Biorazgradivost stabljičnih vlakana i biopolimera za agrotekstilnu namjenu

master's thesis

• Author: Anica Mioč
• Mentor: Ružica Brunšek (mentor)
• Committee member: Dragana Kopitar (predsjednik povjerenstva)
• Committee member: Ružica Brunšek (član povjerenstva)
• Committee member: Maja Somogyi Škoc (član povjerenstva)
• Committee member: Ivana Schwarz (član povjerenstva)
• Granter: University of Zagreb; Faculty of Textile Technology; Zagreb
• Defense date and country: 2024-02-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Textile Technology; Textile Chemistry

Abstract

Biorazgradnja, to jest biotička razgradnja polimera je kemijska razgradnja materijala izazvana djelovanjem mikroorganizama kao što su gljivice, bakterije i alge. Postupak biorazgradnje se temelji na aktivnosti živih organizama, a sam produkt se dobije razgradnjom njihovog djelovanja. Prirodni polimeri kao što su proteini, polisaharidi i nukleinske kiseline se razgrađuju reakcijama oksidacije i hidrolize. Biorazgradivi materijal razgrađuje se u biomasu, ugljikov dioksid i plin metan. U ovom radu ispitivana je biorazgradnja stabljičnih vlakana (konoplja, juta) i biopolimera (PLA) za agrotekstilnu namjenu. Da bi se ispitalo svojstvo biorazgradnje, stabljična vlakna i biopolimer su zakopani u zemlju, u kontroliranim uvjetima (laboratorij) i nekontroliranim uvjetima (utjecaj atmosferilija) u periodu od 2, 4, 7, 9 i 11 dana. Nakon izlaganja, uzorcima vlakana su ispitana svojstva finoće, čvrstoće te prekidno istezanje. Da bi se ispitao stupanj biorazgradnje, dobivene vrijednosti rezultata uspoređeni su s rezultatima kontrolnih uzoraka. Nakon provedenog istraživanja i analiziranja podataka vidljivo je da se na svim izloženim uzorcima svojstva koja potvđuju biorazgradnju bila smanjena, odnosno da su bili podvrgnuti djelovanju mikroorganizma.

Abstract (english)

Biodegradation or biotic degradation of polymers is a chemical degradation of materials caused by the action of microorganisms such as fungi, bacteria, and algae. The process of biodegradation is based on the activity of living organisms, and the product itself is obtained by their degradation. Natural polymers such as proteins, polysaccharides, and nucleic acids degrade by oxidation and hydrolysis reactions. Biodegradable material decomposes into biomass, carbon dioxide, and methane gas. In this study, the biodegradation of stem fibres (hemp, jute) and biopolymers (PLA) for agrotextile purposes was investigated. To investigate the biodegradability property, bast fibres and biopolymers were buried in the ground, under controlled conditions (laboratory) and uncontrolled conditions (atmospheric influence) for a period of 2, 4, 7, 9, and 11 days. After exposure, the fibre samples were tested for properties of fineness, strength, and breaking elongation. To test the degree of biodegradation, the obtained values of the results were compared with the results of control samples. After conducting the research and analysing the data, it is visible that all exposed samples had reduced properties that confirm biodegradation, i.e., they were subjected to the action of microorganisms.

• Keywords: biorazgradivost; atmosferilije; finoća vlakna; čvrstoća vlakna; prekidno istezanje vlakna
• Keywords (english): biodegradability; weathering conditions; fibre fineness; fibre strength; fibre elongation at break
• Language: croatian
• URN:NBN: urn:nbn:hr:201:189984
• 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, 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: Embargoed access; Embargo expiration date: 2028-04-01
• Created on: 2024-07-16 09:06:59