Caffeine – Perspective natural biocide for wood protection against decaying fungi and termites

Šimůnková, Kristýna; Reinprecht, Ladislav; Nábělková, Jana; Hýsek, Štěpán; Kindl, Jiří; Borůvka, Vlastimil; Lišková, Tereza; Šobotník, Jan; Pánek, Miloš

doi:10.1016/j.jclepro.2021.127110

Cited by 23 publications

(24 citation statements)

References 31 publications

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“…However, its application on wood has never been tested yet. In contrast, caffeine has been studied quite intensively in recent years (Ratajczak et al 2018;Broda et al 2018;Kwasniewska-Sip et al 2018;Kwasniewska-Sip et al 2019;Pánek et al 2020;Šimůnková et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…The effect of application temperature on a possible subsequent biological attack has not been analyzed either. All mentioned studies were performed at the prescribed laboratory temperature (20 ± 2) °C or the temperatures required for the growth of organisms (20 to 35) °C or the performance of experiments was conducted according to standardized procedures or during successive cycles of accelerated aging in a climatic chamber (Ratajczak et al 2018;Broda et al 2018;Kwasniewska-Sip et al 2018;Kwasniewska-Sip et al 2019;Kobetičová et al 2020;Pánek et al 2020;Šimůnková et al 2021).…”

Section: Introductionmentioning

confidence: 99%

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Influence of selected storage temperatures on wood properties and its biological resistance after the use of methylxanthines

Kobetičová

Böhm

Nábělková

et al. 2021

BioRes

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Methylxanthine’s fungicidal properties were investigated, with attention to the temperature of treatment. Caffeine and theophylline treatments of beech and spruce woods were applied for three months in the temperature range of -20 to 40 °C, simulating potential weather conditions in the European region and temperatures specific for various wood applications (cellars, wine cellars, room indoor temperatures, interior trusses). Effects of the selected temperatures were considered without the influence of the other possible factors, which have been considered in previous studies (e.g. effects of temperature in combination with other factors such as UV radiation, humidity, and chemical or biological degradation). Then, the specimens were exposed to a mix of molds and fungi for three months under controlled laboratory conditions in order to analyze a possible subsequent biological attack. The results did not show any effect of temperature of the methylxanthine treatment within the studied range on the organismal activity. Caffeine exhibited a better protective potential than theophylline and was more effective for spruce than for beech. The results indicated the suitability of caffeine for protection of spruce and spruce-based materials in interior applications at a stable temperature without significant effects of UV and humidity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of selected storage temperatures on wood properties and its biological resistance after the use of methylxanthines

Kobetičová

Böhm

Nábělková

et al. 2021

BioRes

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“…Tests of biocidal activity against wood-destroying fungi were initially performed by the poisoned nutrient soil methods [6], subsequently also verified on treated wood bodies [7,12]. Lightly permeable types of pine and beech wood and the method of vacuum impregnation [7,11,12] were used in most cases, but efficiency on hard-to-permeate spruce wood was also verified using long-term dipping technology [13]. Caffeine was effective against the growth of wood-destroying white and brown rot fungi [6][7][8]10,12,14] and was also tested on wooden specimens for mould growth [15].…”

Section: Introductionmentioning

confidence: 99%

“…So far, a 2% caffeine solution was tested as an effective concentration, whereas tests using lower concentrations that would reduce the cost of the used protection [1,16] are lacking. The weakness of caffeine as a natural biocide for wood protection is its washability by water [13], in which, according to research works [8,17], it only forms weak bonds. The increase in the biocidal efficiency of caffeine was investigated using subsequent heat treatment [15] and the water washability was reduced using hydrophobic treatments [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…The weakness of caffeine as a natural biocide for wood protection is its washability by water [13], in which, according to research works [8,17], it only forms weak bonds. The increase in the biocidal efficiency of caffeine was investigated using subsequent heat treatment [15] and the water washability was reduced using hydrophobic treatments [12,13]. In addition to the longterm protection of built-in products, the use of caffeine as a method of short-term protection of lumber and semi-finished products is also offered, for which the biggest risk is not only the studied moulds [15] and insects [13], but also wood-staining fungi [1].…”

Section: Introductionmentioning

confidence: 99%

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Efficacy of Caffeine Treatment for Wood Protection—Influence of Wood and Fungi Species

et al. 2021

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In the future, we can expect increased requirements to the health and ecological integrity of biocides used for the protection of wood against bio-attacks, and it is therefore necessary to search for and thoroughly test new active substances. Caffeine has been shown to have biocidal efficacy against wood-destroying fungi, moulds and insects. The aim of the research was to determine whether the effectiveness of caffeine, as a fungicide of natural origin, is affected by a different type of treated wood. Norway spruce mature wood (Picea abies), Scots pine sapwood (Pinus sylvestris), and European beech wood (Fagus sylvatica) were tested in this work. The samples were treated using long-term dipping technology or coating (according to EN 152:2012) and then tested against selected wood-destroying brown rot fungi according to the standard EN 839:2015, wood-staining fungi according to EN 152:2012, and against mould growth according to EN 15457:2015. The penetration of caffeine solution into wood depth was also evaluated using liquid extraction chromatography, as well as the effect of the treatment used on selected physical and mechanical properties of wood. The test results showed that the type of wood used and the specific type of wood-degrading agent had a significant effect on the effectiveness of caffeine protection. The most resistant wood was the treated spruce, whereas the most susceptible to deterioration was the treated white pine and beech wood. The results of the work showed that caffeine treatment is effective against wood-destroying fungi at a concentration of 2%, and at 1% in some of the tested cases. It can be used as an ecologically acceptable short-term protection alternative against wood-staining fungi in lumber warehouses and is also partially effective against moulds. It also does not have negative effects on changes in the physical and mechanical properties of the tested wood species.

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Application of Nanomaterials for Wood Protection

Khadiran

Jasmani²,

Rusli³

2022

Emerging Nanomaterials

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Caffeine – Perspective natural biocide for wood protection against decaying fungi and termites

Cited by 23 publications

References 31 publications

Influence of selected storage temperatures on wood properties and its biological resistance after the use of methylxanthines

Influence of selected storage temperatures on wood properties and its biological resistance after the use of methylxanthines

Efficacy of Caffeine Treatment for Wood Protection—Influence of Wood and Fungi Species

Application of Nanomaterials for Wood Protection

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