The impact of vacuum pressure on the effectiveness of SiO2 impregnation of spruce wood

Lemaire-Paul, Mathieu; Beuthe, Callisto Ariadne; Riahinezhad, Marzieh; Foruzanmehr, M. Reza

doi:10.1007/s00226-022-01448-0

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…To mitigate this issue and improve the effectiveness of the impregnation, the process was conducted under vacuum pressure using the Buehler Cast-N-Vac 1000 vacuum chamber. The most effective vacuum impregnation pressure was previously determined in our previous research to be -90 kPa [Lemaire-Paul et al 2022]. Accordingly, for this article, the samples were impregnated under negative pressures of -90 kPa for one hour.…”

Section: Impregnation Processmentioning

confidence: 99%

The study of physico-mechanical properties of SiO2-impregnated wood under dry and saturated conditions

Lemaire-Paul,

Foruzanmehr

2023

Wood Sci Technol

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This research has demonstrated that SiO 2 impregnation under high vacuum pressure of -90 kPa can signi cantly reduce porosity by almost 10%, and improve mechanical and viscoelastic properties of spruce wood under dry and saturated states. Characterization methods, such as Impact test, DMA, SEM, EDS, Porosity and SAXS tests were conducted on nontreated and -90 kPa treated spruce wood samples under dry, saturated and submerged states to analyze the synergistic effect of high vacuum SiO 2 impregnation pressure on wood's properties. The results showed that high vacuum impregnation pressure had a signi cant positive reinforcing effect on wood's properties. It increased the impact resistance of wood under dry and saturated conditions. Additionally, the high vacuum impregnation technique was able to overcome the water-induced softening effect and caused a signi cant increase in the Storage modulus through uniform dispersion of the SiO 2 particles in the wood's vascular structure. Consequently, the impregnation reinforced the wood, and ameliorated its capacity to absorb energy. High vacuum impregnation was also able to counteract the plasticizing effect of the water molecules and signi cantly increased the Loss modulus by increasing the internal friction and cohesion of the wood components with the addition of the nanoparticles to the vascular system, which increased the wood's capacity to transform and dissipate energy. Quantitatively and qualitatively, impregnation under a vacuum pressure of -90 kPa exhibited an effective obstruction of the vascular structure of spruce wood. In all conditions, high vacuum impregnated samples showed signi cant enhancements over non-treated samples. This research demonstrated that high vacuum SiO 2 impregnation is an effective wood processing techniques. Multiple materials and applications could bene t from this research wherein high strain-rate deformations is expected to occur or when simultaneous elastic behaviour of wood and its damping energy is needed. This study could also pave the way for research on the synergistic effect of SiO 2 impregnation and water absorption on the viscoelastic behaviour of wood.

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Section: Impregnation Processmentioning

confidence: 99%

The study of physico-mechanical properties of SiO2-impregnated wood under dry and saturated conditions

Lemaire-Paul,

Foruzanmehr

2023

Wood Sci Technol

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“…However, the alkalinity of silica sol may damage the wood structure during impregnation, resulting in a loss of performance. Adjusting the impregnation process parameters and increasing the silica sol particles can compensate for this negative effect [16]. Pressure also influences the impregnation effect.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Vacuum Impregnation Process on Water Absorption and Nail-Holding Power of Silica Sol-Modified Chinese Fir

Tao,

Liu,

2024

Forests

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The application of fast-growing Chinese fir (Cunninghamia lanceolata) is limited due to low dimensional stability and weak mechanical strength. Silica sol can effectively improve fast-growing fir wood’s physical and mechanical properties. In order to clarify the influence of impregnation process parameters on the modification effect, the effect of the vacuum impregnation variants (e.g., pre-vacuum time, pre-vacuum pressure, pressurization time, and pressurization pressure) was discussed using the orthogonal test approach. The optimal modification process was determined by comparing the water absorption and nail-holding power under different modification processes. The range analysis and variance analysis methods were used to study the correlation between process factors and the performance of the modified wood. The results showed that the water absorption and nail-holding power of fast-growing fir wood were significantly improved via vacuum impregnating with silica sol. The optimum process parameters for water absorption and nail-holding power of fast-growing fir as the pre-vacuum time was 30 min, the pre-vacuum pressure was −0.08 MPa, the pressurization time was 3 h, and the pressurization pressure was 1.2 MPa.

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Effects of Hydrolytic Aging on the Behaviour of Nano Silica (SiO2)-Treated Spruce Wood

Beuthe,

Foruzanmehr,

Riahinezhad

2024

RILEM Bookseries

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The impact of vacuum pressure on the effectiveness of SiO2 impregnation of spruce wood

Cited by 4 publications

References 22 publications

The study of physico-mechanical properties of SiO2-impregnated wood under dry and saturated conditions

The study of physico-mechanical properties of SiO2-impregnated wood under dry and saturated conditions

Effect of the Vacuum Impregnation Process on Water Absorption and Nail-Holding Power of Silica Sol-Modified Chinese Fir

Effects of Hydrolytic Aging on the Behaviour of Nano Silica (SiO2)-Treated Spruce Wood

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