Mechanical behaviour of chemically modified Norway spruce (Picea abies L. Karst.): Experimental mechanical studies on spruce wood after methacrylation and in situ polymerization of styrene

Olaniran, Samuel Oluyinka; Michen, Benjamin; Méndez, Diego Fernando Mora; Wittel, Falk K.; Bachtiar, Erik Valentine; Burgert, Ingo; Rüggeberg, Markus

doi:10.1007/s00226-019-01080-5

Cited by 16 publications

(12 citation statements)

References 31 publications

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“…Both the hardness and compressive strength gradually increased with an increase in PF resin concentration, reaching the maximum of 54.9 N•mm −2 and 59.7 N•mm −2 with a concentration of 30%. The higher filling degree of the wood voids led to a higher density, which mainly contributed to the improved hardness and compressive strength after curing of the PF resin [41]. In addition, the increased mechanics of wood cell walls induced by the chemical modification also played an important role to achieve the desired modification effect.…”

Section: Micro-mechanics Of Wood Cell Wallsmentioning

confidence: 99%

Multi-Scale Evaluation of the Effect of Phenol Formaldehyde Resin Impregnation on the Dimensional Stability and Mechanical Properties of Pinus Massoniana Lamb.

Wang

Chen

Xie³

et al. 2019

Forests

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The local chemistry and mechanics of the control and phenol formaldehyde (PF) resin modified wood cell walls were analyzed to illustrate the modification mechanism of wood. Masson pine (Pinus massoniana Lamb.) is most widely distributed in the subtropical regions of China. However, the dimensional instability and low strength of the wood limits its use. Thus, the wood was modified by PF resin at concentrations of 15%, 20%, 25%, and 30%, respectively. The density, surface morphology, chemical structure, cell wall mechanics, shrinking and swelling properties, and macro-mechanical properties of Masson pine wood were analyzed to evaluate the modification effectiveness. The morphology and Raman spectra changes indicated that PF resin not only filled in the cell lumens, but also penetrated into cell walls and interacted with cell wall polymers. The filling and diffusing of resin in wood resulted in improved dimensional stability, such as lower swelling and shrinking coefficients, an increase in the elastic modulus (Er) and hardness (H) of wood cell walls, the hardness of the transverse section and compressive strength of the wood. Both the dimensional stability and mechanical properties improved as the PF concentration increased to 20%; that is, a PF concentration of 20% may be preferred to modify Masson pine wood.

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Section: Micro-mechanics Of Wood Cell Wallsmentioning

confidence: 99%

Multi-Scale Evaluation of the Effect of Phenol Formaldehyde Resin Impregnation on the Dimensional Stability and Mechanical Properties of Pinus Massoniana Lamb.

Wang

Chen

Xie³

et al. 2019

Forests

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“…Styrene is another highly valuable precursor, and has been traditionally used to synthesize different kinds of styrofoams. Some authors recently reported increased technical properties for WPC produced by in situ polymerization and in situ copolymerization, compared to their respective pristine woods [24,25]. Hadi and co-workers affirmed that the impregnation of wood parts with poly (styrene) (PS) may extend their service life, and the produced WPCs are safe to any living organism [26].…”

Section: Introductionmentioning

confidence: 99%

Termite Resistance of a Fast-Growing Pine Wood Treated by In Situ Polymerization of Three Different Precursors

Acosta

Labidi

Barbosa

et al. 2020

Forests

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This study aims to compare the resistance against subterranean termites of wood–polymer composites produced by in situ polymerization. The biological tests were carried out by choice and no-choice feeding tests. Poly (furfuryl alcohol), poly(styrene) and poly (methyl methacrylate) were studied here. They were impregnated into a Brazilian fast-growing pine wood using a vacuum:pressure method and then cured under simple heating. These treatments were evaluated using chemical (by infrared spectroscopy) and morphological (by scanning electron microscopy) analyses. The termite attack was evaluated by mass loss determination and photography. In general, all the treatments were effective in protecting the fast-growing pine wood. Results obtained by no-choice tests indicated that the treatment solution with 75% of furfuryl alcohol was less effective than the others, which indicates that both choice and no-choice tests may be important in a comprehensive study on the termites resistance of solid woods.

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“…En relación con estos resultados obtenidos en el módulo ruptura de flexión estática, exceden a los valores reportados para otras maderas blandas (Yildiz et al 2005, Cai et al 2007, Holloway et al 2010, Luo et al 2013, Sun et al 2016. En relación a los resultados del módulo de elasticidad de flexión estática, son mayores a los informados para otras maderas blandas (Yildiz et al 2005, Cai et al 2007, Holloway et al 2010, Luo et al 2013, Olaniran et al 2019. Los resultados obtenidos de la mejora en compresión paralela al grano, fueron iguales a las encontradas del 7 % y 8 % para otras maderas blandas (Yildiz et al 2005, Luo et al 2013, Sun et al 2016.…”

Section: Propiedades Mecánicasunclassified

“…Son varios los estudios con diferentes especies que han corroborado los aumentos de la estabilidad dimensional en la madera, mediante la impregnación de mezclas de agente hinchante de la pared celular de PEG 600 y PEG 1000 (Paz y Sanabria 2000, Jeremic et al 2007, Bjurhager et al 2010, Meints et al 2018, Ermeydan 2018. El tratamiento con la impregnación de PVA como agente de reticulación en la red porosa de la madera y polimerización en su estructura, causa un aumento en las propiedades mecánicas de flexión estática y compresión paralela al grano (Devi et al 2003, Yildiz et al 2005, Cai et al 2007, Li et al 2010, Holloway et al 2010, Zheng et al 2014, Tan et al 2015, Sun et al 2016, Kwak et al 2018, Solikhin et al 2018, Gadhave et al 2019, y una mejoría en la estabilidad dimensional (Alma et al 1996, Sun et al 2016, Olaniran et al 2019.…”

Section: Introductionunclassified

Incidencia de la impregnación de madera con alcohol polivinilico y polietilenglicol en algunas propiedades físicas y mecánicas de Pino oocarpa

Builes

Ananías

Osorio

2020

Maderas, Cienc. tecnol.

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La presente investigación se desarrolló con la madera Pinus oocarpa Schiede ex Schltdl. Var. Ochoterenai de plantación forestal de Colombia, especie que ha presentado inconvenientes importantes que han limitado su uso, debido a su inestabilidad dimensional y baja resistencia mecánica. Los tratamientos con impregnación de polímeros han permitido reducir las deformaciones, y mejorar las propiedades físicas y mecánicas. El objetivo de esta investigación fue evaluar el efecto de la impregnación de polietilenglicol con peso molecular 600 y 1500, alcohol polivinílico y adición de zeolita, sobre la densidad, estabilidad dimensional, flexión estática y compresión paralela al grano. Las muestras se impregnaron con baño caliente a 95 °C, durante 8 horas, y luego impregnados a temperatura ambiente, por 16 horas. La evaluación de la madera se llevó a cabo bajo las Normas Técnicas Colombianas NTC 290, 663, 784 y otros estándares de la literatura. Los mejores resultados se obtuvieron con la impregnación de polietilenglicol 1500; la densidad aumentó entre el 21 % y 24 %; la eficiencia anti-hinchazón fue de 60 %; en flexión estática aumentó el módulo ruptura 20 %, el módulo de elasticidad 39 % en compresión paralela al grano aumentó 8 %. El tratamiento con polietilenglicol 600 proporcionó una menor eficacia anti-hinchazón (14 %), y menor mejora en densidad (8 %) y en las propiedades mecánicas (1 % a 7 %). La impregnación con polímeros evidenció madera con mayor estabilidad dimensional y mejores propiedades físicas y mecánicas Palabras claves: Densidad, eficiencia anti-hinchazón, flexión estática, módulo de elasticidad, Pinus oocarpa, polímeros, tratamiento químico de madera.

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Mechanical behaviour of chemically modified Norway spruce (Picea abies L. Karst.): Experimental mechanical studies on spruce wood after methacrylation and in situ polymerization of styrene

Cited by 16 publications

References 31 publications

Multi-Scale Evaluation of the Effect of Phenol Formaldehyde Resin Impregnation on the Dimensional Stability and Mechanical Properties of Pinus Massoniana Lamb.

Multi-Scale Evaluation of the Effect of Phenol Formaldehyde Resin Impregnation on the Dimensional Stability and Mechanical Properties of Pinus Massoniana Lamb.

Termite Resistance of a Fast-Growing Pine Wood Treated by In Situ Polymerization of Three Different Precursors

Incidencia de la impregnación de madera con alcohol polivinilico y polietilenglicol en algunas propiedades físicas y mecánicas de Pino oocarpa

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