Using iron catalyst to enhance the drying properties of crude tall oil-based wood preservative

Hyvönen, Anna; Nelo, Mikko; Piltonen, Petteri; Hormi, Osmo; Niinimäki, Jouko

doi:10.1007/s00107-006-0119-7

Cited by 16 publications

(6 citation statements)

References 3 publications

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“…This has environmental benefits as it uses water as a thinner, instead of the common organic solvents. Another option is to promote the oxidation and polymerization of the crude tall oil, which can be accelerated by iron catalysts, thus preventing the oil from exuding out of the wood and keeping the water repellent efficiency (Hyvönen et al, 2007a). Limiting to some extent the water uptake by the emulsion technique will allow the tall oil to dry, and promoting the in situ iron oxidation will keep it into the wood (Hyvönen et al, 2007b).…”

Section: Oils and Moisture Controlmentioning

confidence: 99%

Preservación de la madera usando productos naturales

González‐Laredo

Rosales-Castro²,

Rocha‐Guzmán

et al. 2015

MYB

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It is a current concern in the wood preservation field to avoid the use of toxic chemicals and develop new technologies based on low environmental impact agents and sustainable principles. Under this expectation, an intended state-of-the-art is introduced on the application of natural products such as traditional tar and wood oils as well as tannins and plant extracts. A particular revision to heartwood chemical components is offered. The combined methods of using natural and chemical components are reviewed, considering as outstanding the mixtures of natural organic constituents with cooper and boron salts that seem to be under encouraging experimentation. Fungicides and anti-termite applications are commented as well the leaching problem of inorganic salts. Chemical modification of wood structure through the formation of adducts and the treatment with nanomaterials are promising tools that will change the actual view and performance of wood preservation techniques.Preservación de la madera usando productos naturalesUna de las prioridades actuales en el campo de la preservación de madera es evitar el uso de materiales tóxicos, desarrollando nuevas tecnologías fundamentadas en principios sustentables y empleando agentes de bajo impacto ambiental. Con esta expectativa se plantea una revisión del estado del arte sobre la aplicación de productos naturales, tales como taninos, alquitrán, aceites y extractos vegetales. Se presenta en particular una revisión sobre los componentes químicos contenidos en el duramen de maderas naturalmente resistentes. Se analizan los métodos combinados de ingredientes naturales y químicos, resaltando las mezclas de componentes naturales orgánicos con sales de cobre y boro que parecen representar una opción experimental confiable. Se comentan también las aplicaciones fungicidas y anti termitas, así como los problemas de lixiviación de sales inorgánicas. Opciones como la modificación química de la madera vía la formación de aductos y por tratamiento con nanomateriales son procesos promisorios que cambiaran eventualmente la manera de ver y aplicar la tecnología actual de preservación de maderas.

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Section: Oils and Moisture Controlmentioning

confidence: 99%

Preservación de la madera usando productos naturales

González‐Laredo

Rosales-Castro²,

Rocha‐Guzmán

et al. 2015

MYB

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“…Vegetable oils have long been used to protect woods from mold and fungi decay as well as to reduce its moisture accessibility owing to its non-toxicity and environmentally friendly nature [19]. Unsaturated oils can be oxidised when exposed to atmospheric oxygen leading to the formation of a protective layer on the surface of the wood [20]. Application of oil during heat treatment, or so-called oil heat treatment or oleothermal treatment is able to improve the properties of wood through synergetic effect of the oil and heat.…”

Section: Introductionmentioning

confidence: 99%

Thermal treatment of wood using vegetable oils: A review

Lee

Zaidon

Lum

et al. 2018

Construction and Building Materials

116

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“…Since no chemical linking is established between wood and oil, the LO impregnation could only reduce the water adsorption rate but not the final moisture content [15]. Furthermore, the oxidative polymerization of LO needs extensive time, resulting in oil to exude from the wood [16]. Linseed oil that has been epoxidized (ELO) may speed up oxidative polymerization [17].…”

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confidence: 99%

Improved Water Repellency and Dimensional Stability of Wood via Impregnation with an Epoxidized Linseed Oil and Carnauba Wax Complex Emulsion

Chen

Wang

Cao

et al. 2020

Forests

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Natural wood is susceptible to moisture during its practical use, limiting not only service life but also the range of uses. In this study, plant extracts, specifically linseed oil and carnauba wax (both environmentally friendly and water-repellent substances), were examined as a means to mitigate limitations of natural wood. Stable and homogenous epoxidized linseed oil/carnauba wax emulsions with an average particle size less than 230 nm were used as a modifier to enhance the performance of wood. Weight percentage gain, bulking coefficient, micromorphology, chemical structure, moisture adsorption, contact angle, water repellency, and dimensional stability of treated wood were measured. Using a scanning electron microscope (SEM), it was observed that carnauba wax and epoxidized linseed oil acted as a mechanical barrier and could partially cover or block vessels, pits, and wood rays. Furthermore, the hydrophobicity of wood increased significantly after emulsion impregnation. However, there was no obvious chemical reaction between epoxidized linseed oil and the main components of wood in the Fourier transform infrared spectroscopy (FTIR) results. The combined effect of epoxidized linseed oil and carnauba wax was apparent in both decreased water absorption and dimensional deformation. Poplar wood impregnated with an epoxidized linseed oil/carnauba wax complex emulsion shows potential for improving water-related properties. Thus, the complex emulsion modification can improve the inherent shortcoming of poplar wood effectively.More than that, the hygroscopicity can be minimized by the decreased or covered hydroxy achieved via chemical modification of wood, such as acetylation [8], esterification [9], furfurylation [10], and so on. However, the chemical modifications might be somewhat environmentally unfavorable [11]. It is well-known that there is an increasing need for green and renewable materials, such as waxes and oils, derived from plants [12].Linseed oil (LO) is a hydrophobic, ecofriendly, non-expensive product derived from dried seeds of flax plant (Linum usitatissimum L.) [6]. As a drying oil, LO can block the lumen of the wood and form a stable LO film on pore surfaces after entering the interior of the wood by conventional impregnation techniques [13]. LO could reduce water uptake and increase biological resistance of wood [6,14]. Since no chemical linking is established between wood and oil, the LO impregnation could only reduce the water adsorption rate but not the final moisture content [15]. Furthermore, the oxidative polymerization of LO needs extensive time, resulting in oil to exude from the wood [16]. Linseed oil that has been epoxidized (ELO) may speed up oxidative polymerization [17]. Compared with wood treated with LO, ELO-treated wood has shown significant performance improvements in anti-swelling efficiency (ASE), water repellency, biodegradation resistance, and leaching resistance [18][19][20]. The main improvement mechanism of ELO-modified wood was correlated to the covalent bonding to the woo...

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Using iron catalyst to enhance the drying properties of crude tall oil-based wood preservative

Cited by 16 publications

References 3 publications

Preservación de la madera usando productos naturales

Preservación de la madera usando productos naturales

Thermal treatment of wood using vegetable oils: A review

Improved Water Repellency and Dimensional Stability of Wood via Impregnation with an Epoxidized Linseed Oil and Carnauba Wax Complex Emulsion

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