Utjecaj atmosferilija na biorazgradivost i vlačna svojstva tekstilija

master's thesis

• Title (english): Influence of Weathering conditions on Biodegradability and Tensile Properties of Textile
• Author: Mihael Jelečević
• Mentor: Ružica Brunšek (mentor)
• Committee member: Sanja Ercegović Ražić (predsjednik povjerenstva)
• Committee member: Ružica Brunšek (član povjerenstva)
• Committee member: Dragana Kopitar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Textile Technology; (Department of Materials, Fibres and Textile Testing); Zagreb
• Defense date and country: 2019-08-29, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Textile Technology; Textile Chemistry

Abstract

Biorazgradnja je kemijska razgradnja polimera izazvana djelovanjem
mikroorganizama kao što su bakterije, gljivice i alge. Polimeri se u ekosustavima
razgrađuju reakcijama oksidacije i hidrolize te se razgrađuju u biomasu, ugljikov dioksid,
plin metan te ostatak. Prilikom razgradnje polimera dolazi do promjene njegovih početnih
svojstava kao što su vlačna čvrstoća, masa, boja, oblik itd. Takve promjene nazivamo
''starenje'' (engl. ageing) i to je nepoželjna pojava ukoliko se ne radi o biorazgradivim
materijalima. U ovom radu ispitivana je biorazgradivost različitih tkanih i netkanih plošnih
proizvoda izrađenih od prirodnih vlakana, sintetičkih polimera te folija. Uzorci su
zakopani u zemlju te tako izloženi vanjskim vremenskim utjecajima u vremenskim
periodima od 12 i 24 dana. Nakon prolaska određenog vremenskog perioda obrade,
uzorcima su ispitivane površinske mase, debljina uzoraka, vlačna čvrstoća, prekidno
istezanje te su vizualno promatrane morfološke promjene na površini uzoraka te
uspoređivane s nultim uzorcima. Nakon prikupljanja i analiziranja podataka vidljivo je
kako su svim uzorcima svojstva koja ukazuju na razgradnju bila smanjena, odnosno da
su bili izvrgnuti djelovanju mikroorganizama.

Abstract (english)

Biodegradation is the chemical degradation of polymers caused by the action
of microorganisms such as bacteria, fungi and algae. Polymers are degraded in
ecosystems by oxidation and hydrolysis reactions and decomposed into biomass,
carbon dioxide, methane gas and the residue. During the decomposition of a polymer,
its initial properties such as tensile strength, mass, color, shape, etc. are altered. Such
changes are called „aging“ and this is an undesirable phenomenon if it is not a
biodegradable material. This paper examines the biodegradability of various woven and
non-woven sheet products made from natural fibers, synthetic polymers and foil. The
samples were buried in the ground and thus exposed to external weather in periods of
12 and 24 days. After a certain period of time, the samples were examined for surface
mass, thickness of the specimens, tensile strength, breaking elongation, and
morphological changes were observed on the surface of the specimens and compared
with the null specimens. After collecting and analyzing the data, it can be seen that all
the samples showed degradation properties, ie they were exposed to microorganisms.

• Keywords: biorazgradivost; atmosferilije; vlačna svojstva; površinska masa; debljina materijala i morfologija površine materijala
• Keywords (english): biodegradability; weathering conditions; tensile properties; surface mass; material thickness and surface morphology of the material
• Language: croatian
• URN:NBN: urn:nbn:hr:201:093369
• Study programme: Title: Textile Technology and Engineering; specializations in: Clothing Engineering, Textile Design and Management, Industrial Textile Design, Industrial Clothing Design, Textile Chemistry, Materials and Ecology; Course: Textile Chemistry, Materials and Ecology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka tekstilne tehnologije i inženjerstva (magistar/magistra inženjer/inženjerka tekstilne tehnologije i inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-09-20 09:14:23