Improving the UV and water-resistance properties of Scots pine (Pinus sylvestris) with impregnation modifiers

Lahtela, Ville; Kärki, Timo

doi:10.1007/s00107-014-0804-x

Cited by 12 publications

(14 citation statements)

References 30 publications

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“…This finding is the reverse of the situation found in the literature. In a previous study published by Lahtela and Karki, it was reported that the color in the SS sample increased more than in the control after a 300 hours accelerated aging test . In another study, it was found that sodium silicate, silicone, and tall oil alone did not have lignin protective effects.…”

Section: Resultscontrasting

confidence: 74%

Surface characterization of wood treated with boron compounds combined with water repellents

Can

Sivrikaya

2019

Color Research & Application

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Longer weathering exposure periods are more reliable for end‐use performance evaluations of wood surfaces. This study aimed to investigate the effect of boron impregnation on the surface composition and color of Scots pine (Pinus sylvestris L.) wood exposed to 18 months of natural weathering in the West Black Sea Region of Turkey. All measurements were performed at 6 month intervals. Samples were first impregnated with boron compounds and then for a second time using five different water‐repellent materials. Polyethylene glycol and aluminum sulfate were introduced with the boric acid as single impregnations. With increased weathering time, the samples darkened, while sodium silicate kept the color change to a minimum. Nano boron‐impregnated samples exhibited more effective results than those impregnated with boric acid. The FTIR analysis results demonstrated that the impregnation process had caused significant changes in the chemical structure of the samples. The changes in the chemical structure of the wood resulting from the impregnation process were partially maintained during the weathering.

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Section: Resultscontrasting

confidence: 74%

Surface characterization of wood treated with boron compounds combined with water repellents

Can

Sivrikaya

2019

Color Research & Application

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“…But there was no significant difference with control samples for both Scots pine and Uludag fir. In a similar study performed with water glass and tall oil treatments negatively affected thickness swelling compared to control samples (Lahtela and Karki 2014). In another study, when use of oil tangential swelling was reduce.…”

Section: Water Absorption and Dimensional Stabilitymentioning

confidence: 83%

“…Moisture content is a very effective way to protect the control timber. Environmentally friendly, biodegradable tall oil treatments are known for reducing the capillary water uptake (Tomak et al 2011, Kose et al 2014, Lahtela and Karki 2014.…”

Section: Introductionmentioning

confidence: 99%

“…Palm oil, soy oil, slack wax, rape oil, soybean oil, linseed and hemp oil have recently been studied more intensely for water reppellent, as well as tall oil resins (Homan and Jorissen 2004, Schulte et al 2004, Wang and Cooper 2005a, Spear et al 2006, Tomak et al 2010 Tall oil is obtained as a by-product from pulp and paper industry based on kraft process of wood when pulping mainly coniferous trees, and is a mixture of fatty acids, rosin acids, and unsaponifiable substances (Koski 2008, Lahtela andKarki 2014).…”

Section: Introductionmentioning

confidence: 99%

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Dimensional stabilization of wood treated with tall oil dissolved in different solvents

Can

Sivrikaya

2016

Maderas, Cienc. tecnol.

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Many water repellents, such as classic wood preservatives have the disadvantage of being harmful to the environment. Therefore, interest increased even eco-friendly, or of biodegradable material. Natural oils (tallow, linseed oil), appears to be capable of preventing the wood water uptake. However, the total amount of oil required to achieve a high penetration of the sapwood. The aim of this study was to investigate the water repellent efficiency of tall oil dissolved in different solvents. As solvents ethanol, methanol, acetone and tall oil water emulsions were used. Scots pine and Uludag fir sapwood samples were impregnated with tall oil formulations. For this purpose we used tall oil/solvents (W/W) at the concentrations of 10% and 20% respectively. Test samples cut into small sizes (20 x 20 x 10 ± 0,2 mm) for water uptake and tangential swelling tests. The tests were carried out based on American Wood Protection Association (AWPA) standard E4 (2003).

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“…Chemical modification of wood such as acetylation and silylation (Plackett et al 1992) bind chemicals to the cell wall polymers which can stabilise the wood colour (Rowell 2006;Baur and Easteal 2013;Lahtela and Kärki 2014). For example, Baur and Easteal (2013) used α-or γ-methacryloxysilanes and γ-epoxysilane to suppress free radical generation under UV exposure.…”

Section: Introductionmentioning

confidence: 99%

UV-protection of wood surfaces by controlled morphology fine-tuning of ZnO nanostructures

et al. 2016

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Abstract:One of the most significant limitations for a wider utilisation of the renewable and CO 2 -storing resource wood is its low ultraviolet (UV) light stability. The protection of the wood surface without altering its aesthetic appeal requires an optically transparent but UV protective coating which should be strongly attached to the rough and inhomogeneous substrate. For this purpose, ZnO nanostructures were deposited onto the wood surface via a chemical bath deposition process. The morphology of crystalline ZnO was controlled by aluminium nitrate or ammonium citrate in the growth step resulting in nanorod arrays or platelet structures, respectively. Detailed structural, chemical and mechanical characterisations as well as accelerated weathering exposure revealed the effective performance of the platelet structure, which formed a dense and thin ZnO coating on spruce. The total colour change (ΔE in the CIE system) was calculated to be 20.5 for unmodified wood, while it was about three for the modified samples after 4 weeks accelerated weathering test. Moreover, the ZnO coating also suppressed crack initiation and propagation indicating a substantial increase in durability.

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Improving the UV and water-resistance properties of Scots pine (Pinus sylvestris) with impregnation modifiers

Cited by 12 publications

References 30 publications

Surface characterization of wood treated with boron compounds combined with water repellents

Surface characterization of wood treated with boron compounds combined with water repellents

Dimensional stabilization of wood treated with tall oil dissolved in different solvents

UV-protection of wood surfaces by controlled morphology fine-tuning of ZnO nanostructures

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