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undergraduate thesis
Svojstva i primjena prirodnih adheziva
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. urn:nbn:hr:149:389681
Milardović, Irena
University of Zagreb
Faculty of Chemical Engineering and Technology

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

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Milardović, I. (2020). Svojstva i primjena prirodnih adheziva (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:389681

Milardović, Irena. "Svojstva i primjena prirodnih adheziva." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:149:389681

Milardović, Irena. "Svojstva i primjena prirodnih adheziva." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:149:389681

Milardović, I. (2020). 'Svojstva i primjena prirodnih adheziva', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 14 January 2025, https://urn.nsk.hr/urn:nbn:hr:149:389681

Milardović I. Svojstva i primjena prirodnih adheziva [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2020 [cited 2025 January 14] Available at: https://urn.nsk.hr/urn:nbn:hr:149:389681

I. Milardović, "Svojstva i primjena prirodnih adheziva", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:149:389681

Metadata
TitleSvojstva i primjena prirodnih adheziva
Title (english)Properties and application of natural adhesives
AuthorIrena Milardović
MentorMirela Leskovac (mentor)
MentorZrinka Buhin Šturlić (komentor)
Committee memberMirela Leskovac (predsjednik povjerenstva)
Committee memberZrinka Buhin Šturlić (član povjerenstva)
Committee memberMarijana Kraljić Roković (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2020-09-14, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Pojam adheziva poznat je još od davnina, a upravo su prvi primjenjivi adhezivi bili prirodnog podrijetla, podrazumijevajući sve adhezive na biljnoj i životinjskoj bazi te prirodne gume. Njihova pristupačna cijena i dobra kvaliteta i danas omogućuje široku primjenu, ponajviše u drvnoj i prehrambenoj industriji gdje se najviše cijeni njihovo prirodno podrijetlo. U ovome je radu dan pregled prirodnih adheziva biljnog i životinjskog podrijetla te su ispitana svojstva četiri vrste prirodnih adheziva. Šelak i goveđe tutkalo adhezivi su životinjskog podrijetla a svoju primjenu nalaze u drvnoj industriji i proizvodnji papira, dok su karnauba vosak i guma arabica adhezivi biljnog podrijetla, a svoju primjenu nalaze u prehrambenoj i farmaceutskoj industriji kao zgušnjivači i emulgatori. Na uzorcima prirodnih adheziva provedena su ispitivanja topljivosti u različitim otapalima te su ispitana površinska svojstva mjerenjem kontaktnog kuta na filmovima dobivenim iz otopine adheziva. Strukturna svojstva adheziva ispitana su primjenom FTIR-ATR spektroskopije, a toplinska svojstva primjenom diferencijalne pretražne kalorimetrije (DSC) i termogravimetrijske analize (TGA). Ispitivanja su pokazala značajne razlike između životinjskih i biljnih adheziva. DSC tehnikom utvrđeno je da su goveđe tutkalo i karnauba vosak semikristalne strukture, dok su šelak i guma arabica amorfne strukture. TGA analizom utvrđeno je da se karnauba vosak razgrađuje u jednom stupnju, dok se šelak, goveđe tutkalo i guma arabica razgrađuju u dva ili više stupnja.
Abstract (english)
The term of adhesive has been known since ancient times and the first applicable adhesives were of natural origin, including all plant and animal-based adhesives and natural rubbers. Their affordable price and good quality still enable wide application, especially in wood and food industry where the most valuable worth is their natural origin. In this paper, an overview of natural adhesives of plant and animal origin is given, and the properties of four types of natural adhesives are examined. Shellac and bone glue are animal-based adhesives which are used in wood and paper industries, while carnauba wax and gum arabic are plant-based adhesives which are used in food and pharmaceutical industries as thickeners and emulsifiers. Solubility tests in different solvents were performed on samples of natural adhesives, and surface properties were examined by measuring the contact angle on films obtained from the adhesive solution. The structural properties were examined by using FTIR-ATR spectroscopy, and thermal properties by using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results have shown significant differences between animal and plant-based adhesives. The DSC method determined that bone glue and carnauba wax have semicrystalline structure, while shellac and gum arabic have amorphous structure. TGA analysis found that carnauba wax decomposes in one stage, while shellac, bone glue and gum arabic decompose in two or more stages.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:389681
Study programmeTitle: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Advanced materials and technologies
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2023-05-08 08:01:13