Effect of hemp oil impregnation and thermal modification on European beech wood properties

Baar, Jan; Brabec, Martin; Slávik, Richard; Čermák, Petr

doi:10.1007/s00107-020-01615-9

Cited by 22 publications

(22 citation statements)

References 56 publications

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Section: Resultsmentioning

confidence: 99%

“…The explanation of these relationships is similar that of TS. The study of effect of thermal modification on YM of thermal modified wood was conducted also by Baar et al and Xu et al [23,45] Baar et al additionally used hemp oil to impregnation beech wood samples. They noticed an increase in the modulus of elasticity, which was explained by the increased crystallinity of cellulose, due to the degradation of its amorphous part, and the cross-linking of lignin during modification.…”

Section: Mechanical Properties Of Wpcmentioning

confidence: 99%

“…They noticed an increase in the modulus of elasticity, which was explained by the increased crystallinity of cellulose, due to the degradation of its amorphous part, and the cross-linking of lignin during modification. [23] It is well known that the addition of fillers to the PP matrix causes a decrease in elongation at break (ε). So, as expected, there was a significant decrease in this parameter for all composite samples.…”

Section: Mechanical Properties Of Wpcmentioning

confidence: 99%

“…It is a relatively simple method of modification, and also fit well in the principles of ecology and the so-called "green chemistry". [14,18,[23][24][25] During thermal modification of wood, high temperature (110-260 C) causes oxidation, dehydration, and decarboxylation reactions of wood components. As a result of these occurs a decomposition of hemicellulose and a decrease in the degree of polymerization of cellulose and lignin.…”

Section: Introductionmentioning

confidence: 99%

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Influence of wood thermal modification on the supermolecular structure of polypropylene composites

Odalanowska

Borysiak

2021

Polymer Composites

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The thermal modification of wood can be an interesting way of improving adhesion in polymer composites, although the mechanical properties of composites with heat treated wood presented so far in many works arouse much controversy. In this work, effects of thermal modification of wood on the supermolecular structure and morphology of wood/polypropylene composites (WPC) were investigated using X-ray diffraction, hot stage optical microscopy,

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Section: Resultsmentioning

confidence: 99%

Section: Mechanical Properties Of Wpcmentioning

confidence: 99%

Section: Mechanical Properties Of Wpcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of wood thermal modification on the supermolecular structure of polypropylene composites

Odalanowska

Borysiak

2021

Polymer Composites

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“…Bulking of cell wall by SMs, better distribution of SMs within wood cell wall, and the degradation of hemicellulose after heat treatment, are supposed to be the reasons accounting for the most favorable dimensional stability of the Sub 180 °C treated wood. Baar et al (2021) (Xiao et al 2010). Compared with glutaraldehyde modified wood, that of Control 180 °C, Sub and Sub 180 °C modified wood could be considered as 0, suggesting the SMs just impregnated the cell wall and coated the inner surface of cell lumen without cross-linking with the cell wall substance in the Sub and Sub 180°C wood (Fig.…”

Section: Dimensional Stability Of the Specimensmentioning

confidence: 99%

Improving dimensional stability of Populus cathayana wood by suberin monomers with heat treatment

Zhang¹,

Ma²

2021

iForest

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This paper presents a wood modification method using renewable and nontoxic suberin monomers (SMs) under heat treatment to improve dimensional stability of wood from fast-growing species. Specimens of poplar (Populus cathayana) wood were impregnated with SMs and then subjected to heat treatment at 180°C for two hours. The untreated wood (Control), suberin monomers impregnated wood (Sub) and suberin monomers impregnated wood with heat treatment (Sub 180°C) were analyzed by scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), and Fourier transform infrared spectroscopy (FTIR). The hygroscopicity and dimensional stability of modified wood were evaluated. The results showed that SMs in the treated wood were located in the cell lumen of fibers and vessels, as well as in the cell wall which was bulked. The dimensional stability of SMs modified wood was improved, and this enhancement became more pronounced by a combination with heat treatment. The anti-swelling efficiency of Sub and Sub 180°C treatments were 30.0% and 49.6%, respectively. The presented results showed potential of SMs treatment to develop an effective modification approach and improve dimensional stability of wood of fast-growing species, as well as to promote the reuse of suberin from the bark.

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Understanding the effect of combined thermal treatment and phenol–formaldehyde resin impregnation on the compressive stress of wood

Zhang

Yang

et al. 2022

Wood Sci Technol

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Effect of hemp oil impregnation and thermal modification on European beech wood properties

Cited by 22 publications

References 56 publications

Influence of wood thermal modification on the supermolecular structure of polypropylene composites

Influence of wood thermal modification on the supermolecular structure of polypropylene composites

Improving dimensional stability of Populus cathayana wood by suberin monomers with heat treatment

Understanding the effect of combined thermal treatment and phenol–formaldehyde resin impregnation on the compressive stress of wood

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