Efficacy of linseed- and tung-oil-treated wood against wood-decay fungi and water uptake

Humar, Miha; Lesar, Boštjan

doi:10.1016/j.ibiod.2013.07.011

Cited by 94 publications

(78 citation statements)

References 7 publications

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“…In addition to their utilization as starting materials for many industrial chemical products, plant oils have frequently been applied as eco-friendly products for wood protection as a result of the hydrophobic character of plant oils [14][15][16]. However, due to lack of covalent bonding between the water repellents and wood's hydroxyl groups, plant oils cannot fully prevent the process of water absorption in a long term [17]. Moreover, the checking in wood exposed outdoors can also be overcome by oil [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…However, due to lack of covalent bonding between the water repellents and wood's hydroxyl groups, plant oils cannot fully prevent the process of water absorption in a long term [17]. Moreover, the checking in wood exposed outdoors can also be overcome by oil [17,18]. Plant oils, in general, have no fungicidal properties but can inhibit wood decay fungi to some extent.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies revealed that the durability of treated wood with low oil loading can be improved by either adding fungicide (such as boric acid) or bio-oil which itself contains antifungal phenolic compounds (such as crude tall oil) [16,17,20]. Plant oil treated wood is suggested to be used in hazard class 2 or 3 (above ground covered or uncovered) due to temporary inhibition of water absorption [17,21]. To increase the durability of plant oil treated wood, a possible route is to copolymerize plant oil with other vinyl monomers forming copolymers.…”

Section: Introductionmentioning

confidence: 99%

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The reactivity of linseed and soybean oil with different epoxidation degree towards vinyl acetate and impact of the resulting copolymer on the wood durability

Jebrane¹,

Cai²,

Sandström³

et al. 2017

Express Polym. Lett.

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Abstract. Linseed (LO) and soybean oil (SO) were in-situ epoxidized with peracetic acid to produce different degree of epoxidized LO and epoxidized SO. For comparison purpose, commercial epoxidized linseed oil (ELO ® ) and epoxidized soybean oil (ESO ® ) were also included in the study. The effect of epoxidation degree on the copolymerization reaction between epoxidized oils and vinyl acetate (VAc) was investigated. Results showed that a copolymer can be formed between VAc and epoxidized LO with high epoxy content, while no reaction occurred between VAc and SO or its epoxidized derivatives. As the most reactive monomer among the studied oils, the epoxidized LO with highest epoxy content (i.e. ELO ® ) was mixed with VAc and then impregnated into the wood using three different ELO ® /VAc formulations either as solution or as emulsions. After curing, the impact of the resulting copolymer issued from the three tested formulations on the wood durability was evaluated. Results showed that the formulation comprising VAc, ELO ® , H 2 O, K 2 S 2 O 8 and alkaline emulsifier (Formulation 3) can significantly improve wood's durability against white rot-(Trametes versicolor) and brown rot fungi (Postia placenta and Coniophora puteana). Treated wood of 8% weight percentage gain (WPG) was sufficient to ensure decay resistance against the test fungi with less than 5% mass loss.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The reactivity of linseed and soybean oil with different epoxidation degree towards vinyl acetate and impact of the resulting copolymer on the wood durability

Jebrane¹,

Cai²,

Sandström³

et al. 2017

Express Polym. Lett.

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show abstract

“…20,21 Tung Oil-treatment on wood is used for protection against wood-decay fungi and to decrease water uptake of wood. 22 This decreased water uptake is reported for laboratory but also for long term field tests. The Tung Oil treatment is as well mentioned as an effective mean to replace traditional biocidal treatment for wood, which are under consideration, because of possible hazardous potential.…”

Section: Introductionmentioning

confidence: 60%

“…The Tung Oil treatment is as well mentioned as an effective mean to replace traditional biocidal treatment for wood, which are under consideration, because of possible hazardous potential. 22 The use of Tung Oil for textile treatment is mentioned in some older patent references. 23,24 However, in those references the main focus for the Tung Oil is not to realize water-repellent textiles.…”

Section: Introductionmentioning

confidence: 99%

A Natural Based Method for Hydrophobic Treatment of Natural Fiber Material

Kick

Grethe

Mahltig

2017

ACSi

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A treatment for hydrophobic functionalization of natural fiber materials is developed. This hydrophobic treatment is based mainly on natural products. As hydrophobic component the natural Tung Oil is used, which is originally a compound used for wood conservation purposes. The application on textile is done in a padding process under presence of an oxidative agent. For the current investigations a fiber felt from linen was used. The hydrophobic effect is determined by the concentration of Tung Oil and the duration of a thermal drying process. The hydrophobic effect is investigated by capillary rise tests and contact angle measurements. Scanning electron microscopy SEM is used to investigate the surface topography of the fiber material and the deposited hydrophobic material. Altogether, an interesting and promising method for hydrophobisation of natural fibers is developed, which could especially be used as part of a production process of a fiber reinforced composite material, mainly based on natural products.

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Preparation and properties of epoxy‐modified tung oil waterborne insulation varnish

Cao

Wang

Cai

et al. 2015

J of Applied Polymer Sci

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This work aimed to develop a novel epoxy-modified tung oil waterborne insulation varnish with blocked hexamethylene diisocyanate as a curing agent. The Diels-Alder reaction between tung oil and maleic anhydride, and the ring-opening esterification reaction of epoxy resin were confirmed. The conversion rate of epoxy was explored as a function of reaction time and temperature. The effects of epoxy resin content on the thermal stability, water absorption and insulation properties (insulation strength, volume resistivity, and surface resistivity) of films were investigated, and the resistances of films to salted water were evaluated. The increase in epoxy resin contents could improve the thermal stability and insulation properties of films, and decreased the water adsorption of films, but when the epoxy resin content reached 30% and above, the water solubility of resin became poor. After being immersed in 3.5 wt % NaCl solution, the electrical insulation strength of films were lower than that in dry state, and decreased as the immersed time prolonged. In particular, the electrical insulation strength loss of films increased significantly for epoxy resin content at 15% and below. Furthermore, the increase of epoxy resin content could improve the hardness and adhesion of films, but the flexibility of films became worse. On the basis of experimental, the epoxy resin content at 25% was appropriate to prepare waterborne epoxy-modified tung oil resin. The resulting varnish may have potential as an immersing insulation varnish for the spindle of electric motor. V C 2015Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42755.

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Efficacy of linseed- and tung-oil-treated wood against wood-decay fungi and water uptake

Cited by 94 publications

References 7 publications

The reactivity of linseed and soybean oil with different epoxidation degree towards vinyl acetate and impact of the resulting copolymer on the wood durability

The reactivity of linseed and soybean oil with different epoxidation degree towards vinyl acetate and impact of the resulting copolymer on the wood durability

A Natural Based Method for Hydrophobic Treatment of Natural Fiber Material

Preparation and properties of epoxy‐modified tung oil waterborne insulation varnish

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