diplomsko delo
Helena Potočnik (Author), Rok Ambrožič (Mentor)

Abstract

Znanost od konca 20. stoletja stremi k zmanjšanju škodljivih vplivov na okolje in uporabi okolju bolj prijaznih kemikalij, s čimer bi zagotovili trajnostni razvoj industrije in družbe. V ta namen se je razvila tako imenovana zelena kemija, katere cilj je zadovoljiti trenutne potrebe sodobne družbe tako, da pri tem ne ogrozimo zadovoljevanja potreb prihodnjih generacij. V zadnjem času so zato v središču zanimanja evtektična topila, ki lahko v določenih primerih zamenjajo klasična topila; globoka evtektična topila (angl. deep eutectic solvents, DESs) so okolju prijaznejša, stabilna in dobro električno prevodna topila, ki se lahko uporabljajo za različne namene in lahko med drugim nadomestijo uporabo ionskih tekočin v vlogi gelskih elektrolitov. V sklopu diplomske naloge je bil raziskan vpliv dodatka DES med procesom geliranja na pripravo alginatnega hidrogela. Ugotovila sem, da lahko z dodatkom DES in s spreminjanjem pH vrednosti vplivamo na velikost polimerne mreže – s čimer vplivamo tudi na difuzivnost, prepustnost itd. –, in sicer večji, kot je delež dodanega DES ter pH vrednost, večja je velikost polimerne mreže in posledično prepustnost hidrogelov.

Keywords

hidrogeli;globoka evtektična topila;zelena kemija;velikost polimerne mreže;gostota premreženja;diplomska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [H. Potočnik]
UDC: 678(043.2)
COBISS: 171623683 Link will open in a new window
Views: 74
Downloads: 4
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Other data

Secondary language: English
Secondary title: Effect of pH on the properties of hydrogels prepared with eutectic solvents
Secondary abstract: Since the end of the 20th century science has been striving to reduce environmental damage and use more environmentally friendly chemicals, thereby ensuring sustainable development of both industry and society. To this end, so-called green chemistry has been developed with a goal to satisfy current needs without compromising the needs of future generations. Eutectic solvents have been in the focus of interest recently because they can replace classical solvents in certain cases. Deep eutectic solvents (DESs) are environmentally friendly, stable and electrically conductive solvents that can be used for various purposes, including as an alternative to ionic liquids as gel electrolytes. As part of the thesis, the effect of the addition of DES during the gelation process on the preparation of alginate hydrogel had been investigated. It was determined that the addition of DES and changing the pH value can affect mesh size and consequently also diffusivity, permeability, etc. Mesh size and therefore permeability of hydrogels increases if DES are added or pH increased.
Secondary keywords: hydrogels;deep eutectic solvents;green chemistry;mesh size;crosslinking density;Polimeri;Univerzitetna in visokošolska dela;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000372
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, UNI Kemijsko inženirstvo
Pages: 54 str.
ID: 19912995