Effect of pressurized hot water extraction on the resistance of Scots pine sapwood against mould fungi-Reference-Cited by-同舟云学术

Effect of pressurized hot water extraction on the resistance of Scots pine sapwood against mould fungi

Published:2023-03-15 Issue:5 Volume:77 Page:348-355
ISSN:0018-3830
Container-title:Holzforschung
language:en
Short-container-title:

Author:

Kyyrö Suvi¹^ORCID,Altgen Michael¹,Belt Tiina²,Seppäläinen Hanna¹^ORCID,Brischke Christian³,Heinze Petra³,Militz Holger³,Rautkari Lauri¹

Affiliation:

1. Department of Bioproducts and Biosystems, School of Chemical Engineering , Aalto University , P.O. Box 16300, 00076 Aalto , Finland

2. Production Systems , Natural Resources Institute Finland , Viikinkaari 9, 00790 Helsinki , Finland

3. Department of Wood Biology and Wood Products , Faculty of Forest Sciences and Forest Ecology, University of Göttingen , Büsgenweg 4, D-37077 Göttingen , Germany

Abstract

Abstract The effects of pressurized hot water extraction (HWE) treatment on the mould resistance of wood have not been extensively investigated yet. The activity of the mould fungi is dependent on the availability of nutrients. Therefore, the soluble degradation products produced during HWE treatment could affect the wood’s susceptibility to mould growth. Scots pine (Pinus sylvestris L.) sapwood specimens were treated with HWE at 140 °C for 1–5 h. Afterwards, the degradation products were either removed via leaching or the wood was dried without applying the leaching procedure. The surface layer (1.5 mm) was removed from half of the leached and non-leached specimens. The resistance of the specimens against mould growth was tested in an incubation chamber. HWE treated wood showed a higher susceptibility to mould growth when it was neither leached nor subjected to surface removal. The susceptibility of wood to mould fungi depended on the availability of hemicellulose-based degradation products produced during HWE treatment. These degradation products were removable via a leaching procedure, but also by removing the outermost layer of the wood. The results show the relevance of removing HWE degradation products located on the wood surface in improving resistance against mould growth.

Funder

Financial support from the Academy of Finland

South Savo Regional Council of the European Regional Development Fund

Publisher

Walter de Gruyter GmbH

Subject

Biomaterials

Link

https://www.degruyter.com/document/doi/10.1515/hf-2022-0190/pdf

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