Thermally initiated solvent-free radical modification of beech (Fagus sylvatica) wood

Mamiński, M.; Król, Magdalena; McDonald, Armando G.; McIlroy, David N.; Niraula, Ishwar; Czechowska, Joanna; Parzuchowski, Paweł G.

doi:10.1007/s00226-013-0555-6

Cited by 11 publications

(7 citation statements)

References 33 publications

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“…As a result, treated Jabon wood with PME22 and PME33 look much darker than untreated samples. A decrement of L* after in situ polymerization treatments was also observed by Mamiński et al (2013) who treated beech wood with butyl acrylate and butyl methacrylate and Mattos et al (2016) who impregnated Pinus taeda and Schizolobium parahybum woods in a vacuum/pressure system and polymerized in an oven at 90°C for 10h, using benzoyl peroxide.…”

Section: Utsupporting

confidence: 56%

Colour changes and morphological performance of impregnated jabon wood using polymerised merbau extractives

Malik

Ozarska

Santoso

2018

Maderas, Cienc. tecnol.

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Section: Utsupporting

confidence: 56%

Colour changes and morphological performance of impregnated jabon wood using polymerised merbau extractives

Malik

Ozarska

Santoso

2018

Maderas, Cienc. tecnol.

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“…Guapuruvu wood presented the highest decrement of lightness. A decrement of L* after in situ polymerization treatments was also observed by Mamiński et al (2013), who treated beech wood with butyl acrylate and butyl methacrylate.…”

Section: Color Evaluationmentioning

confidence: 88%

“…Nevertheless, not much is known about the colorimetric properties of these materials. Furthermore, studies on the topic are scarce (Mamiński et al 2013), even considering the potential applications of these materials for commercial aesthetic products.…”

mentioning

confidence: 99%

“…The CIEL*a*b* method has been widely applied in other research to evaluate changes in wood color (Cademartori et al 2014, Hu et al 2012, Mamiński et al 2013, Tuong and Li 2010, though UVVisible spectrophotometry and specular gloss tests are also good tools to assist in color evaluation and, consequently, to provide more accurate information about the aesthetic properties of wood and its composites (Butylina et al 2013, Obaid et al 2013.…”

mentioning

confidence: 99%

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Color changes of wood from Pinus taeda and Schizolobium parahybum treated by in situ polymerization of methyl methacrylate using cross-linkers

Mattos

Missio

Cademartori

et al. 2016

Maderas, Cienc. tecnol.

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The aim of this study was to evaluate the colorimetric properties of Pinus taeda and Schizolobium parahybum woods treated by in situ polymerization. The wood samples were impregnated in a vacuum/ pressure system and polymerized in an oven at 90°C for 10h, using benzoyl peroxide at 1,5wt% as the catalyst. The treatments were characterized using attenuated total reflectance infrared (ATR-IR) spectroscopy and weight percentage gain (WPG). The color evaluation was performed using CIEL*a*b* concepts, specular gloss, and UV-Visible spectrophotometry. Treated woods showed increases in band intensity related to polymers (1730, 1460 and 1145 cm -1 ), and WPG ranged from 39 to 164%, depending of the wood species and treatments. Lightness decreased, while the Chroma, gloss and the color coordinates increased. A darkening of the all treated samples was observed, and confirmed by the decrease in the reflectance intensity between 400 and 700 nm.

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“…Entretanto, no compósito MMA o ângulo de contato inicial foi de ~90°, com uma ligeira diminuição ao final do ensaio, permanecendo entre 80-85° (Figura 4). Resultados semelhantes a estes foram observados por Mamiński et al [35] em compósitos confeccionados pelo tratamento da madeira de Beech (Fagus sylvatica L.) com butil metacrilato e butil acrilato, e também por Li et al [30] para compósitos de Poplar (Populuss ussuriensis Korn) confeccionados via polimerização in situ de poli(MMAco-estireno). Evidenciou-se que mesmo com polímeros sem afinidade química com a madeira, é possível aumentar significativamente a hidrofobicidade superficial da madeira.…”

Section: Higroscopicidade Hidrofobicidade E Estabilidade Dimensionalunclassified

Compósitos polímero-madeira preparados por polimerização in situ de metil metacrilato usando aditivos bifuncionais

et al. 2015

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ResumoO presente trabalho teve por objetivo a confecção de compósitos polímero-madeira por meio de polimerização in situ de metil metacrilato (MMA), utilizando ácido metacrílico (MAA) e glicidil metacrilato (GMA) como agentes de ligação e reticulação. Amostras de madeira de guapuruvu foram impregnadas em um sistema de vácuo e pressão e polimerizadas em estufa a 90°C por 10h, usando 1,5% de peroxido de benzoíla como catalisador. Os compósitos foram caracterizados por meio de testes de absorção de água e estabilidade dimensional, molhabilidade, ATR-IR, TGA, MEV e WPG. Os espectros de ATR-IR mostraram incrementos nas bandas a 1746, 1460, e 1145 cm -1 , referentes as estruturas químicas dos polímeros dentro da madeira, confirmado posteriormente pelas imagens de MEV. A termogravimetria apontou reações químicas entre os copolímeros e a parede celular da madeira nos compósitos com GMA e MAA. Os compósitos preparados com MMA apresentaram incrementos acima de 50% nas propriedades higroscópicas e de estabilidade dimensional, entretanto a adição de GMA e MAA resultou em maiores incrementos nas mesmas propriedades, entre 66-90%. Palavras-chave: polimerização por radicais livres, Schizolobium parahyba, catálise térmica, reticulantes, agentes de ligação. AbstractWe prepared wood/polymer composites by in situ polymerization of methyl methacrylate (MMA) using glycidyl methacrylate (GMA) and methacrylic acid (MAA) as cross-linkers and coupling agents. The guapuruvu wood samples were impregnated in a vacuum/pressure system and polymerized at 90 °C for 10 h, using benzoyl peroxide at 1.5 wt % as catalyst. We characterized the composites through water uptake, dimensional stability tests, wettability, ATR-FTIR spectroscopy, TGA, SEM, and WPG. ATR-FTIR spectra showed an increase of the peaks at 1746, 1460, and 1145 cm -1 , corresponding to the chemical structures of the polymers into the pores and capillaries of the wood. This was further confirmed in the SEM images. TGA curves showed evidences for a chemical interaction between the copolymer and the wood cell wall in the composites with GMA and MAA. Hygroscopicity and dimensional stability properties of the composites prepared with MMA improved by 50%. Nevertheless, the addition of GMA and MAA resulted in additional increases for hydrophobicity and dimensional stability of the samples, ~ 66 -90%.

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Thermally initiated solvent-free radical modification of beech (Fagus sylvatica) wood

Cited by 11 publications

References 33 publications

Colour changes and morphological performance of impregnated jabon wood using polymerised merbau extractives

Colour changes and morphological performance of impregnated jabon wood using polymerised merbau extractives

Color changes of wood from Pinus taeda and Schizolobium parahybum treated by in situ polymerization of methyl methacrylate using cross-linkers

Compósitos polímero-madeira preparados por polimerização in situ de metil metacrilato usando aditivos bifuncionais

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