Coating Performance on Oil-heat Treated Wood for Flooring

Nejad, Mojgan; Shafaghi, Romina; Ali, Hiba A.; Cooper, Paul A.

doi:10.15376/biores.8.2.1881-1892

Cited by 23 publications

(28 citation statements)

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“…Weaker adhesion under moist conditions can result from the uptake of moisture in the coating, swelling, and hygroscopic stress (de Meijer et al 1998;Sonmez et al 2011). Surface treatment by impregnation with nano-silver suspensions alters the porous structure of solid wood and the adhesion strength of coatings and paints (de Moura et al 2013;Nejad et al 2013;Taghiary and Samadarpour 2015).…”

Section: Introductionmentioning

confidence: 99%

Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

Salca¹,

Krystofiak²,

Lis³

et al. 2016

BioResources

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The objective of this study was to evaluate the adhesion strength and glossiness of black alder wood (Alnus glutinosa Gaertn. L.) coated with water-borne and UV varnishes by two application systems. Prior to coating, the samples were prepared by sanding with four combinations of grit size sandpapers, 180 being the final grit. The surface quality of the specimens was measured with a white light profilometer. Any increase in grit size gradually reduced surface roughness, which further influenced the overall coating performance of the samples. UV varnish applied by roller presented higher adhesion strength and gloss as compared to spraying. The specimens varnished with a water-borne finish by spraying exhibited a better adherence to the substrate than those of UV varnished samples by the same method and provided glossiness at 60° geometry in the same range. These results are valuable for the furniture manufacturing industry for generating a better use and efficiency of secondary wood resources in order to achieve value-added products.

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Section: Introductionmentioning

confidence: 99%

Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

Salca¹,

Krystofiak²,

Lis³

et al. 2016

BioResources

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“…The most important benefit of the thermal modification process is the improved dimensional stability of the wood [26,33,34]. The chemical changes that occur during heat treatment such as reduced hydroxyl content and higher degree of cellulose crystallinity [35] increase the hydrophobicity of wood, thereby improving the water repellence performance of coated heat-treated wood [36].…”

Section: Effects Of Wood Treatmentsmentioning

confidence: 99%

“…Some found that heat treatment reduced the surface energy of wood [35,62], and others reported improvements or no changes after modifications [63,64]. A few studies also observed reduced adhesion of coating to heat-treated woods in comparison with untreated woods [36,65]. However, what all researchers agree on is the lower water uptake of heat-treated due to the decrease in wood hygroscopicity after thermal modification [32,33,66].…”

Section: Coating Performancementioning

confidence: 99%

Exterior Wood Coatings

Nejad¹,

Cooper²

2017

Wood in Civil Engineering

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In addition to aesthetic appeal, coatings are designed to protect the wood from weathering degradation in outdoor conditions. This chapter gives an overview of the effects of the main coating components, coating properties, wood properties and treatments on coated wood performance in service. Understanding how different type of resins, pigments, solvents, and other major additives affect coating performance on wood, helps coating formulators to develop more durable coatings. It is beneficial for both wood scientists and coating chemists to learn which properties of coatings have the highest impact on predicting their service lives when exposed to weathering. For instance, measuring glass transition temperature (Tg) defines the degree of flexibility of a coating. Since wood swells and shrinks due to moisture uptake and subsequent drying, flexibility of a coating plays a critical role in defining its durability on wood in exterior conditions. Similarly, learning how preservative treatment or a new modification technique changes the surface properties of wood will help coating formulators to adjust properties of coatings in way that would have better adhesion and performance on that specific modified wood. Also, the effects of these factors in increasing service life of exterior wood coatings are discussed.

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“…Esse fato exige que sejam buscadas novas aplicações para esse subproduto, de forma a equilibrar o balanço entre oferta e demanda. Uma possível utilização da glicerina poderá ser no tratamento térmico de madeira, substituindo o óleo vegetal comumente utilizado em países da Europa (Nejad et al, 2013).…”

Section: Tratamentos Térmicosunclassified

Tratamento térmico da madeira em atmosfera de glicerina

et al. 2017

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O presente estudo visou avaliar tratamentos térmicos na madeira sob atmosfera de glicerina, que é resíduo da indústria de biodiesel, além de direcionar o produto obtido para os nichos de mercado da indústria madeireira. Foram selecionadas seis árvores de Eucalyptus grandis e E. cloeziana provenientes de plantios homogêneos com 21 anos. Dessas, foram confeccionados os corpos de prova e encaminhados para um banho de óleo laboratorial contendo glicerina bruta pré-aquecida a 50 °C. Os tratamentos consistiram no aquecimento da madeira em atmosfera de glicerina a 125 °C e 165 °C, por 30 min, além das amostras controle. Na sequência, foi quantificada a variação percentual de massa, o teor de umidade de equilíbrio e a absorção máxima de água. Ainda, foram quantificados os parâmetros colorimétricos, conforme o sistema CIEL*a*b*. Foi utilizado delineamento inteiramente casualizado, com duas temperaturas, e o tratamento controle. A utilização da glicerina na termorretificação reduziu o teor de umidade de equilíbrio e provocou o escurecimento superficial da madeira. Entretanto, a madeira tratada apresentou restrições de uso em contato com a água, podendo ser utilizada em ambientes internos.

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Coating Performance on Oil-heat Treated Wood for Flooring

Cited by 23 publications

References 0 publications

Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

Some Coating Properties of Black Alder Wood as a Function of Varnish Type and Application Method

Exterior Wood Coatings

Tratamento térmico da madeira em atmosfera de glicerina

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