Montan wax improves performance of boron-based wood preservatives

Lesar, Boštjan; Kralj, Polona; Humar, Miha

doi:10.1016/j.ibiod.2008.10.006

Cited by 37 publications

(18 citation statements)

References 12 publications

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“…It was obvious that as a water repellent, a higher proportion of wax in the ACQ preservative influenced the rate of water uptake and thus reduced copper leaching. The result was consistent with some previous studies (Lesar et al 2009;Wang 2015b), which indicated that the higher leaching resistance of preservative was attributable to the hydrophobic film formed by the wax in the treated wood during hot temperature treatment.…”

Section: Leaching Performance Analysissupporting

confidence: 93%

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Evaluation of the Dimensional Stability and Leaching Performance of ACQ/Wax Treated Southern Pine

Yu¹,

Tang²,

Wei³

et al. 2016

BioResources

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Southern pine (Pinus sp.) wood cubes were treated with ACQ solutions with wax modification and post-treated at 70 °C for 10 h with hot air circulation. The effects of wax concentrations in ACQ-treated southern pine on its dimensional stability and copper leaching performance were investigated. The ACQ/wax-treated wood exhibited improved water resistance during the water soak process. The testing of swelling and shrinkage performance of the treated wood showed that samples with a higher percentage of wax had higher resistance to water swelling and shrinkage. The samples with a lower percentage of wax addition had only a slight effect on the moisture swelling and shrinkage resistance. As a result, copper leaching from ACQ/wax-treated wood with a 2% wax concentration was reduced to a lower level compared to ACQ-treated wood. When the proportion of wax in ACQ preservative was less than 1%, a higher percentage of copper was leached from treated wood.

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Section: Leaching Performance Analysissupporting

confidence: 93%

“…It can be used to lower the moisture content so that decaying processes are no longer possible (Goethals and Stevens 1994). Montan wax emulsion and boric acid act synergistically against wood decay fungi, and they decrease boron leaching from impregnated specimens from 50% to 20% (Lesar et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Dimensional Stability and Leaching Performance of ACQ/Wax Treated Southern Pine

Yu¹,

Tang²,

Wei³

et al. 2016

BioResources

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“…Therefore, several fixation systems to limit or decrease boron leachability from treated wood have been developed. For example a combination of boron with: glycerol/glyoxal, vinyl monomers, silanes, alkydes, tall oil derivates, protein, water repellent compound, liquefied wood, and montan wax emulsions (Köse et al, 2011;Obanda et al, 2008;Lesar et al, 2009Lesar et al, , 2012Sen et al, 2009;Temiz et al, 2008;Tomak et al, 2011). However, due to the high costs or a two-step treatment, the above-mentioned approach could have not been deployed in practice.…”

Section: Introductionmentioning

confidence: 99%

Effects of Rosin Sizing Agent on the Fixation of Boron in <i>Styrax tonkinensis</i> Wood

Nguyen¹,

2017

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Abstract:The aim of this study was to evaluate the effect of rosin upon fixing boron in Styrax tonkinensis (Piere) wood treated with mixtures of 3% boric acid and 1% rosin sizing agent. After treatment, wood samples were also analyzed by scanning electron microscope observation and energy-dispersive X-ray spectroscopy (SEM-EDX). The results showed that all boron-rosin formulations impregnated Styrax tonkinensis wood evenly penetrated into the wood blocks. Boron-rosin treatment decreased by 16% the amount of boron leaching from treated wood samples compared with those from the samples treated with boric acid alone. The SEM-EDX analysis proved that the boron element was still in the cell lumens of leached wood blocks. Results indicated that rosin emulsion sizing agent can have an effect on the fixation of boron in wood. This signifies that using of rosin as fixing agents may contribute to lead to wood treated with boron based preservatives being more widely used.

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“…One of the most important advantages of montan wax is its capability of forming thin‐layer resistant films 13. Montan wax improves performance against wood decay fungi, but not sufficiently to be used for in‐ground applications 14. However, wood impregnated with the preservative solutions, based on the montan wax and the boron compounds, is well protected against wood decay fungi in above‐ground applications.…”

Section: Introductionmentioning

confidence: 99%

Sorption properties of wood impregnated with aqueous solution of boric acid and montan wax emulsion

Lesar

Straže

Humar

2010

J of Applied Polymer Sci

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Nonbiocidal techniques for wood protection have become more and more important in the last few years. One of the possible treatments to enhance wood durability is use of water repellents. In this research, the influence of one of the possible water repellents, the montan wax emulsion, on the moisturizing and the sorption characteristics of impregnated wood was investigated. To achieve a better protection against wood decay fungi, wood was impregnated with montan wax emulsion enriched with boric acid. The equilibrium moisture content (MC) was monitored during the adsorption and the desorption processes at five levels of relative air humidity (RH 1 ¼ 20%, RH 2 ¼ 33%, RH 3 ¼ 65%, RH 4 ¼ 88%, and RH 5 ¼ 98%). Water repellence efficiency was monitored in the chamber with high RH (87%) and during dipping in the water. Impregnated samples were also exposed outdoors in a covered position for 5 months to determine MC changes according to changes in outdoor humidity and temperature. The results showed that the sorption properties of the impregnated wood are strongly related to retention of preservative solutions after impregnation and its composition. Montan wax reduced equilibrium MC of the impregnated wood up to 25% (relatively), whereas specimens impregnated with combination of montan wax and boric acid resulted in decreased MC in some cases and in increased MC in some cases. The Guggenheim-Andersen-deBoer model of sorption isotherms was fitted to experimental data to explain the sorption mechanisms.

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Montan wax improves performance of boron-based wood preservatives

Cited by 37 publications

References 12 publications

Evaluation of the Dimensional Stability and Leaching Performance of ACQ/Wax Treated Southern Pine

Evaluation of the Dimensional Stability and Leaching Performance of ACQ/Wax Treated Southern Pine

Effects of Rosin Sizing Agent on the Fixation of Boron in <i>Styrax tonkinensis</i> Wood

Sorption properties of wood impregnated with aqueous solution of boric acid and montan wax emulsion

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Montan wax improves performance of boron-based wood preservatives

Cited by 37 publications

References 12 publications

Evaluation of the Dimensional Stability and Leaching Performance of ACQ/Wax Treated Southern Pine

Evaluation of the Dimensional Stability and Leaching Performance of ACQ/Wax Treated Southern Pine

Effects of Rosin Sizing Agent on the Fixation of Boron in &lt;i&gt;Styrax tonkinensis&lt;/i&gt; Wood

Sorption properties of wood impregnated with aqueous solution of boric acid and montan wax emulsion

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Effects of Rosin Sizing Agent on the Fixation of Boron in <i>Styrax tonkinensis</i> Wood