prikaz prve stranice dokumenta Poly(ethyleneimine)/poly/(sodium 4-styrenesulfonate) complexes: characterization and applications as membranes
Embargo period 2025-12-19
master's thesis
Poly(ethyleneimine)/poly/(sodium 4-styrenesulfonate) complexes: characterization and applications as membranes
Zagreb: University of Zagreb, Faculty of Science, 2023. urn:nbn:hr:217:784358
Jurković, Mia
University of Zagreb
Faculty of Science
Department of Chemistry

Institutional repository: Repository of the Faculty of Science

Cite this document

Jurković, M. (2023). Poly(ethyleneimine)/poly/(sodium 4-styrenesulfonate) complexes: characterization and applications as membranes (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:784358

Jurković, Mia. "Poly(ethyleneimine)/poly/(sodium 4-styrenesulfonate) complexes: characterization and applications as membranes." Master's thesis, University of Zagreb, Faculty of Science, 2023. https://urn.nsk.hr/urn:nbn:hr:217:784358

Jurković, Mia. "Poly(ethyleneimine)/poly/(sodium 4-styrenesulfonate) complexes: characterization and applications as membranes." Master's thesis, University of Zagreb, Faculty of Science, 2023. https://urn.nsk.hr/urn:nbn:hr:217:784358

Jurković, M. (2023). 'Poly(ethyleneimine)/poly/(sodium 4-styrenesulfonate) complexes: characterization and applications as membranes', Master's thesis, University of Zagreb, Faculty of Science, accessed 25 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:784358

Jurković M. Poly(ethyleneimine)/poly/(sodium 4-styrenesulfonate) complexes: characterization and applications as membranes [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2023 [cited 2024 November 25] Available at: https://urn.nsk.hr/urn:nbn:hr:217:784358

M. Jurković, "Poly(ethyleneimine)/poly/(sodium 4-styrenesulfonate) complexes: characterization and applications as membranes", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:217:784358

Metadata
TitlePoly(ethyleneimine)/poly/(sodium 4-styrenesulfonate) complexes: characterization and applications as membranes
Title (croatian)Kompleksi poli(etilenimina) i poli(natrijevog 4-stirensulfonata): karakterizacija i primjena kao membrane
AuthorMia Jurković
MentorDavor Kovačević (mentor)
MentorSaskia Lindhoud (mentor)
Committee memberDavor Kovačević (predsjednik povjerenstva)
Committee memberSaskia Lindhoud (član povjerenstva)
Committee memberĐani Škalamera (član povjerenstva)
Committee memberIvana Kekez (član povjerenstva)
Committee memberBranimir Bertoša (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Chemistry)
Zagreb
Defense date and country2023-12-19, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
Polyelectrolyte complex formation was studied on the example of the complexation between branched poly(ethyleneimine) and poly(sodium 4-styrenesulfonate). Casting solutions containing these polyelectrolytes were examined using dynamic light scattering measurements. Polyelectrolyte complex membranes were successfully prepared from casting solutions using the aqueous phase separation method. The top surface and cross-section morphology of the membranes was analysed by scanning electron microscopy. Membranes exhibited asymmetric morphology with dense top layers, followed by porous substructures. Pure water permeability tests offered insights into membranes’ porosity and substructure. By adding lysozyme in casting solution, biocatalytic membrane was created. Lysozyme- containing membrane showed enzymatic activity upon increasing the temperature. Polyelectrolyte complexation was studied at the surface, as well. Compact polyelectrolyte multilayers were prepared on silicon wafer using layer-by-layer method and characterized using ellipsometry and atomic force microscopy. Based on the obtained results, it could be concluded that poly(ethyleneimine)/poly(sodium 4-styrenesulfonate) complexes were found to be promising candidates for application as membranes.
Abstract (croatian)
Nastajanje polielektrolitnih kompleksa proučavano je na primjeru kompleksiranja razgranatog poli(etilenimina) i poli(natrijevog 4-stirensulfonata). Vodene otopine polielektrolita analizirane su dinamičkim raspršenjem svjetlosti. Membrane na bazi polielektrolitnih kompleksa uspješno su priređene iz spomenutih otopina polielektrolita uporabom metode vodene fazne separacije. Morfologija membrana definirana je analizom površine i središnjeg presjeka, metodom pretražne elektronske mikroskopije. Ustanovljeno je kako sve membrane posjeduju asimetričnu morfologiju s gustim površinskim slojem popraćenim poroznom podstrukturom. Ispitivanje permeabilnosti za čistu vodu pružilo je informacije o poroznosti i podstrukturi membrana. Dodatak otopine lizozima rezultirao je formiranjem biokatalitičke membrane čija je enzimska aktivnost opažena uslijed povišenja temperature. Kompleksiranje polielektrolita istraženo je i na površini. Kompaktni polielektrolitni višeslojevi pripravljeni su na silicijevom supstratu metodom sloj-po-sloj, a karakterizacija je provedena upotrebom elipsometrije i mikroskopije atomskih sila. Na temelju dobivenih rezultata može se zaključiti kako su kompleksi poli(etilenimina) i poli(natrijevog 4-stirensulfonata) obećavajući kandidati za primjenu kao membrane.
Keywords
Keywords (croatian)
Languageenglish
URN:NBNurn:nbn:hr:217:784358
ProjectNumber: IPS-2020-01-6126
Title: Modulacija polifenolnog profila voća uslijed fizikalnih tretmana nakon branja
Title: Modulation of fruit polyphenolic profile by sustainable postharvest physical treatments
Leader: Davor Kovačević
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: IPS
Study programmeTitle: Graduate university studies in chemistry; specializations in: Graduate university studies in chemistry
Course: Graduate university studies in chemistry
Study programme type: university
Study level: graduate
Academic / professional title: sveučilišni/a magistar/magistra kemije (sveučilišni/a magistar/magistra kemije)
Type of resourceText
File originBorn digital
Access conditionsEmbargoed access
Embargo expiration date: 2025-12-19
Terms of useLicence In copyright icon
Created on2024-01-16 13:37:24