Combined effects of ZnO particle deposition and heat treatment on dimensional stability and mechanical properties of poplar wood

Cui, Wei; Zhang, Nannan; Xu, Min; Cai, Liping

doi:10.1038/s41598-017-10606-5

Cited by 13 publications

(10 citation statements)

References 29 publications

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“…S8d) that heat treatment of bamboo in tung oil at <140 °C did not affect the breaking toughness significantly, until the temperature reached over 180 °C. It is known that the connection of glucomannan in hemicelluloses to the surface of the cellulose is mainly based on hydrogen bonds, while, to some extent, lignin is covalently bound to hemicelluloses 49,50 . The chemical composition results (Table S3) showed that partial hemicellulose were degraded by tung oil heat treatment, resulting in weakening the flexible connections among the different composition in the cell walls, which might be the main reason for the decrease in breaking toughness.…”

Section: Resultsmentioning

confidence: 99%

Synergistic effects of tung oil and heat treatment on physicochemical properties of bamboo materials

Tang

Zhang

Liu³

et al. 2019

Sci Rep

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The search for green and sustainable modification method to produce durable bamboo materials remains a challenge in industry. Here, heat treatment in tung oil at 100–200 °C was employed to modify bamboo materials. Oil permeation and distribution in the structure of bamboo samples during heat treatment were explored. The synergistic effects of tung oil and heat treatment on the chemical, physical and mechanical properties of bamboo materials, and their mutual relationships were also investigated in detail. Results showed that the tung oil heat treated bamboo not only had an enhanced hydrophobic property and dimensional stability, improved fungi resistance, but also displayed good mechanical performance. Compared with the untreated sample, the water-saturated swelling reduced from 3.17% to 2.42% for the sample after oil heat treatment at 200 °C, and the contact angles of the sample after oil heat treatment at 200 °C can keep >100° after 300 s in radial direction. Such improvement can be attributed to changes of chemical components, increased crystallinity structure, and the formation of oily films inside or over the bamboo surface. Therefore, tung oil heat treatment can be a highly promising technology for bamboo modification in the industry.

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Section: Resultsmentioning

confidence: 99%

Synergistic effects of tung oil and heat treatment on physicochemical properties of bamboo materials

Tang

Zhang

Liu³

et al. 2019

Sci Rep

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“…However, under 83% RH, the volumetric swelling rate of Sub 180°C specimens was similar to the of Control 180°C specimens. Cui et al (2017) studied the dimensional changes of ZnO composite heat treatment wood under 65% RH, finding that it had 1.6% tangential and 2.2% volumetric swelling. In this study, the swelling rate of Sub 180 °C wood under 60% RH was lower than the aforementioned ZnO composite heat treatment modified wood.…”

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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“…However, when thermal treatment is applied, the density and mechanical resistance of the wood decrease due to thermal degradation and mass loss. The amount of reduction in these properties depends on parameters such as the thermal treatment method, application time, temperature, and the anatomical structure of the wood (Boonstra et al 2007;Korkut et al 2008;Cui et al 2017;Pelit et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Surface roughness of thermally treated wood cut with different parameters in CNC router machine

Pelit

Korkmaz

Budakçı

2021

BioRes

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The effects of different machining parameters on surface roughness values of thermally treated pine, beech, and linden woods cut in a computer numerical control (CNC) router machine were examined. Wood specimens were thermally treated at 170, 190, and 210 °C for 2 h. Then, specimens were cut in the radial and tangential directions with three different spindle speeds (12000, 15000, and 18000 rpm) and three different feed rates (3000, 4000, and 6000 mm/min) using two different end mill tools (spiral and straight) on the CNC machine. The end mill type significantly affected the roughness values of the untreated and thermally treated specimens in both directions. Lower roughness values were found in the specimens (especially pine) machined with the straight end mill compared to those machined with the spiral end mill. Roughness generally decreased in the thermally treated specimens. However, thermal treatment temperature did not have a notable effect on roughness. As the spindle speed increased, the roughness values of all specimens decreased. In contrast, as the feed rate increased, the roughness values increased. Therefore, the end mill type, feed rate, and spindle speed were the most influential parameters on the roughness.

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Combined effects of ZnO particle deposition and heat treatment on dimensional stability and mechanical properties of poplar wood

Cited by 13 publications

References 29 publications

Synergistic effects of tung oil and heat treatment on physicochemical properties of bamboo materials

Synergistic effects of tung oil and heat treatment on physicochemical properties of bamboo materials

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

Surface roughness of thermally treated wood cut with different parameters in CNC router machine

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