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undergraduate thesis
Utjecaj adheziva na svojstva papira
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. urn:nbn:hr:149:502035
Šadura, Iva
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

Šadura, I. (2020). Utjecaj adheziva na svojstva papira (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:502035

Šadura, Iva. "Utjecaj adheziva na svojstva papira." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:149:502035

Šadura, Iva. "Utjecaj adheziva na svojstva papira." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:149:502035

Šadura, I. (2020). 'Utjecaj adheziva na svojstva papira', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 26 January 2025, https://urn.nsk.hr/urn:nbn:hr:149:502035

Šadura I. Utjecaj adheziva na svojstva papira [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2020 [cited 2025 January 26] Available at: https://urn.nsk.hr/urn:nbn:hr:149:502035

I. Šadura, "Utjecaj adheziva na svojstva papira", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:149:502035

Metadata
TitleUtjecaj adheziva na svojstva papira
Title (english)The influence of adhesives on paper properties
AuthorIva Šadura
MentorMirela Leskovac (mentor)
MentorZrinka Buhin Šturlić (komentor)
Committee memberMirela Leskovac (predsjednik povjerenstva)
Committee memberZrinka Buhin Šturlić (član povjerenstva)
Committee memberIva Movre Šapić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2020-09-24, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
U procesu proizvodnje papira adhezivi su neizostavna pomoćna sredstva koja se dodaju u papirnu suspenziju ili se površinski nanose u obliku premaza. S obzirom na namjenu papirnih proizvoda njihova svojstva variraju te se premazivanje papira adhezivima vrši u svrhu poboljšanja željenih svojstava. U papirnoj industriji često se upotrebljavaju bioadhezivi dobiveni iz biljnih ili životinjskih izvora zbog ekološke prihvatljivosti i dostupnosti. U ovom radu korišteni su bioadhezivi: klucel (hidroksipropil celuloza), metil celuloza, rižin škrob i šelak. Toplinska svojstva bioadheziva ispitana su tehnikom diferencijalne pretražne kalorimetrije (DSC) i termogravimetrijskom analizom (TGA). Mehanička svojstva filter papira premazanih otopinama adheziva karakterizirana su vlačnim ispitivanjem na mehaničkoj kidalici, a površinska svojstva filter papira s premazom prirodnog adheziva mjerenjem kontaktnog kuta s testnom kapljevinom vodom. Termogravimetrijskom analizom utvrđeno je da se toplinska razgradnja klucela odvija u jednom stupnju, dok se metil celuloza, rižin škrob i šelak razgrađuju u dva stupnja. Iz rezultata analize diferencijalne pretražne kalorimetrije zaključeno je da su svi ispitivani prirodni adhezivi amorfne strukture. Postoje značajne razlike 1. i 2. ciklusa zagrijavanja, u ciklusu zagrijavanja metil celuloza i šelaka dolazi do staklastih prijelaza, a klucel, metil celuloza i rižin škrob pokazuju endotermne prijelaze u širokom temperaturnom području. Na temelju rezultata zaključeno je kako premazivanje filter papira bioadhezivima utječe na promjenu mehaničkih i površinskih svojstava. Upojnost vode filter papira se smanjuje premazom otopinama klucela, metil celuloze, rižinog škroba i šelaka.
Abstract (english)
In the process of paper production, adhesives are indispensable auxiliaries that are added to the paper suspension or applied to the surface in the form of a coating. Given the purpose of paper products, their properties vary and therefore the coating of the paper with adhesives is applied with the aim to improve the desired properties. Bioadhesives obtained from plants ar animal sources are often used in the paper industry due to their environmental friendliness and availability. Bioadhesives that were used in this research are: klucel (hydroxypropyl cellulose), methyl cellulose, rice starch and shellac. The thermal properties of bioadhesives were examined by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of adhesive coated paper were characterized by tensile testing on a mechanical testing machine, and the surface properties by measuring the contact angle with water as a test liquid. Thermogravimetric analysis showed that the thermal decomposition of klucel takes place in one stage, while methyl cellulose, rice starch and shellac are decomposed in two stages. From the results of differential scanning calorimetry, it was concluded all adhesives are amorphous. Significant differences in the 1. and 2. heating cycles are visible, methyl cellulose and shellac showe glass transition, klucel, methyl cellulose and rice starch show endothermic transitions in a wide temperature range. Based on the results, it was concluded that coating of bioadhesives on the filter paper changed its mechanical and surface properties. The water absorbency of the filter paper is reduced by coating the paper with klucel, methyl cellulose, rice starch and shellac.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:502035
Study programmeTitle: Materials Science and 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 conditionsAccess restricted to students and staff of home institution
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Created on2023-05-08 16:05:42