Large‐Size Transparent Wood for Energy‐Saving Building Applications

Wang, Xuan; Zhan, Tianyi; Liu, Yan; Shi, Jiangtao; Biao, Pan; Zhang, Yaoli; Cai, Liping; Shi, Sheldon Q.

doi:10.1002/cssc.201801826

Cited by 93 publications

(62 citation statements)

References 28 publications

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“…To date, the development of green, energy-saving materials has been a prevailing research topic from the perspective of sustainability in response to the rapidly growing burden of energy consumption and environmental pollution 1 , 2 . Natural materials such as wood and its derivatives have been regarded as one of the most important alternatives in green and energy-efficient buildings due to the abundance, renewability, low cost, and sustainability of source materials 3 , 4 .…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, transparent wood composites can harvest sunlight effectively due to the light guiding effect, which is meaningful for energy saving and comfortable indoor lighting. With these integrated advantages, the transparent wood composites have emerged as the promising engineering components (e.g., rooftops, windows, and transparent decorations) in green energy-efficient buildings 1,9 .…”

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confidence: 99%

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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: Introductionmentioning

confidence: 99%

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confidence: 99%

Scalable aesthetic transparent wood for energy efficient buildings

et al. 2020

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“…Later, Song et al manufactured the highstrength densified wood by coalescent method which combined NaOH/Na 2 SO 3 solution pretreatment and hot press at 100 °C, exhibiting high specific tensile strength of 422.2 MPa cm 3 g −1 , which is higher than some metals [18]. In recent years, NaOH/Na 2 SO 3 solution system was widely used to degrade hemicellulose and lignin in wood cell walls for preparing transparent wood composites [19], super flexible wood [20] or other functional wood materials [21].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of densified wood via synergy of chemical pretreatment, hot-pressing and post mechanical fixation

Shi

Peng

Huang³

et al. 2020

J Wood Sci

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Wood densification can improve the strength of low density wood species and extend wood product applications. To enhance the wood compressive quality, chemical pretreatments for pristine wood have widely been used. Densified Abies wood was fabricated by combining NaOH/Na 2 SO 3 solution treatment, hot-pressing and post mechanical fixation. The appearance, color, chemical composition, and physiology and mechanical properties before and after the densification treatment were examined by the colorimeter, FTIR and mechanical testing machine, respectively. Surface color of Abies wood was changed obviously after the densification. The values of brightness L* and b* decreased but the value of a* showed a slight increase in the densified wood. FTIR results confirmed that the color changes can be explained by the degradation of hemicellulose and lignin in wood cell walls and migration of extractives during the densification process. Sufficient removal of wood polymers resulted in the average compression ratio of about 80% in the radial direction of the natural wood. The density of densified wood increased with the wood thickness up to 1.227 g cm −1 , accounting for a 169% increase compared to that of the pristine wood. Modulus of rupture (MOR) and modulus of elasticity (MOE) in the thickness direction of densified wood also markedly enhanced. Degradation of polymers in wood cell walls also was reconfirmed by the difference of fracture interface. All the results suggested that the densified softwood can be easily fabricated using the proposed method and the new densified softwood can be appropriately used as interior decoration materials.

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“…The experimental results show that by treating the wood fibers, transparent wood with low thermal conductivity and controllable size can be prepared [13]. Some researchers built a mini-cabin with transparent wood fibers instead of glass and found that the transparent wood fibers had a better thermal insulation effect than glass [14].…”

Section: Introductionmentioning

confidence: 99%

Size-Controlled Transparent Jute Fiber for Replacing Transparent Wood in Industry Production Area

et al. 2019

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Transparent jute fiber (TJF) was prepared from delignified jute fiber (DJF) and was subjected to various surface knitting densities (190 and 340 g/m2) before epoxy resin (ER) impregnation under vacuum. The preparation process and properties of TJF were evaluated. The mechanical properties and surface morphology of the jute fiber samples were also studied. The mechanical properties were compared with transparent coir fiber (TCF) and transparent balsa wood (TBW). Optical properties, such as surface color, optical transmittance, and visual haze, of natural jute fiber (JF) and TJF were measured to better understand the influence of delignification. The experimental results showed transparency of 51% even for dense jute fiber cloth, and the maximum transmittance was as high as 60% with a low surface density. TJF had similar tensile strength as TBW but was higher than TCF, indicating a maximum tensile strength of 43.25 MPa with a surface density of 340 g/m2. These results suggest that TJF has the potential to meet the particular optical and mechanical properties of transparent wood. Transparent jute fiber can replace transparent wood for industrial production because of the simple preparation process and lower price.

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Large‐Size Transparent Wood for Energy‐Saving Building Applications

Cited by 93 publications

References 28 publications

Scalable aesthetic transparent wood for energy efficient buildings

Scalable aesthetic transparent wood for energy efficient buildings

Fabrication of densified wood via synergy of chemical pretreatment, hot-pressing and post mechanical fixation

Size-Controlled Transparent Jute Fiber for Replacing Transparent Wood in Industry Production Area

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