Study on the Properties of Partially Transparent Wood under Different Delignification Processes

Wu, Yan; Zhou, Jichun; Huang, Qiongtao; Yang, Feng; Wang, Yajing; Wang, Jing

doi:10.3390/polym12030661

Cited by 33 publications

(18 citation statements)

References 24 publications

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“…From the perspective of construction materials, the mechanical properties are equally important 30 . The hierarchical cellular structure of wood leads to unique anisotropic mechanical features.…”

Section: Resultsmentioning

confidence: 99%

Scalable aesthetic transparent wood for energy efficient buildings

et al. 2020

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Nowadays, energy-saving building materials are important for reducing indoor energy consumption by enabling better thermal insulation, promoting effective sunlight harvesting and offering comfortable indoor lighting. Here, we demonstrate a novel scalable aesthetic transparent wood (called aesthetic wood hereafter) with combined aesthetic features (e.g. intact wood patterns), excellent optical properties (an average transmittance of~80% and a haze of~93%), good UV-blocking ability, and low thermal conductivity (0.24 W m −1 K −1) based on a process of spatially selective delignification and epoxy infiltration. Moreover, the rapid fabrication process and mechanical robustness (a high longitudinal tensile strength of 91.95 MPa and toughness of 2.73 MJ m −3) of the aesthetic wood facilitate good scale-up capability (320 mm × 170 mm × 0.6 mm) while saving large amounts of time and energy. The aesthetic wood holds great potential in energy-efficient building applications, such as glass ceilings, rooftops, transparent decorations, and indoor panels.

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Section: Resultsmentioning

confidence: 99%

Scalable aesthetic transparent wood for energy efficient buildings

et al. 2020

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“…According to p F/S, the maximum tensile strength of the sample can be calculated (Wu et al, 2020). In this text, S is the product of the h value and the b value in Table 1.…”

Section: Mechanical Property Analysismentioning

confidence: 99%

Comparison of Multilayer Transparent Wood and Single Layer Transparent Wood With the Same Thickness

Wang

Yang

2021

Front. Mater.

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In this paper, poplar was used as raw material, sodium chlorite was used to delignify it in acidic environment, and then epoxy resin was vacuum impregnated in the delignified wood template to prepare transparent wood. Moreover, in order to imitate the lamination method of plywood, the multilayer transparent wood was prepared by means of staggered vertical lamination. The purpose of this paper is to study the physical and chemical properties of multilayer transparent wood, and to explore the application potential of multilayer transparent wood as a new material by comparing with single layer transparent wood with the same thickness. The weight of wood components in the transparent wood prepared in this experiment accounts for about 30–45% of the weight of composite materials. Scanning electron microscopy (SEM) measurements, Fourier transform attenuated total reflection infrared spectroscopy (ATR-FTIR) characterization, weight gain measurements, UV transmittance measurements, color difference measurements, water contact angle measurements and mechanical properties measurements were used to study. The results showed that as the thickness of the transparent wood increased, the cracks between the resin and the wood cell wall increased, and the interface showed an uneven state. In the case of the same thickness, the multilayer transparent wood was made by laminating transparent wood sheets, with fewer internal cracks and smooth interfaces. Its light transmittance is better than single layer transparent wood. Moreover, compared with single layer transparent wood with the same thickness, the lightness of multilayer transparent wood decreased, and tended to yellow and red. Due to the removal of lignin, the tensile strength of transparent wood decreased during the preparation process. However, it can be seen from the mechanical strength test that the tensile strength of multilayer transparent wood is much higher than that of single layer transparent wood. To a certain extent, multilayer transparent wood can improve the mechanical strength of transparent wood. To conclude, multilayer transparent wood is a kind of natural transparent material with large thickness, good light transmission and excellent mechanical properties, and it has a good development prospect.

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“…Another interesting topic addressed in this issue is the transparency of wood. Wu et al [42] used the orthogonal test method to find the best way of partly delignifying wood. They concluded that this type of transparent wood retained most of the wood texture and color and had a certain degree of light, which means that it may used as a functional decorative material.…”

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confidence: 99%