Vpliv vrste lesa na emisije formaldehida iz trislojne iverne plošče

diplomsko delo - visokošolski strokovni študij

Klemen Purkart (Author), Milan Šernek (Reviewer), Sergej Medved (Mentor)

Abstract

Emisija formaldehida iz lesnih plošč je primarno posledica rabe polikondenzacijskih lepil na osnovi formaldehida. Raziskovali smo vpliv vrste lesa na izhajanje prostega formaldehida. Iz 4 drevesnih vrst smo naredili trislojne iverne plošče in jim nato preko steklenične metode izmerili vsebnost emisije prostega formaldehida. Uporabili smo naslednje drevesne vrste: bukev (Fagus Sylvatica), hrast (Quercus robur), smreko (Picea Abies) in vrbo (Salix Alba). Kot testna oziroma kontrolna plošča je bila uporabljena plošča, pripravljena iz industrijskega iverja. Ugotovili smo, da se z ustrezno vrsto lesa količina emitiranega formaldehida zmanjša. Vzrok za to so polifenolne snovi, kot so ekstraktivi, lignin in tanin. Z mešanjem različnih vrst lesa v industrijsko pripravljenem iverju pa dosežemo nizko emisijo formaldehida ter dobre mehanske in fizikalne lastnosti.

Keywords

drevesne vrste;lesne plošče;iverne plošče;lepilo;formaldehid;

Data

Language:	Slovenian
Year of publishing:	2012
Source:	Ljubljana
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[K. Purkart]
UDC:	630*862.2
COBISS:	2016137
Views:	1244
Downloads:	248
Average score:	0 (0 votes)
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Other data

Secondary language:	English
Secondary title:	Impact of wood species on formaldehyde emission from three-layer particleboard
Secondary abstract:	Free formaldehyde emission from wood based panels is the result of polycondensation glues. We studied the impact of wood species on the leakage of free formaldehyde. We made three-layer particleboards from 4 wood species, and then through WKI method measured the emission of free formaldehyde. We used the following tree species: beech (Fagus sylvatica), oak (Quercus robur), spruce (Picea abies) and willow (Salix alba). As a test or control panel we used the panel prepared from industrial particles. The appropriate wood species reduce the amount of formaldehyde emitted; the reason being polyphenolic substances such as extracts, lignin and tannin. By mixing the different wood species in industrially prepared panels, low emission of formaldehyde and good mechanical and physical properties are achieved.
Secondary keywords:	wood species;wood based panels;particleboard;glue;formaldehyde;
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages:	VIII, 26 f., [2] f. pril.
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;agriculture and related sciences and techniques;forestry;farming;wildlife exploitation;kmetijstvo ter sorodne vede in tehnologije;forestry;gozdarstvo;forest products and their utilization;gozdni proizvodi in njihova uporaba;
ID:	22096