diplomsko delo
Povzetek
V naši raziskavi smo preučili uporabo ter lastnosti ivernim ploščam podobnega kompozita iz pšeničnih otrobov. Zbrane otrobe smo posušili in ločili v dva velikostna razreda, in sicer v fine frakcije (sita z odprtino 1,0 mm in manjše) in velike frakcije (sita z odprtinami 1,27 mm in več). V nadaljevanju smo izdelali otrobe, jih oblepili z urea-formaldehidnim lepilom in z njimi izvedli serijo poizkusov. Izdelali smo enoslojne plošče (z uporabo vseh frakcij), kjer smo preverjali vpliv deleža lepila, ter trislojne plošče, kjer smo preverjali vpliv gostote. Pri enoslojnih ploščah smo uporabili vse frakcije (delež lepila med 7,5 in 20 %), pri trislojnih ploščah smo za zunanji sloj uporabili fine frakcije (delež lepila 20 %), za srednji sloj pa grobe frakcije (delež lepila 20 %). Izdelanim ploščam smo določili debelino in gostoto, upogibno trdnost in modul elastičnosti, razslojno trdost ter debelinski nabrek. Dobljeni rezultati kažejo na možnost uporabo plošč v nezahtevne namene, torej na uporabo za pakiranje, embalažo ter izdelke, kjer se ne pričakuje visoke trdnosti.
Ključne besede
pšenica;otrobi;lesni kompoziti;iverna plošča;urea-formaldehid;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2024 |
Tipologija: |
2.11 - Diplomsko delo |
Organizacija: |
UL BF - Biotehniška fakulteta |
Založnik: |
[K. Završki] |
UDK: |
630*862 |
COBISS: |
209979907
|
Št. ogledov: |
45 |
Št. prenosov: |
4 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Miller's bran as alternative source for particleboard manufacturing |
Sekundarni povzetek: |
In our research, we examined the use and properties of a composite similar to particleboard made from miller’s bran. The collected bran was dried and separated into two size classes: fine fractions (sieves with openings of 1.0 mm and smaller) and large fractions (sieves with openings of 1.27 mm and larger). Subsequently, the bran was coated with urea-formaldehyde adhesive and a series of experiments were conducted. We produced single-layer boards (using all fractions) to test the effect of adhesive content, and three-layer boards to investigate the effect of density. For the single-layer boards, all fractions were used (with adhesive content ranging from 7.5% to 20%), while for the three-layer boards, fine fractions were used for the outer layers (with 20% adhesive content), and coarse fractions were used for the middle layer (with 20% adhesive content). The produced boards were tested for thickness and density, bending strength and elastic modulus, internal bond strength, and thickness swelling. The results suggest that these boards could be suitable for basic uses like packaging and products where high strength is not required. |
Sekundarne ključne besede: |
weat;bran;wood composites;particleboard;urea-formaldehyde; |
Vrsta dela (COBISS): |
Diplomsko delo/naloga |
Študijski program: |
0 |
Konec prepovedi (OpenAIRE): |
1970-01-01 |
Komentar na gradivo: |
Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo |
Strani: |
1 spletni vir (1 datoteka PDF (VII, 35 str.)) |
ID: |
25096014 |