičkom metodom umreživanja, zamrzavanjem i odmrzavanjem pripremljene otopine u 6 ciklusa. Pripremljene otopine i uzorci hidrogelova karakterizirani su FTIR spektroskopijom. Hidrogelovi su podvrgnuti i termogravimetrijskoj analizi (TGA) zbog uvida u njihovu toplinsku stabilnost. Također je kod hidrogelova određen udio vode metodom sušenja u sušioniku i stupanj ravnotežnog bubrenja u vodi. Kako bi se utvrdila vodljivost, odnosno primjenjivost hidrogelova u daljnjim elektrokemijskim ispitivanjima, kod hidrogelova je određena otpornost elektrokemijskom impedancijskom spektroskopijom (EIS) prije i nakon bubrenja u vodi. Navedenim je metodama ispitan i utjecaj glicerola na svojstva hidrogelova.
Abstract (english)
In this thesis, the synthesis and characterization of poly(vinyl-alcohol) based hydrogels (PVA) with the addition of sodium alginate (SA) as a medium to improve gelling and system stabilization was performed. Above mentioned polymers are dissolved in a dilute solution of citric acid and sodium hydroxide or in a prepared solution of artificial rain and with the addition of a certain volume fraction of glycerol in the preparation of some samples. The hydrogels were synthesized by the physical method of crosslinking, freezing and thawing the prepared solution in 6 cycles. The prepared solutions and samples of hydrogels were characterized by FTIR spectroscopy. Hydrogels were also subjected to thermogravimetric analysis (TGA) to gain insight into their thermal stability. Also, in the case of hydrogels, the proportion of water by the method of drying in the dryer and the degree of equilibrium swelling in water were determined. In order to determine the conductivity and applicability of hydrogels in further electrochemical tests, the resistance of hydrogels was determined by electrochemical impedance spectroscopy (EIS) before and after swelling in water. The influence of glycerol on the properties of hydrogels was also tested by these methods.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:464116
ProjectNumber: IP-2019-04-5030
Title: Razvoj novih rješenja za karakterizaciju i zaštitu brončane kulturne baštine izložene vanjskom okolišu
Title: Development of New Solutions for Characterization and Protection of Bronze Cultural Heritage Exposed to Outdoor Environment
Acronym: BroCH
Leader: Helena Otmačić Ćurković
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: IP
Study programmeTitle: Chemical Engineering - Graduate study
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
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Created on2023-04-11 08:12:10