Zeleni kompoziti na bazi pluta

master's thesis

• Title (english): Green composites based on (waste) cork
• Author: Sara Šušak
• Mentor: Vesna Ocelić Bulatović (mentor)
• Committee member: Vesna Ocelić Bulatović (predsjednik povjerenstva)
• Committee member: Mirela Leskovac (član povjerenstva)
• Committee member: Nevenka Vrbos (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2022-07-15, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Posljednjih godina sve je veći interes za materijalima koji proizlaze iz obnovljivih izvora, uglavnom zbog sve veće zabrinutosti povezane s onečišćenjem okoliša, nakupljanjem otpada, njegovim odlaganjem kao i neizbježnog iscrpljivanja fosilnih izvora. Termoplastični biorazgradivi polimer polilaktid (PLA) nameće se kao izvrstan izbor te održiva alternativa petrokemijskim proizvodima. S druge strane, prirodno punilo pluto koje se dobiva od vanjske kore hrasta plutnjaka ima jedinstvenu kombinaciju svojstava kao što je niska gustoća, izvrsna akustična i toplinska svojstva, nepropusnost za tekućine i plinove, elastičnost što ga čini izvrsnim kandidatom za razne primjene. Osim toga pluto je prirodni i obnovljiv proizvod koji nudi jedinstven izgled i teško mu može parirati bilo koji sintetski materijal. Zeleni kompoziti na bazi pluta održivi su materijali s potencijalnom primjenom u raznim područjima kao što su automobilska industrija (kompozitni paneli) te u građevinarstvu (podovi i izolacijske ploče). U ovom radu pripremljeni su zeleni kompoziti odnosno biokompoziti na bazi pluta i biorazgradive matrice polilaktida jednostavnim umješavanjem u Brabender gnjetilici, te prešanjem na hidrauličkoj preši. Toplinska svojstva biokompozita ispitana su diferencijalnom pretražnom kalorimetrijom (DSC), termogravimetrijskom analizom (TGA) i mjerenjem toplinske vodljivosti. Mehanička svojstva ispitana su jednoosnim rasteznim ispitivanjem na mehaničkoj kidalici. Provedena je i analiza površinskih svojstava primjenom kontaktnog kuta kako bi se dobio uvid u interakcije na međupovršini PLA/pluta kompozita.

Abstract (english)

In recent years, there has been an increasing interest in materials derived from renewable sources, mainly due to growing concerns related to environmental pollution, waste accumulation and its disposal, as well as the inevitable depletion of fossil resources. The thermoplastic biodegradable polymer polylactide (PLA) is emerging as an excellent choice and a sustainable alternative to petrochemical products. On the other hand, the natural cork filler obtained from the outer bark of cork oak has a unique combination of properties. Low density, excellent acoustic and thermal properties, impermeability to liquids and gases and elasticity makes it excellent candidate for various applications. In addition, cork is a natural and renewable product that offers a unique look that cannot be matched by any synthetic material. Cork-based green composites are sustainable materials with potential applications in various fields such as automotive industry (composite panels) and construction (flooring and insulation panels). In this work, green composites or biocomposites based on cork and biodegradable polylactide matrix were prepared by simple mixing in a Brabender's kneader and pressing on a hydraulic press. The thermal properties of biocomposites were tested by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and thermal conductivity measurement. The mechanical properties were tested by uniaxial tensile testing on a mechanical tear machine. An analysis of the surface properties using the contact angle was also carried out in order to gain insight into the interactions at the PLA/cork composite interface.

• Keywords: zeleni kompoziti; polilaktid (PLA); pluto
• Keywords (english): green composites; polylactide (PLA); cork
• Language: croatian
• URN:NBN: urn:nbn:hr:149:670353
• Project: Number: IP-2019-04-9661; Title: Primjena naprednih tehnologija obrade voda za uklanjanje mikroplastike; Title: Advanced Water Treatment Technologies for Microplastics Removal; Acronym: AdWaTMiR; Leader: Tomislav Bolanča; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: Chemical Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2023-03-10 14:31:06