prikaz prve stranice dokumenta Celulozni hidrogelovi
  Download
PDF 1.7 MB
undergraduate thesis
Celulozni hidrogelovi
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. urn:nbn:hr:149:486385
Mihalak, Ivan Antonio
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

Mihalak, I. A. (2018). Celulozni hidrogelovi (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:486385

Mihalak, Ivan Antonio. "Celulozni hidrogelovi." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:486385

Mihalak, Ivan Antonio. "Celulozni hidrogelovi." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2018. https://urn.nsk.hr/urn:nbn:hr:149:486385

Mihalak, I. A. (2018). 'Celulozni hidrogelovi', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 26 December 2024, https://urn.nsk.hr/urn:nbn:hr:149:486385

Mihalak IA. Celulozni hidrogelovi [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2018 [cited 2024 December 26] Available at: https://urn.nsk.hr/urn:nbn:hr:149:486385

I. A. Mihalak, "Celulozni hidrogelovi", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:149:486385

Metadata
TitleCelulozni hidrogelovi
Title (english)Cellulose hydrogels
AuthorIvan Antonio Mihalak
MentorElvira Vidović (mentor)
Committee memberElvira Vidović (predsjednik povjerenstva)
Committee memberAna Lončarić Božić (član povjerenstva)
Committee memberFabio Faraguna (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2018-09-17, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Chemical Engineering in Material Development
Abstract
U ovom radu istraživala su se svojstva celuloznih hidrogelova dobivenih iz mikrokristalične celuloze. Hidrogelovi su trodimenzionalne polimerne mreže nabubrene s velikom količinom vode, a mogu se pripraviti fizikalnim ili kemijskim umreživanjem. Otapanje mikrokristalične celuloze provedeno je u vodenoj otopini NaOH/urea. Pripremljene su otopine s masenim udjelom celuloze od 1, 3, 5 i 7 mas.%. Metoda umreživanja celuloze bila je fizikalna što znači da se među molekulama celuloze stvaraju intramolekularne vodikove veze. Bilo je potrebno utvrditi koji maseni postotak celuloze u otopini daje optimalnu poroznost celuloznog hidrogela. Poroznost je vrlo bitno svojstvo hidrogelova pošto ona određuje kapacitet kapljevine koju hidrogel može primiti. Priređeni hidrogelovi karakterizirani su infracrvenom spektroskopijom (FTIR), pretražnom elektronskom mikroskopijom (SEM), rendgenskom difrakcijom (XRD) te bubrenjem. Ustanovljeno je da hidrogel dobiven iz 3%-tne otopine celuloze metodom pretaloživanja ima najviši kapacitet bubrenja što se očitava u najvišim vrijednostima stupnja bubrenja.
Abstract (english)
This work investigates properties of cellulose hydrogels made from microcrystalline cellulose. Hydrogels are three-dimensional polymer networks swollen with water which can be synthetized either by chemical or physical crosslinking. Microcrystalline cellulose was disolved in aqueous sloution of NaOH/urea. Solutions with 1, 3, 5 and 7 mass percentages of cellulose were obitained. It was necessary to determine which mass percentage of cellulose in the solution will give the optimal porosity of the cellulose hydrogel. Porosity is a very important feature of hydrogels as it determines the capacity of solvent that the hydrogel can absorb. Prepared hydrogels were characterized by infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD) and swelling method. It has been found that the hydrogel obtained from 3 mass.% cellulose solution which was prepared by precipitation method has the highest swelling degree.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:486385
Study programmeTitle: Chemical Engineering - Undergraduate study
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-05-17 11:20:41