Catalytic Acetylation of<i>Pinus radiata</i>(D. Don) with Limited Supply of Acetic Anhydride Using Conventional and Microwave Heating

Sethy, Anil Kumar; Vinden, Peter; Torgovnikov, G; Militz, Holger; Mai, Carsten; Kloeser, Lars; Przewloka, Simon

doi:10.1080/02773813.2011.573121

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…Microwave (MW) wood modification is an environmentally friendly modification technique with relatively low energy consumption [15] when compared to some other modification techniques, and supports various wood processing operations by significantly improving permeability, treatability, and uptake of wood preservatives [16][17][18][19][20][21][22]. Microwave treatment of wood is particularly useful for less permeable wood, as in this way we can improve the impregnability of the wood and achieve more effective protection to increase its resistance.…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Energy Intensities of Microwave Treatment on Heartwood and Sapwood Microstructures in Norway Spruce

Ganguly

Balzano

Petrič

et al. 2021

Forests

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Microwave modification can increase the permeability of wood by delaminating and rupturing its anatomical microstructures at their weak points. A high degree of intensity of microwave modification can cause significant structural damage to the microstructures of wood, resulting in poorer strength properties. The objective of this study was to evaluate the changes in the anatomical structure of Norway spruce (Picea abies (L.) Karst.) heartwood and sapwood after microwave modification in order to develop the most effective treatment in terms of applied energy without causing significant structural damage. Analysis with light and scanning electron microscopy were performed to evaluate the effect of microwave treatment for two different energy intensities, moderate and high intensity. The results indicated structural changes in the tracheid cells. Microscopy showed varying degrees of modification within the wood microstructure, with the heartwood samples showing a greater anatomical distortion compared to their sapwood counterparts. Furthermore, the samples were subjected to pycnometric density measurements, which indicated a reduction in skeletal and absolute density after microwave modification, for both high and moderate intensity treatment on sapwood and heartwood samples. With increasing microwave energy, a gradual increase in specific pore volume and porosity percentage of the samples were also detected.

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Section: Introductionmentioning

confidence: 99%

Effects of Different Energy Intensities of Microwave Treatment on Heartwood and Sapwood Microstructures in Norway Spruce

Ganguly

Balzano

Petrič

et al. 2021

Forests

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“…A laboratory MW device has been introduced (Brodie 2004;2007;Dömény et al 2014;Hansson and Antti 2003;Hansson et al 2005;Harris et al 2011;Sethy et al 2012;Sugiyanto et al 2010;Zhao et al 1998). A device for industrial applications has also been presented (Torgovnikov and Vinden 2004;Vinden et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Microwave Device for Continuous Modification of Wood

Koiš¹,

Dömény²,

Tippner³

2014

BioResources

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The aims of this study were to introduce a new laboratory microwave device developed for the modification of wood properties and to examine the effect of microwave radiation on moisture loss, surface temperature, and mechanical properties (the static modulus of elasticity-MOE, and the modulus of rupture-MOR) of Norway spruce (Picea abies). The device was developed for a continuous modification process. The microwave (MW) generator works at a frequency of 2450 MHz, and the adjusted output ranges from 0.6 to 6 kW. The experiment was based on four different modes of MW modification, each of them with a varied generator output and conveyor speed. Regarding mechanical properties, the results showed that a feasible output for the MW modification of the samples was up to 3 kW, with a conveyor speed of around 0.4 m/min. The greatest moisture loss, approximately 40%, was found in the group treated at 5 kW and 0.2 m/min. The highest surface temperature, 87 °C, was measured in the group treated at 5 kW and 0.4 m/min after the second passage through the modification chamber.

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“…Sethy AK, et al [30], utilized microwave drying to uniformly dry the Pinus radiata sample (20 × 20 × 20 mm 3 ) across its thickness, resulting in a decreased level of drying stress. Furthermore, even at low moisture content levels as low as 6%, no surface or end checks were observed in the dried samples.…”

Section: Impact Of Microwave Treatment On Strength Propertiesmentioning

confidence: 99%

Effect of Microwave Treatment on Strength and Permeability of Wood: A Snapshot Review

Sharma,

Kumar

2023

J Biomed Res Environ Sci

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Microwave treatment is a promising technique for modifying the properties of wood. It has gained popularity as an alternative method to conventional treatments for improving the properties of wood. Microwave drying has shown that it reduces the drying stresses and improve the quality of wood compared to traditional drying methods. This efficient heating reduces the risk of deformation, cracking, and other defects that can occur with prolonged exposure to high temperatures during traditional drying and also helps in increasing the permeability of wood. This snapshot review provides an overview of the effect of microwave treatment on the strength properties and permeability of wood with variations in parameters such as the frequency, power, and treatment time along with the potential benefits and drawbacks of this method. Overall, the review indicate that microwave treatment is an effective method for modifying the properties of wood and has the potential to improve its performance in various applications.

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Catalytic Acetylation ofPinus radiata(D. Don) with Limited Supply of Acetic Anhydride Using Conventional and Microwave Heating

Cited by 6 publications

References 9 publications

Effects of Different Energy Intensities of Microwave Treatment on Heartwood and Sapwood Microstructures in Norway Spruce

Effects of Different Energy Intensities of Microwave Treatment on Heartwood and Sapwood Microstructures in Norway Spruce

Microwave Device for Continuous Modification of Wood

Effect of Microwave Treatment on Strength and Permeability of Wood: A Snapshot Review

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