diplomsko delo
Aljaž Kordiš (Avtor), Bogdan Šega (Recenzent), Milan Šernek (Mentor)

Povzetek

Razvoj in produkcija plastičnih materialov sta od druge polovice 20. stoletja pa vse do danes močno narasla, to pa je s seboj prineslo velik ekološki problem. Iz leta v leto svet proizvede vedno več naravno obstojnih plastičnih odpadkov, ki se kopičijo v naravi. Ena izmed rešitev je njihova reciklaža in ponovna uporaba za izdelavo novih izdelkov ali polizdelkov. Reciklirana plastika, predvsem termoplasti, imajo potencial tudi v lesni panogi. V naši raziskavi smo iz odpadnih kavnih lončkov in žličk iz polistirena ter s topilom dimetilformamid izdelali lepilni mešanici za lepljenje lesa ter izdelali lepljence za ugotavljanje strižne trdnosti lepilnih spojev po standardu SIST EN 205:2016. Uporabili smo dve temperaturi stiskanja (150 °C in 120 °C) ter štiri načine temperiranja lepljencev pred odprtjem stiskalnice. S primerjavo različnih postopkov stiskanja smo ugotovili, da lepilo iz lončkov najvišjo trdnost doseže po ohladitvi lepljencev na 75 °C preden smo jih vzeli iz stiskalnice, medtem ko lepilo iz žličk po hlajenju lepljencev na 100 °C ali 25 °C. Ugotovili smo tudi, da se s hlajenjem lepljencev na nižjo temperaturo pred odprtjem stiskalnice bistveno zmanjša variabilnost rezultatov, kar priča o bolj zanesljivih lepilnih spojih. Zahteve standarda SIST EN 204:2016 smo uspeli doseči z lepljencem, ki je bil zlepljen z lepilom iz lončkov pri temperaturi 150 °C in ohlajen na 75 °C preden smo ga vzeli iz stiskalnice.

Ključne besede

reciklaža;polistiren;dimetilformamid;lepljenje;lepilni spoj;optimizacija;strižna trdnost;

Podatki

Jezik: Slovenski jezik
Leto izida:
Tipologija: 2.11 - Diplomsko delo
Organizacija: UL BF - Biotehniška fakulteta
Založnik: [A. Kordiš]
UDK: 630*824.839
COBISS: 76287235 Povezava se bo odprla v novem oknu
Št. ogledov: 251
Št. prenosov: 47
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: Bonding of wood with the adhesive from waste polystyrene
Sekundarni povzetek: Since the second half of the 20th century both the development and production of plastic materials have risen strongly, causing a significant ecological problem. Each year the world produces more and more naturally durable plastic waste, which is accumulating in nature. One of the solutions to ease its impact is to recycle and reuse it for new products and intermediate products. Recycled plastic, especially thermoplastic, has great potential in the wood industry. In our research we have used waste coffee cups and spoons made of polystyrene to make two adhesive mixtures, using dimethylformamide as a solvent. To establish the shear strength of adhesive bonds, we made bonded panels according to the instructions by standard SIST EN 205:2016. The idea was to optimize the temperature of hot pressing and to add a cooling procedure to ensure better joint shear strength, which is needed to reach the minimum criteria of the SIST EN 204:2016 standard. We used two temperatures for hot pressing (150 °C and 120 °C) and four ways of panel cooling in a closed press. After trying out different procedures, we came to the conclusion that the best way to use a coffee cup adhesive is to cool it down to 75 °C, while for the spoon-based adhesive the best gluing method is to cool the joints down to 100 °C or 25 °C. We also found that by cooling the panels in a closed press the consistency of the results increases, which makes the adhesive more reliable. We managed to reach standard criteria with a sample which had been glued with coffee cup adhesive, hot pressed at 150 °C and cooled down to 75 °C before being taken out of the press.
Sekundarne ključne besede: recycling;polystyrene;dimethylformamide;gluing;adhesive bond;optimization;shear strength;
Vrsta dela (COBISS): Diplomsko delo/naloga
Študijski program: 0
Komentar na gradivo: Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Strani: VIII, 45 f., [8] f. pril.
ID: 13359969