Kojo Agyapong Afrifah (Avtor), Enoch Adjei-Mensah (Avtor)

Povzetek

Predstavljamo oceno primernosti lesa vrste alstonija (Alstonia boonei) kot alternativnega vira za proizvodnjo celuloze in papirja. Vrsta je pogosta v zahodni Afriki, a je manj uporabljana. Proučili smo osnovno gostoto lesa (BD), značilnosti vlaken [dolžino vlaken (FL), premer vlaken (FD), premer lumna (LD) in debelino celične stene (WT)], anatomske indekse [prožnost (FR), vitkost (SR), koeficient togosti (RC), Luceov faktor oblike (LSF), stopnjo masivnosti (lesnatosti) vlaken (SF), Runklovo razmerje (RR)] in kemično sestavo ter lastnosti (vsebnost lignina in holoceluloze, topnost v 1 % NaOH in vsebnost pepela). Ocenili smo njihovo varibilnost vzdolž debla (spodnji, srednji in zgornji del) in ugotovili primernost lesa za proizvodnjo celuloze in papirja. Ugotovljene so bile znatne razlike v gostoti lesa in lastnostih vlaken vzdolž debla. Čeprav je bil premer vlaken velik, dolžina vlaken, tankost sten in veliki premeri lumnov omogočajo primerno formacijo vlaken ter izdelavo gostega, gladkega in močnega papirja. Ugodne vrednosti SF, RR, FR, RC in LSF vlaken bi omogočile izdelavo papirja z ustrezno odpornostjo proti trganju ter prepogibno stabilnostjo. Kemijsko gledano nižja vsebnost lignina (< 30 %), pepela in 1 % topnost v NaOH ter visoka vsebnost holoceluloze v vlaknih A. boonei omogočajo večji izkoristek pri izdelavi celulozne kaše (pulpe). Čeprav je A. boonei lesna vrsta z nizko gostoto, bi bila primerna za proizvodnjo celuloze in papirja

Ključne besede

Alstonia boonei;fibre;wood;characteristics;lesser utilized species;pulp;paper;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL BF - Biotehniška fakulteta
UDK: 630*811.1:813.1:176.1 Alstonia boonei
COBISS: 91638275 Povezava se bo odprla v novem oknu
ISSN: 0024-1067
Št. ogledov: 65
Št. prenosov: 20
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: Slovenski jezik
Sekundarni naslov: Anatomske in kemijske lastnosti lesa vrste Alstonia boonei za proizvodnjo celuloze in papirja
Sekundarni povzetek: Alstonia boonei, an abundant lesser utilized species within the West African Subregion, was evaluated as an alternative raw material for pulp and paper production. The basic density (BD), fibre characteristics [fibre length (FL), fibre diameter (FD), lumen diameter (LD) and wall thickness (WT)], derived anatomical indices [Flexibility Ratio (FR), Slenderness Ratio (SR), Rigidity Coefficient (RC), Luce’s Shape Factor (LSF), Solids Factor (SF) and Runkel Ratio (RR)] and chemical composition (lignin, holocellulose, 1% NaOH solubility and ash contents) of A. boonei were studied to evaluate variation along the trunk (base, middle and top portions) and ascertain its suitability for pulp and paper production. Significant variations were observed in the density and fibre characteristics along the trunk of the tree. Although the FD was large, the observed adequate FL, thin-wall and large LD implied easy beating of fibres and manufacture of dense, smooth and strong papers. The favourable SF, RR, FR, RC, and LSF values obtained for the fibres would produce papers with suitable burst and tearing strengths and folding endurance. Chemically the lower lignin (< 30%), ash and 1% NaOH solubility and the high holocellulose contents of A. boonei, will generate a higher pulp yield. A. boonei although a low-density species, will be desirable for pulp and paper production
Sekundarne ključne besede: les;značilnosti vlaken;manj uporabljana lesna vrsta;celuloza;papir;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 5-18
Letnik: ǂLetn. ǂ70
Zvezek: ǂšt. ǂ2
Čas izdaje: 2021
DOI: 10.26614/les-wood.2021.v70n02a02
ID: 26270519
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