Study of Interactions between Titanium Dioxide Coating and Wood Cell Wall Ultrastructure

Svora, Petr; Pawełkowicz, Sylwia Svorová; Ecorchard, Petra; Plocek, Jiřı́; Schieberová, Alena; Prošek, Zdeněk; Ptáček, Petr; Pošta, Jan; Targowski, Piotr; Kuklík, P.; Jakubec, Ivo

doi:10.3390/nano12152678

Cited by 3 publications

(4 citation statements)

References 41 publications

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“…The addition of the TiO2-NPs is evidenced by a thin layer of white coating material on the surface of the wood in Figure 12c-e. This white coating possibly indicates the presence of a layer of TiO2 as a coating material, as reported by Svora et al [63]. Figure 12f-i show the coating treatment comprising an oil-based varnish material and different concentrations of TiO2-NPs for the V1, V1-CT1, V1-CT5, and V1-CT10 coatings, respectively.…”

Section: Microscopic and Macroscopic Mangium Woodsupporting

confidence: 67%

“…Based on the microscopic and macroscopic results, only a small portion was observed, as described above. According to Svora et al [63], most research on TiO 2 as a wood preservative or wood quality improvement material shows results in the form of changes in colour or mechanical properties, but little is known about the microscopic and molecular changes that occur.…”

Section: Microscopic and Macroscopic Mangium Woodmentioning

confidence: 99%

“…This could be due to the absence of protection from the active ingredients of TiO 2 -NPs against UV radiation and organic pollutants, which could accelerate wood degradation. Wood degradation can be initiated by lignin, which is very sensitive to UV radiation [63] and is characterised by a decrease in the absorbance of the aromatic C-H and C=C functional groups.…”

Section: Ftir Testing and Functional Group Absorption Band Ratio Inde...mentioning

confidence: 99%

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Surface Modification of Fast-Growing Wood with a Titanium-Dioxide-Based Nanocoating to Improve Weathering Resistance

Rahayu,

Darmawan,

Nawawi

et al. 2023

Coatings

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Acacia mangium requires the addition of a finishing material to increase its resistance to weathering. Herein, the effectiveness of a nanocoating containing titanium dioxide nanoparticles (TiO2-NPs) as a finishing material for mangium wood was investigated. The coating material formulations used were oil-based (V1) and water-based (V2) varnishes with TiO2-NP concentrations of 1% (CT1), 5% (CT5), and 10% (CT10) (w/v). The uncoated and coated samples were subjected to weathering periods of 0, 2, and 4 months. The results showed that the addition of TiO2 nanoparticles to the V1 and V2 varnishes resulted in more gradual colour changes after the weathering period. The surface of the mangium wood also became smoother after being coated. However, the surface roughness increased with the duration of the weathering period. The wettability (K-value) of the sample decreased after coating, indicating that the coated sample was more hydrophobic than the uncoated sample. The results of a photocatalyst test, which analysed the effectiveness of the coatings, showed that the best coating material formulas were V1-CT10 and V2-CT10, as they degraded 75.21% and 71.03% of methylene blue content, respectively. Fourier transform infrared analysis showed that mangium wood did not undergo rapid weathering after the nanocoating treatment, as indicated by an insignificant decrease in the peak absorption intensity of the main structural functional groups of wood.

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Section: Microscopic and Macroscopic Mangium Woodsupporting

confidence: 67%

Section: Microscopic and Macroscopic Mangium Woodmentioning

confidence: 99%

Section: Ftir Testing and Functional Group Absorption Band Ratio Inde...mentioning

confidence: 99%

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Surface Modification of Fast-Growing Wood with a Titanium-Dioxide-Based Nanocoating to Improve Weathering Resistance

Rahayu,

Darmawan,

Nawawi

et al. 2023

Coatings

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“…Hal ini menunjukkan tidak ada NP-TiO2 yang masuk ke dalam kayu dengan indikasi nilai WPG 0 % dan -0,13%. Penggunaan pelarut asam asetat dan NaOH pada proses sintesis NP-TiO2 dapat menimbukan residu senyawa asam dan basa yang dapat menyebabkan proses inisisasi degradasi pada kayu terutama akibat sifat lignin yang sensitif terhadap radiasi UV, larutan asam, dan larutan basa (Svora et al, 2022). Hal ini mengakibatkan pori-pori kayu menjadi lebih besar dan struktur kayu menjadi lebih rapuh sehingga NP-TiO2 mudah mengalami leaching (Costa et al, 2023) dan nilai WPG menjadi 0 % dan negatif.…”

Section: Karaketrisasi Kayu Jabon Terimpregnasi Nanopartikel Titanium...unclassified

Compatibility Testing of Synthesized TiO2 Nanoparticles on The Fast-Growing Wood Physical Properties

Prihatini,

Ismail,

Sekartining Rahayu

et al. 2024

J. Sains Nat.

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Jabon wood (Anthochepalus cadamba) has inferior quality, so it is necessary to modify the wood to improve the quality of its physical properties, namely by impregnating TiO2 nanoparticles (NP-TiO2). This study aims to determine the right synthesis method for the synthesis of NP-TiO2 so as to improve the quality of the physical properties of jabon wood optimally. The results of FTIR testing showed that jabon wood has successfully impregnated NP-TiO2 by hydrothermal and solvothermal methods with ethanol, acetone, and methanol solvents with the identification of the functional group of Ti-O at wavenumber 533 cm-1 and the Ti-O-Ti functional group at wavenumber 679 cm-1 which is the bond formed in the framework of the TiO2 compound. The results of the physical properties test showed that NP-TiO2 which was successfully impregnated into wood was synthesized using hydrothermal and solvothermal methods, namely acetone, methanol, and ethanol, with a WPG value of 1.36%, 2.6%, 2.16%, and 1.61%, respectively. XRD test results show that jabon wood has successfully impregnated NP-TiO2 by hydrothermal and solvothermal methods using acetone, ethanol, and methanol solvents with the identification of anatase TiO2 crystal lattice and crystal sizes of 16.21, 15.94, 14.27, dan 15.75 nm, respectively.

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Directional-Freezing-Assisted In Situ Sol–Gel Strategy to Synthesize High-Strength, Fire-Resistant, and Hydrophobic Wood-Based Composite Aerogels for Thermal Insulation

Yan

Chen

Pan

et al. 2023

Gels

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The undesirable inherent natural characteristics of wood, such as low mechanical strength, flammability, and hygroscopicity, limit its potential applications in the thermal insulation industry. Overcoming these disadvantages can greatly expand the application scope of wood. A new attempt at wood modification, the directional-freezing-assisted in situ sol–gel strategy, was used to obtain wood–silica composite aerogels with the unique multi-level ordered porous structure of wood. This method enables silica nanoparticles to successfully replace lignin and facilitates the formation of strong hydrogen bonds between the silica and cellulose molecules. This results in improved mechanical properties for the composite with a density similar to that of natural wood but a mechanical strength that can be up to five times greater. The thermal conductivity coefficient is also reduced to 0.032 W (m·K)−1 compared to 0.066 W (m·K)−1 for natural wood. This aerogel composite exhibits improved fire resistance and hygroscopicity, with a decomposition temperature increase of approximately 45 °C compared to natural wood. Additionally, the composite demonstrates self-extinguishing behavior, with the structure remaining intact after combustion, and thus enhanced fire resistance. Simultaneously, the enhanced aerogel composite hydrophobicity, with water contact angle of up to 120°, is beneficial to a prominent thermal insulation performance in a high-humidity environment. The successful synthesis of wood-based composite aerogels provides a new and innovative approach for the utilization of wood resources in the thermal insulation industry.

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Study of Interactions between Titanium Dioxide Coating and Wood Cell Wall Ultrastructure

Cited by 3 publications

References 41 publications

Surface Modification of Fast-Growing Wood with a Titanium-Dioxide-Based Nanocoating to Improve Weathering Resistance

Surface Modification of Fast-Growing Wood with a Titanium-Dioxide-Based Nanocoating to Improve Weathering Resistance

Compatibility Testing of Synthesized TiO2 Nanoparticles on The Fast-Growing Wood Physical Properties

Directional-Freezing-Assisted In Situ Sol–Gel Strategy to Synthesize High-Strength, Fire-Resistant, and Hydrophobic Wood-Based Composite Aerogels for Thermal Insulation

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