Effect of microwave heating on ph and termite resistance of Pinus roxburghii wood

Poonia, Pawan Kumar; Tripathi, Sadhna

doi:10.4067/s0718-221x2018005031901

Cited by 9 publications

(9 citation statements)

References 6 publications

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“…The Pinus sylvestris sapwood without treatment presented an average pH of 4.51, a result very close to that observed by [30], who verified a pH of 4.6 for untreated Pinus roxburghii wood.…”

Section: Phsupporting

confidence: 88%

Effect of the Citric acid on the Properties of Sapwood of Pinus sylvestris Submitted to Thermomechanical Treatment

Crisostomo,

Menezzi,

Militz

et al. 2023

Preprint

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The present study aimed to evaluate the effect of the citric acid on the properties of solid pine wood, which were submitted to thermomechanical treatment. A preliminary test was performed in a previous study to evaluate the influence of different temperatures of pressing and concentrations of citric acid over the physical properties of wood. After choosing the best treatments (170°C and 5% and 10% of citric acid) it was evaluated the effect of these on the chemical properties (SEM, FTIR and pH), on the density profile using an X-ray microtomography, and on the resistance to ageing through abrasion test. The result of the chemical analysis allowed to observe an increase of the presence of ester functional groups, as well as a better coverage and higher acidity of the surface. The density profile technique allowed to observe the formation of peaks of density on the surface where the acid was applied. Lastly, it was also possible to verify an increase in the resistance to abrasion because of the application of the citric acid.

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“…The Pinus sylvestris sapwood without treatment presented an average pH of 4.51, a result very close to that observed by [30], who verified a pH of 4.6 for untreated Pinus roxburghii wood.…”

Section: Phsupporting

confidence: 88%

Effect of the Citric acid on the Properties of Sapwood of Pinus sylvestris Submitted to Thermomechanical Treatment

Crisostomo,

Menezzi,

Militz

et al. 2023

Preprint

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“…This value was lower than that of earlier reported values such as 3.58% (Zanuncio et al 2015) and 3.50% (Backlund et al 2014). Value of the pH obtained was 5.07, which was close to those of earlier reported values of 5.5 reported by Iwakiri et al (2012), but higher than the values of 3.9 to 4.6, reported by Poonia and Tripathi (2018). The above differences between the values of the present study and the ones reported earlier may be due to species variation as the species used by the latter researchers are Pinus radiata (Zanuncio et al 2015) and Pinus contorta (Backlund et al 2014).…”

Section: Particle Sizesupporting

confidence: 78%

Studies on the durability of wood-cement particleboards produced with residues of Pinus spp., silica fume, and rice husk ash

Lima

Iwakiri

Satyanarayana

et al. 2020

BioRes

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Wood-cement composites were considered as substitutes for wood or asbestos cement. This research is focused on the development, characterization, and durability of different wood-cement particle boards composed of wood waste [residual particles of pine species (Pinus spp.)], with silica fume or rice husk ash. The wood-cement panels produced by cold compression were evaluated for their physical and mechanical properties after accelerated and natural weathering for 28 and 91 days of curing, respectively. Results indicate that the performance of wood-cement panels containing the Pinus spp. residue was comparable to that of lignocellulosic aggregate in wood cement panels. Pine residue wood panels exhibited high levels of pozzolanic activity, suggesting that silica fume or rice husk ash could be used as a partial substitute in Portland cement. There was a significant loss of mechanical properties over time with both the reference panel and the panel produced with pozzolana. Although there was no direct correlation between the values of accelerated weathering tests and natural weathering tests, there was a larger degradation of the panels after 20 cycles of the accelerated weathering than that after 12 months of natural weathering. Morphology studies supported the observed results.

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“…Pinus roxburghii wood was studied to determine the pH and the termite resistance of samples after MW treatment using four different intensities for 5 min [57]. Poonia and Tripathi [57] remarked that no cracks or checks were found in the MW-treated samples. The MC content of the samples diminished as the MW intensity increased.…”

Section: Speciesmentioning

confidence: 99%

State of the Art of Microwave Treatment of Wood: Literature Review

Mascarenhas

Dias

Christofóro

2021

Forests

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This paper presents a survey of the state of the art of microwave (MW) treatment of wood, informed by both past and recent research papers. It begins by introducing the main concepts regarding MW technology and its advantages, presenting a holistic perspective of this technology, and identifying 57 research papers published over the last 25 years. Next, an extensive literature review of the most significant experimental research papers is provided, divided into two MW heating treatment uses: wood drying and permeability improvement. For each study, the wood species, MW parameters, main objectives, and overall conclusions are provided. In this context, an explanation is given on how parameters such as MW power, frequency, intensity, and exposure time, as well as initial moisture content, influence the degree of wood modification. Next, a global overview of the most used wood species, genera, and dimensions is revealed. The paper concludes by indicating the potential fields of future research studies concerning the uses and applications of MW treatment technology.

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Effect of microwave heating on ph and termite resistance of Pinus roxburghii wood

Cited by 9 publications

References 6 publications

Effect of the Citric acid on the Properties of Sapwood of Pinus sylvestris Submitted to Thermomechanical Treatment

Effect of the Citric acid on the Properties of Sapwood of Pinus sylvestris Submitted to Thermomechanical Treatment

Studies on the durability of wood-cement particleboards produced with residues of Pinus spp., silica fume, and rice husk ash

State of the Art of Microwave Treatment of Wood: Literature Review

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