Influence of Copper and Biopolymer/Saqez Resin on the Properties of Poplar Wood

There is an increasing interest in applying environmentally-friendly materials in wood protection technology. This include the use of less toxic active ingredients, as well as better fixation. This study investigates the formulation based on the combination of copper and Saqez resin on the physical and biological resistance properties of poplar wood. Samples were treated by either copper-ethanolamine (Cu/MEA) and/or Saqez resin at various treatment levels. A vacuum pressure procedure was applied. The retention, weight percent gain, water absorption, volumetric swelling, and decay resistance of the samples were then determined. The highest retention and weight percent gain were obtained at the samples treated with the combination of copper-based system and Saqez resin. Additionally, the combination of the copper and Saqez improved the physical properties and decay-resistance against white-rot fungus Trametes versicolor.

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Influence of Copper and Biopolymer/Saqez Resin on the Properties of Poplar Wood

Forests ◽

10.3390/f11060667 ◽

2020 ◽

Vol 11 (6) ◽

pp. 667 ◽

Cited By ~ 1

Author(s):

Huijun Dong ◽

Mohsen Bahmani ◽

Sohrab Rahimi ◽

Miha Humar

Keyword(s):

Physical Properties ◽

Trametes Versicolor ◽

Weight Percent Gain ◽

Weight Percent ◽

Decay Resistance ◽

White Rot ◽

White Rot Fungus ◽

Poplar Wood ◽

Wood Protection ◽

Increasing Trend

There is an increasing trend in the use of environmentally-friendly materials in wood protection. This includes the use of less toxic active ingredients, as well as better fixation. This study investigates the formulation based on the combination of copper and Saqez resin on the physical and biological resistance properties of poplar wood. Samples were treated by either copper-ethanolamine (Cu/MEA) and/or Saqez resin at various treatment levels. A vacuum pressure procedure was applied. The retention, weight percent gain, water absorption, volumetric swelling, and decay resistance of the samples were then determined. The highest retention and weight percent gain were obtained in the samples treated with the combination of copper-based system and Saqez resin. Additionally, the combination of the copper and Saqez improved the physical properties and decay-resistance against white-rot fungus Trametes versicolor.

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Evaluation and identification of walnut heartwood extractives for protection of poplar wood

BioResources ◽

10.15376/biores.6.1.59-69 ◽

2010 ◽

Vol 6 (1) ◽

pp. 59-69

Author(s):

Seyyed Khalil Hosseini Hashemi ◽

Ahmad Jahan Latibari

Keyword(s):

Weight Loss ◽

Trametes Versicolor ◽

Juglans Regia ◽

White Rot ◽

White Rot Fungus ◽

Poplar Wood ◽

Vacuum Desiccator ◽

Highest Weight ◽

Complete Saturation ◽

Heartwood Extractives

Walnut (Juglans regia L.) heartwood extractives were identified and their potential for protection of poplar wood was evaluated. Test specimens were prepared from poplar wood (Populus nigra L.) to meet BS 838:1961 requirements. Samples were impregnated with heartwood extractive solution (1.5, 2.5, and 3.5% w/w in ethanol-toluene), followed by 5 hours vacuum desiccator technique to reach complete saturation. Impregnated specimens were exposed to white-rot fungus (Trametes versicolor) for 14 weeks according to BS 838:1961 applying the kolle-flask method. The weight loss of samples was determined after exposure to white-rot fungus. The highest weight loss (36.96%) was observed for untreated control samples and the lowest weight loss (30.40%) was measured in samples treated with 1.5% extractives solution. The analyses of the extracts using GC/MS indicated that major constituents are benzoic acid,3,4,5-tri(hydroxyl) and gallic acid (44.57 %). The two toxic components in the heartwood are juglone (5.15 %) and 2,7-dimethylphenantheren (5.81 %).

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Outdoor Wood Mats-Based Engineering Composite: Influence of Process Parameters on Decay Resistance against Wood-Degrading Fungi Trametes versicolor and Gloeophyllum trabeum

Polymers ◽

10.3390/polym13183173 ◽

2021 ◽

Vol 13 (18) ◽

pp. 3173

Author(s):

Minzhen Bao ◽

Neng Li ◽

Yongjie Bao ◽

Jingpeng Li ◽

Hao Zhong ◽

...

Keyword(s):

Chemical Composition ◽

Mass Loss ◽

Process Parameters ◽

Trametes Versicolor ◽

Decay Resistance ◽

Resin Content ◽

White Rot ◽

White Rot Fungus ◽

Gloeophyllum Trabeum ◽

Influence Of Process Parameters

The process parameters significantly influence the preparation and final properties of outdoor wood mats-based engineering composite (OWMEC). During outdoor use, wood composites are susceptible to destruction by rot fungi. Herein, the role of process parameters such as density and resin content on OWMEC resistance to fungal decay was investigated. The poplar OWMEC samples were exposed to white-rot fungus Trametes versicolor and brown-rot fungus Gloeophyllum trabeum for a period of 12 weeks. The chemical composition, crystallinity, and morphology were evaluated to investigate the effect of process parameters on the chemical composition and microstructure of the decayed OWMEC. With an increase in the density and resin content, the mass loss of the decayed OWMEC decreased. The highest antifungal effect against T. versicolor (12.34% mass loss) and G. trabeum (19.43% mass loss) were observed at a density of 1.15 g/m3 and resin content of 13%. As results of the chemical composition and microstructure measurements, the resistance of OWMEC against T. versicolor and G. trabeum fungi was improved remarkably by increasing the density and resin content. The results of this study will provide a technical basis to improve the decay resistance of OWMEC in outdoor environments.

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The Resistance of Wood Chemically Modified with Isocyanates. Part 1. Brown Rot, White Rot and Acid Chlorite Delignification

Holzforschung ◽

10.1515/hf.1999.039 ◽

1999 ◽

Vol 53 (3) ◽

pp. 230-236 ◽

Cited By ~ 9

Author(s):

F. Cardias Williams ◽

M.D. Hale

Keyword(s):

Chemical Modification ◽

Weight Percent Gain ◽

Brown Rot ◽

Weight Percent ◽

Pinus Nigra ◽

Fungal Species ◽

White Rot ◽

Sodium Chlorite ◽

Pycnoporus Sanguineus ◽

Wood Protection

Summary This study was to assess the bioprotectant performance of chemical modification with three different isocyanates (n-butyl, hexyl and 1,6-diisocyanatohexane, BuNCO, HeNCO and HDI respectively) in Corsican pine (Pinus nigra Schneid) sapwood. Wood-isocyanate bond formation was verified by the increase in sample weight, volume and by infra-red spectroscopy. Basidiomycete (Coniophora puteana, Gloeophyllum trabeum, Coriolus versicolor, Pycnoporus sanguineus) decay tests demonstrated protection by chemical modification. The relationships of fungal species, weight percent gain (WPG), and decay induced weight loss were examined. One of the brown rot fungi, C. puteana, showed higher threshold protection values than the other fungi tested and the diisocyanate showed better performance. Chemical characteristics of the sound and brown rotted wood (C. puteana) have been examined using sulphuric acid and sodium chlorite procedures to clarify the principles which govern isocyanate modifications and restrict fungal decay. These demonstrated that appreciable wood protection against C. puteana only occurred when the holocellulose fraction showed substantial changes due to chemical modification.

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Investigation of fungal decay of poplar wood treated with pistachio resin

BioResources ◽

10.15376/biores.16.1.779-788 ◽

2020 ◽

Vol 16 (1) ◽

pp. 779-788

Author(s):

Maede Ahadnezhad ◽

Soheila Izadyar ◽

Davood Efhamisisi

Keyword(s):

Mass Loss ◽

Trametes Versicolor ◽

Populus Deltoides ◽

Treated Wood ◽

Brown Rot ◽

White Rot ◽

White Rot Fungus ◽

Poplar Wood ◽

Fungal Decay ◽

Brown Rot Fungus

The density, swelling, and fungal decay of poplar (Populus deltoides) wood treated with pistachio resin (PR) obtained from Pistacia atlantica were investigated. The white-rot fungus Trametes versicolor and the brown-rot fungus Coniophora puteana were used. Methanolic solutions of PR with different concentrations of 1%, 6%, 12%, and 15% were used as the preservative solution. Wood samples were saturated by two different vacuum/pressure (V/P) and dipping methods. The density, volumetric swelling of treated wood, and their mass loss (ML) caused by fungal decay were determined. The density of treated species increased to 15.4% and 5.8% for V/P and dipping methods, respectively, at 15% PR concentration. The volumetric swelling of the treated samples was reduced to 24.5% and 16.8% for V/P and dipping procedure, respectively, at 15% PR concentration. The mass loss of treated samples after exposure to T. versicolor was less than the untreated one (17.4% for V/P and 22.6% for dipping methods at 15% PR concentration). The results showed the better performance of V/P treatment in promotion of wood durability against fungal decay than the dipping method.

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The fungal resistance of wood modified with glutaraldehyde

Holzforschung ◽

10.1515/hf.2011.138 ◽

2012 ◽

Vol 66 (2) ◽

Cited By ~ 7

Author(s):

Zefang Xiao ◽

Yanjun Xie ◽

Carsten Mai

Keyword(s):

Scots Pine ◽

Beech Wood ◽

Weight Percent Gain ◽

Brown Rot ◽

European Beech ◽

Soft Rot ◽

Weight Percent ◽

Fungal Resistance ◽

White Rot ◽

White Rot Fungus

Abstract Scots pine sapwood (Pinus sylvestris L.) and European beech wood (Fagus sylvatica L.) were treated with glutaraldehyde (GA) in aqueous solution in the presence of magnesium chloride as a catalyst to evaluate the durability improvement towards staining and rot fungi. The GA modified specimens were dipped in a spore suspension of the blue stain fungus Aureobasidium pullulans and incubated for 8 weeks. The growth on both pine and beech wood was restrained, when the weight percent gain (WPG) of the specimens was above 7%. Under this condition, GA-modified beech wood did not suffer any mass loss after incubation with the white rot fungus Trametes versicolor. The threshold to prevent decay of beech and pine specimens towards the brown rot fungus Coniophora puteana was at a WPG of only 3%. GA treatment to a WPG over 6% protected the Scots pine stakes from soft rot decay during 32 weeks’ exposure according to ENv 807 (2001).

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