Utjecaj plastifikatora na svojstva biorazgradivog termoplastičnog škroba

master's thesis

• Title (english): Influence of plasticizers on the properties of biodegradable thermoplastic starch
• Author: Marija Marić
• Mentor: Mirela Leskovac (mentor)
• Committee member: Mirela Leskovac (predsjednik povjerenstva)
• Committee member: Emi Govorčin Bajsić (član povjerenstva)
• Committee member: Jasna Prlić Kardum (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

Upotreba plastike je s godinama postajala sve veća te je preuzela vodeću ulogu, od kućanskih predmeta do avionske industrije. Poznata je činjenica da je utjecaj plastike na okoliš veoma loš zbog problematike odlaganja plastičnog otpada i nemogućnosti biorazgradnje. Kako bi se taj problem riješio, traga se za novim materijalima koji bi imali jednako dobra svojstva kao i plastika, uz dodatak biorazgradivosti. U tu svrhu koriste se prirodni polimeri, od kojih je vrlo važan škrob. Procesom plastifikacije škrob se prevodi u polimernu kontinuiranu fazu, tzv. termoplastični škrob (TPS). TPS ne posjeduje zadovoljavajuća svojstva da bi se koristio umjesto plastike, no dodatkom različitih plastifikatora, aditiva, punila i sl. mogu se poboljšati njegova svojstva. U ovom radu ispitana su svojstva filmova termoplastičnog škroba pripravljenih s različitim plastifikatorima (voda, glicerol, urea, propilen glikol) metodom lijevanja i metodom prešanja. Na dobivenim filmovima TPS-a ispitivana su površinska svojstva, toplinska svojstva, barijerna svojstva, tvrdoća i mehanička svojstva. Rezultati su pokazali da se svojstva filmova TPS-a znatno mijenjaju ovisno o plastifikatoru koji je korišten za pripravu filma. Na to utječe struktura plastifikatora i njegova sposobnost ugrađivanja u strukturu škroba.

Abstract (english)

The use of plastic has increased over the years and it has taken a leading role, from household items to the aerospace industry. It is well known that the impact of plastics on the environment is very bad due to the problem of disposal of plastic waste and the impossibility of biodegradation. To solve this problem, new materials are being sought that have the same good properties as plastics and are also biodegradable. For this purpose, natural polymers are used, of which starch is very important. Through the process of plasticization, starch is transformed into a polymeric continuous phase, called thermoplastic starch (TPS). TPS does not have satisfactory properties to be used instead of plastic, but its properties can be improved by adding various plasticizers, additives, fillers, etc. In this work, the properties of thermoplastic starch films prepared with different plasticizers (water, glycerol, urea, propylene glycol) were investigated by solution casting and compression moulding. The obtained TPS films were evaluated for their surface, thermal, barrier and mechanical properties. The results showed that the properties of the TPS films change significantly depending on the plasticizer used to produce the film. This is influenced by the structure of the plasticizer and its ability to integrate into the starch structure.

• Keywords: termoplastični škrob; glicerol; kolin klorid; urea; polipropilen glikol; plastifikatori
• Keywords (english): thermoplastic starch; glycerol; choline chloride; urea; propylene glycol; plasticizers
• Language: croatian
• URN:NBN: urn:nbn:hr:149:304826
• Study programme: Title: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Applied organic chemistry; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-03-10 14:49:30