diplomsko delo
Nika Hribernik (Author), Rok Ambrožič (Mentor)

Abstract

Hidrogeli, tridimenzionalni zamreženi polimeri, so v zadnjih časih močno preučevana tema. Hitozan je eden najbolj uporabljenih polisaharidov za pripravo hidrogelov, saj ima veliko lastnosti, ki jih želimo imeti tudi pri našem hidrogelu. Ena od možnosti za tvorjenje hidrogelov na podlagi hitozana je tudi elektrodepozicija, tehnika, pri kateri z induciranjem električne napetosti sprožimo zamreževanje na elektrodah. Poznamo več vrst elektrodepozicije, pri katerih se hidrogel tvori ali na anodi ali na katodi. Hitozan je hidrogele zmožen tvoriti na obeh, vendar so hidrogeli pridobljeni na anodi veliko bolj homogeni in obstojni. Sama sem poskušala tvoriti hidrogele s pripravo dveh različnih raztopin, eno z ocetno kislino in eno z klorovodikovo kislino. Pri vsaki raztopini sem spreminjala pogoje, kot so čas elektrodepozicije, gostota električnega toka ter material uporabljenih elektrod, nato pa sem preučevala kako te spremembe vplivajo na debelino in strukturo nastalih gelov. Na koncu sem v vsako raztopino dodala tudi dodatek soli ter preučevala kako le-ta vpliva na tvorjenje hidrogelov.

Keywords

hidrogeli;hitozan;elektrodepozicija;zamreževanje;soli;diplomska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [N. Hribernik]
UDC: 621.357:678.4(043.2)
COBISS: 169841155 Link will open in a new window
Views: 43
Downloads: 1
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Other data

Secondary language: English
Secondary title: Effect of formulation and electrode type on chitosan electrodeposition
Secondary abstract: Hydrogels, three-dimensional cross-linked polymers, have been the subject of intense research in recent times. Chitosan is one of the most widely used polysaccharides for the preparation of hydrogels, as it has many of the properties we wish in our hydrogel. One possibility for the formation of chitosan-based hydrogels is also electrodeposition, a technique in which cross-linking is initiated at the electrodes by inducing an electric voltage. Several types of electrodepositions are known in which the hydrogel is formed either at the anode or at the cathode. Chitosan is able to form hydrogels on both, but the hydrogels obtained on the anode are much more homogeneous and stable. I tried to make hydrogels myself by preparing two different solutions, one with acetic acid and one with hydrochloric acid. With each solution, I varied the conditions, such as the electrodeposition time, the electric current density, and the material of the electrodes used, and then I studied how these changes affected the thickness and structure of the resulting hydrogels. Finally, I also added salt to each solution and studied its effect on the formation of hydrogels.
Secondary keywords: hydrogels;electrodeposition;chitosan;salt;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: 32 str.
ID: 19909025