A Clear, Strong, and Thermally Insulated Transparent Wood for Energy Efficient Windows

Mi, Ruiyu; Li, Tian; Dalgo, Daniel; Chen, Chaoji; Kuang, Yudi; He, Shuaiming; Zhao, Xinpeng; Xie, Wei-Qi; Gan, Wentao; Zhu, Junyong; Srebric, Jelena; Yang, Ronggui; Hu, Liangbing

doi:10.1002/adfm.201907511

Cited by 146 publications

(95 citation statements)

References 40 publications

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“…Furthermore, near infrared (NIR) light easily passes through transparent wood, which is disadvantageous when maintaining a constant indoor temperature. [148] Mi et al [149] developed thermally insulated transparent wood for potential application in energy efficient windows. The delignified wood slice was infiltrated by PVA and heated at 60 °C to dry and solidify for about 48 h. The transparent wood simultaneously exhibited low haze (≈15%) and high transmittance (≈91%).…”

Section: Applications Of Transparent Woodmentioning

confidence: 99%

“…Mi et al. [ 149 ] developed thermally insulated transparent wood for potential application in energy efficient windows. The delignified wood slice was infiltrated by PVA and heated at 60 °C to dry and solidify for about 48 h. The transparent wood simultaneously exhibited low haze (≈15%) and high transmittance (≈91%).…”

Section: Functional Materials Derived From Delignified Woodmentioning

confidence: 99%

See 1 more Smart Citation

Delignified Wood from Understanding the Hierarchically Aligned Cellulosic Structures to Creating Novel Functional Materials: A Review

Kumar

Jyske

Petrič

2021

Advanced Sustainable Systems

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performance environmentally friendly materials. This is because new processes will be required that allow control on all hierarchical levels. Wood is well defined as a biological engineering material with a complex hierarchical structure of organic material based on cellulose fibrils embedded in a matrix of hemicelluloses and lignin. [1,2] Wood has long been used as a construction material, as well as for pulp and paper production. These applications are highly dependent on the properties of lignin in wood. Removal of lignin is the key step in pulp and paper production, in addition to the conversion of biomass to liquid biofuels. Lignin was first discovered in wood by Anselme Payen in 1839, [3] as the incrusting material that must be removed to isolate the useful fibers in wood. Research pertaining to wood nanotechnology or functional wood materials is a rapidly emerging field. Functional wood materials are mostly fabricated by treating hierarchical natural templates (wood cell wall) by chemical and thermal means. These treatments selectively modify the wood cell wall structure (fine pore spaces and inner lumen surface area) for different applications. [4] The pore region and inner lumen surface have actively been modified to enhance the bulk properties of wood using organic chemicals, [5] inorganic chemicals, organic-inorganic chemicals, [6,7] and thermal methods. [8] Hybrid wood scaffolds have been prepared for diverse applications such as magnetic wood, [9,10] as well as wood-mineral and wood-metal hybrids. [11] Recent research on delignified wood (DW) has emerged from the classical pulp production method. In the preparation of DW, the embedded lignin is removed from the wood cell wall structure, while maintaining the natural hierarchical cellulosic structure. [12] Initially, DW was prepared in order to understand the unknown ultrastructure of wood cell walls. However, since 2015, research in this area has rapidly expanded to focus on the development of wood-based functional scaffolds. Within the literature, DW is predominantly prepared using alkaline delignification methods such as Kraft pulping (a mixture of sodium hydroxide (NaOH) and sodium sulfite (Na 2 SO 3 )) heated to boiling temperature), followed by bleaching using hydrogen peroxide (H 2 O 2 ) to remove the lignin. DW is chemically hydrophilic due to the presence and exposure of hydroxyl groups and possible sites for DW functionalization. DW scaffolds have been functionalized

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Section: Applications Of Transparent Woodmentioning

confidence: 99%

Section: Functional Materials Derived From Delignified Woodmentioning

confidence: 99%

Delignified Wood from Understanding the Hierarchically Aligned Cellulosic Structures to Creating Novel Functional Materials: A Review

Kumar

Jyske

Petrič

2021

Advanced Sustainable Systems

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show abstract

“…Through hot-pressing treatment, the densified wood exhibits significant improvement in mechanical properties [59,60], as shown in Figure 4. By introducing resin with matching refractive index into pores of the delignified wood, a transparent wood with advantages of lightweight, transparency, and environmental friendliness can be prepared [57,61,62] and widely applied as building materials [53] (served as windows [63], walls [64], etc.). It can also be used for optical devices [65], optoelectronic devices [66], oil/water separation [67], functional hydrogels [68], etc.…”

Section: Preparation Of Macroscopic Cellulose Productsmentioning

confidence: 99%

Naturally or artificially constructed nanocellulose architectures for epoxy composites: A review

Soomro

Huang

et al. 2020

Nanotechnology Reviews

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Applications of carbon fiber reinforced epoxy-based composites have been highly restricted due to their high cost in the manufacturing process. Cellulose, a cheap and abundant material from nature, shows excellent mechanical property and structural stability. It shows huge potentials in substituting carbon fiber/epoxy with cellulose/epoxy composites to fulfill the great demands for composites with good performance and a reasonable price. This paper first reviews works about the preparation and regulation of cellulose materials based on the very basic concepts of top-down and bottom-up. Then research about the interfacial regulation between cellulose and epoxy has been discussed in two broad classes of covalent and non-covalent modification. Finally, the enhancement effect of cellulose reinforcement has been discussed in two broad classes of dispersive reinforcement and continuous phase reinforcement. The latter can be further divided into three classes according to the dimension feature (1D, 2D, and 3D). The results show that the nanolization of cellulose is necessary for guaranteeing the strength of composites, while the formation of macroscopic and continuous structures can ensure Young’s modulus of composites.

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“… 29 TW with low thermal conductivity, low specific density, enhanced toughness, and shatterproof features can be considered as good candidate for window-like structures instead of brittle glass. 30 , 31 …”

Section: Introductionmentioning

confidence: 99%

Reversible Dual-Stimuli-Responsive Chromic Transparent Wood Biocomposites for Smart Window Applications

Samanta

Chen

Samanta

et al. 2021

ACS Appl. Mater. Interfaces

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Transparent wood (TW)-based composites are of significant interest for smart window applications. In this research, we demonstrate a facile dual-stimuli-responsive chromic TW where optical properties are reversibly controlled in response to changes in temperature and UV-radiation. For this functionality, bleached wood was impregnated with solvent-free thiol and ene monomers containing chromic components, consisting of a mixture of thermo-and photoresponsive chromophores, and was then UV-polymerized. Independent optical properties of individual chromic components were retained in the compositional mixture. This allowed to enhance the absolute optical transmission to 4 times above the phase change temperature. At the same time, the transmission at 550 nm could be reduced 11−77%, on exposure to UV by changing the concentration of chromic components. Chromic components were localized inside the lumen of the wood structure, and durable reversible optical properties were demonstrated by multiple cycling testing. In addition, the chromic TW composites showed reversible energy absorption capabilities for heat storage applications and demonstrated an enhancement of 64% in the tensile modulus as compared to a native thiol−ene polymer. This study elucidates the polymerization process and effect of chromic components distribution and composition on the material's performance and perspectives toward the development of smart photoresponsive windows with energy storage capabilities.

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A Clear, Strong, and Thermally Insulated Transparent Wood for Energy Efficient Windows

Cited by 146 publications

References 40 publications

Delignified Wood from Understanding the Hierarchically Aligned Cellulosic Structures to Creating Novel Functional Materials: A Review

Delignified Wood from Understanding the Hierarchically Aligned Cellulosic Structures to Creating Novel Functional Materials: A Review

Naturally or artificially constructed nanocellulose architectures for epoxy composites: A review

Reversible Dual-Stimuli-Responsive Chromic Transparent Wood Biocomposites for Smart Window Applications

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